ADAM-5000 Series I/O Module User's Manual Copyright Notice This document is copyrighted, 1997, by Advantech Co., Ltd. All rights are reserved. Advantech Co., Ltd., reserves the right to make improvements to the products described in this manual at any time without notice. No part of this manual may be reproduced, copied, translated or transmitted in any form or by any means without the prior written permission of Advantech Co., Ltd.
I/O Module Introduction Table of Contents Chapter 1 Introduction ….……..................…..................…………. 1-1 Chapter 2 Analog Input Modules..................….................…....... 2-1 2.1 ADAM-5013 3-channel RTD input module…............................2-2 2.2 ADAM-5017 8-channel analog input module…….…............... 2-5 2.3 ADAM-5017H 8-channel high speed analog input module…. 2-8 2.4 ADAM-5018 7-channel thermocouple input module ………..2-13 Chapter 3 Analog Output Modules ....................
I/O Module Introduction Chapter 5 Serial Communication Module………..….................... 5-1 5.1 ADAM-5090 4-port RS-232 Communication Module................5-2 Chapter 6 Analog I/O Modules Calibration.................................. 6-1 6.1 Analog input module calibration……………………………….. 6-2 6.2 ADAM-5013 RTD Input Resistance Calibration……………….. 6-7 6.3 Analog output module calibration .......
Introduction 1
Introduction This manual introduces the detail specifications functions and application wiring of each ADAM-5000 I/O modules. To organize an ADAM-5510 Series Controller, you need to select I/O modules to interface the main unit with field devices or processes that you have previously determined. Advantech provides 20 types of ADAM-5000 I/O modules for various applications so far. Following table is the I/ O modules support list we provided for user’s choice. Module Name Specification ADAM-5013 3-ch.
Analog Input Modules 2
Analog Input module Analog input modules use an A/D converter to convert sensor voltage, current, thermocouple or RTD signals into digital data. The digital data is then translated into engineering units. The analog input modules protect your equipment from ground loops and power surges by providing opto-isolation of the A/D input and transformer based isolation up to3,000 VDC. 2.
Chapter 2 Application wiring Figure 2-2: RTD inputs 2-3
Analog Input module Technical specifications of ADAM-5013 three Analog input channels Input type Pt or Ni RTD Pt -100 to 100°C a=0.00385 Pt 0 to 100°C a=0.00385 Pt 0 to 200°C a=0.00385 Pt 0 to 600°C a=0.00385 RTD type and temperature range Pt -100 to 100°C a=0.00392 Pt 0 to 100°C a=0.00392 Pt 0 to 200°C a=0.00392 Pt 0 to 600°C a=0.00392 Ni -80 to 100°C Ni 0 to 100°C Isolation voltage Sampling rate 3000 VDC 10 samples/sec (total) Input impedance 2 MΩ Bandwidth 13.1 Hz @ 50 Hz, 15.
Chapter 2 2.2 ADAM-5017 8-channel analog input module The ADAM-5017 is a 16-bit, 8-channel analog differential input module that provides programmable input ranges on all channels. It accepts millivolt inputs (±150mV, ±500mV), voltage inputs (±1V, ±5V and ±10V) and current input (±20 mA, requires 125 ohms resistor). The module provides data to the host computer in engineering units (mV, V or mA). This module is an extremely cost-effective solution for industrial measurement and monitoring applications.
Analog Input module Application wiring Figure2-4: Millivolt and volt input Figure 2-5: Process current input Note: To keep measurement accuracy please short the channels that are not in use.
Chapter 2 Technical specifications of ADAM-5017 Analog Input Channels Eight differential Input Type mV, V, mA Input Range ± 150 mV, ± 500 mV, ± 1 V, ± 5 V, ± 10 V and ± 20 mA Isolation Voltage 3000 VDC Sampling Rate 10 samples/sec (total) Analog Input Signal Limit 15 V max. Max. allowable voltage difference between two connectors in a module 15 V max. Input Impedance 2 Mohms Bandwidth 13.1 Hz @ 50 Hz, 15.72 Hz @ 60 Hz Accuracy ± 0.1% or better Zero Drift ± 1.
Analog Input module 2.3 ADAM-5017H 8-channel high speed analog input module The ADAM-5017H is a 12-bit plus sign bit, 8-channel analog differential input module that provides programmable input ranges on each channel. It accepts millivolt inputs (± 500 mV, 0-500 mV), voltage inputs (±1 V, 0-1V, ±2.5 V, 0-2.5 V, ±5 V, 0-5 V, ±10 V and 0-10 V) and current inputs (0-20 mA and 4-20 mA; requires a 125 ohms resistor).
Chapter 2 Application wiring Figure 2-7: Millivolt and volt input Figure 2-8: Process current input 2-9
Analog Input module Figure 2-9: Locations of 125-ohm resistors Note: To maintain measurement accuracy please short channels not in use.
Chapter 2 Technical specifications of ADAM-5017H Analog Input Channels 8 differential ADC Resolution 12 bits, plus sign bit Type of ADC Successive approximation Isolation Voltage 3000 VDC 100 Hz Sampling Rate Input Impedance 20 Mohms (voltage inputs); 125 ohms (current inputs) Signal Input Bandwidth Analog Signal Range Analog Signal Range for any two measured Pins Power Requirements Power Consumption 1000 Hz for both voltage inputs and current inputs ±15 V max. ±15 V max.
Analog Input module Input Range 0 ~ 11 V ±1 LSB Offset Gain Error @ - Error @ 10 to 25°C +70°C ±2 LSB ±1 LSB 0 ~ 5.5 V ±1 LSB ±2 LSB ±1.5 LSB 0 ~ 2.5 V 0 ~ 2.75 V ±1 LSB ±2 LSB ±1.5 LSB 0~1V 0 ~ 1.375 V ±1 LSB Voltage 0 ~ 10 V Inputs 0~5V With Offset Overranging Error @ 25°C 0 ~ 500 mV 0 ~ 687.5 mV ± 10 V ±11 V ±1 LSB ±2 LSB ±1 LSB ±5V ±0 ~ 5.5 V ±1 LSB ±2 LSB ±1.5 LSB ± 2.5 V ±0 ~ 2.75 V ±1 LSB ±2 LSB ±1.5 LSB ±1V ±0 ~ 1.375 V ±1 LSB ±2.5 LSB ±2 LSB ± 500 mV ±0 ~ 687.
Chapter 2 2.4 ADAM-5018 7-channel thermocouple input module The ADAM-5018 is a 16-bit, 7-channel thermocouple input module that features programmable input ranges on all channels. It accepts millivolt inputs (±15 mV, ±50 mV, ±100 mV, ±500 mV), voltage inputs (±1 V, ±2.5 V), current input (±20 mA, requires 125 ohms resistor) and thermocouple input (J, K, T, R, S, E, B). The module forwards the data to the host computer in engineering units (mV, V, mA or temperature °C).
Analog Input module Application wiring Figure 2-11: Thermocouple input 2-14 ADAM 5000 IO modules User’s Manual
Chapter 2 Technical specifications of ADAM-5018 Analog Input Channels Input Type Seven differential mV, V, mA, Thermocouple Input Range ± 15 mV, ± 50 mV, ± 100 mV, ± 500 mV, ± 1 V, ± 2.5 V and ± 20 mA T/C Type and Temperature Range JKTERSB Isolation Voltage 3000 VDC Sampling Rate 10 samples/sec (total) Input Impedance 2 Mohms Bandwidth 0 to 760 °C 0 to 1370 °C -100 to 400 °C 0 to 1400 °C 500 to 1750 °C 500 to 1750 °C 500 to 1800 °C 13.1 Hz @ 50 Hz, 15.72 Hz @ 60 Hz Accuracy ± 0.
Analog Output Module 3
Analog Output Module 3.1 ADAM-5024 4-channel analog output module The ADAM-5024 is a 4-channel analog output module. It receives its digital input through the RS-485 interface of the ADAM-5510 system module from the host computer. The format of the data is engineering units. It then uses the D/A converter controlled by the system module to convert the digital data into output signals. You can specify slew rates and start up currents through the configuration software.
Chapter 3 Application wiring Figure 3-2: Analog output Technical specifications of ADAM-5024 Analog Output Channels Four Output Type V, mA Output Range 0-20mA, 4-20mA, 0-10V Isolation Voltage 3000 Vdc Output Impedance 0.5 Ohms Accuracy ±0.1% of FSR for current output ±0.2% of FSR for voltage output Zero Drift Voltage output: ±30 µV/ºC Current output: ±0.2 µA/ºC Resolution ±0.015% of FSR Span Temperature Coefficient ±25 PPM/ºC Programmable Output Slope 0.125-128.0 mA/sec 0.0625-64.
Digital Input/Output Modules 4
Digital Input/Digital Output Module 4.1 ADAM-5050 16-channel universal digital I/O module The ADAM-5050 features sixteen digital input/output channels. Each channel can be independently configured to be an input or an output channel by the setting of its DIP switch. The digital outputs are open collector transistor switches that can be controlled from the ADAM-5000. The switches can also be used to control solid-state relays, which in turn can control heaters, pumps and power equipment.
Chapter 4 Application wiring Figure 4-3: Dry contact signal input (ADAM-5050) Figure 4-4: Wet contact signal input (ADAM-5050) Figure 4-5: Digital output used with SSR (ADAM-5050/5056) 4-3
Digital Input/Digital Output Module Technical specifications of ADAM-5050 Points Channel Setting 16 Bitwise selectable by DIP switch Digital Input Dry Contact Logic Level 0: close to GND Logic Level 1: open Wet Contact Logic Level 0: +2 V max Logic Level 1: +4 V to 30 V Digital Output Open collector to 30 V, 100mA max load Power Dissipation 450 mW Power Consumption 0.
Chapter 4 4.2 ADAM-5051 series digital input module 4.2.1 ADAM-5051(D) 16-channel digital input module The ADAM-5051 provides sixteen digital input channels. The ADAM5510 can use the module’s digital inputs to determine the state of limit or safety switches or to receive remote digital signals.
Digital Input/Digital Output Module Figure 4-8: Contact closure input (ADAM-5051/5051D) Technical specifications of ADAM-5051/5051D Points 16 Digital input Logic level 0: + 1 V max Logic level 1: + 3.5 to 30 V Pull up current: 0.5 mA 10 kΩresistor to + 5 V Power consumption 0.
Chapter 4 4.2.2 ADAM-5051S 16-channel Isolated Digital Input Module with LED The ADAM-5051S provides 16 isolated digital input channels for critical environments need individual channel isolating protection. Different from other ADAM-5000 I/O modules, ADAM-5051S designed with 21 pins plug terminal.
Digital Input/Digital Output Module Technical specification of ADAM-5051S Point 16(4-channel/group) Digital Input Logic Level 0: + 3 V max Logic Level 1: + 10 to 50 V Optical Isolation Opto-isolator response time Over-voltage Protection 2500 VDC 25 µs Power Consumption 70 VDC 0.
Chapter 4 4.3 ADAM-5052 8-channel isolated digital input module The ADAM-5052 provides eight fully independent isolated channels. All have 5000 VRMS isolation to prevent ground loop effects and to pre- vent damage from power surges on the input lines.
Digital Input/Digital Output Module Technical specifications of ADAM-5052 Points 8 Differential Digital input Logic level 0: + 1 V max Logic level 1: + 3.5 to 30 V Isolation voltage: 5000 V RMS Resistance: 3 kΩ/ 0.5 W Power consumption 0.
Chapter 4 4.4 ADAM-5055S 16-channel Isolated Digital I/O Module with LED The ADAM-5056S provides 8 isolated digital input and 8 isolated output channels for critical environments need individual channel isolating protection. Different from other ADAM-5000 I/O modules, ADAM-5051S designed with 21 pins plug terminal.
Digital Input/Digital Output Module Technical specification of ADAM-5055S Points 16 Digital Output 8 (8-channel/group) Open collector to 40 V 200 mA max Optical Isolation 2500 VDC 25 µs Opto-isolator response time Supply Voltage Digital Input 5 ~ 40 VDC Dry Contact & Wet contact Selectable Optical Isolation 2500 VDC 25 µs Opto-isolator response time Over-voltage Protect load per channel 8(4-channel/group) Dry Contact Logic Level 0: close to GND Logic Level 1: open Wet Contact Logic Level 0:
Chapter 4 4.5 ADAM-5056(D) series digital output module w/LED 4.5.1 ADAM-5056(D) 16-channel digital output module w/LED The ADAM-5056 features sixteen digital output channels. The digital outputs are open-collector transistor switches that you can control from the ADAM-5000 main unit. You also can use the switches to control solidstate relays.
Digital Input/Digital Output Module Technical specifications of ADAM-5056 There are 16-point digital input and 16-point digital output modules in the ADAM-5000 series. The addition of these solid state digital I/O devices allows these modules to control or monitor the interfaces between high power DC or AC lines and TTL logic signals. A command from the host converts these signals into logic levels suitable for the solid-state I/O devices.
Chapter 4 Application wiring Figure 4-18: ADAM-5056S module wiring diagram Points 16(8-channel/group) Digital Output Open collector to 40 V 200 mA max load per channel Optical Isolation Opto-isolator response time Supply Voltage 2500 VDC 25 µs Power consumption 5 ~ 40 VDC 0.
Digital Input/Digital Output Module 4.5.3 ADAM-5056SO 16-channel Isolated Digital Output Module with LED The ADAM-5056SO provides 16 channels source type isolated digital output for critical environments need individual channel isolating protection. Addition to the source output wiring, all of the specification and command sets are the same with ADAM-5056S.
Chapter 4 Technical Specification of ADAM-5056SO Points 16(8-channel/group) Digital Output Open collector to 40 V 200 mA max load per channel Optical Isolation 2500 VDC Opto-isolator response time 25 us Supply Voltage 5 ~ 40 VDC Power consumption 0.
Digital Input/Digital Output Module 4.6 Relay Output Modules 4.6.1 ADAM-5060 relay output module The ADAM-5060 relay output module is a low-cost alternative to SSR modules. It provides 6 relay channels, two of Form A and four of Form C.
Chapter 4 Technical specifications of ADAM-5060 6, two Form A and four Form C Points Contact rating AC: 125 V @ 0.6A; 250 V @ 0.3 A DC: 30 V @ 2 A; 110 V @ 0.6 A 500 VAC(50/60 Hz) Breakdown voltage Relay on time (typical) 3 ms Relay off time (typical) 1 ms Total switching time 10 ms Insulation resistance 1000 MΩ min. @ 500 VDC Power consumption 0.7 W Table 4-9: Technical specifications of ADAM-5060 4.6.
Digital Input/Digital Output Module Application wiring Figure 4-24: Relay output Technical specifications of ADAM-5068 Points Contact Rating 8 Form A AC: 120 V @ 0.5 A DC: 30 V @ 1 A Breakdown Voltage Relay On Time (typical) 500 VAC(50/60 Hz) 7 msec. Relay Off Time (typical) 3 msec. Total Switching Time 10 msec. Power Consumption 2.
Chapter 4 4.6.3 ADAM-5069 power relay output module The ADAM-5069 power relay output module provides 8 relay channels of Form A. Switches can be used to control the relays. Considered to user friendly, the ADAM-5069 also built with LED indicator for status reading easily. And it also provides a choice to clear or keep output status when reset by adjusting a jumper.
Digital Input/Digital Output Module 4.7 Counter/Frequency Module Overview Compatible ADAM-5000 Series Main Units ADAM-5080 is a 4-channel counter/frequency module designed to be implemented within the following Advantech ADAM-5000 series main units: ADAM-5000/485 ADAM-5510 ADAM-5511 ADAM-5510M ADAM-5510E ADAM-5510/TCP ADAM-5510E/TCP Please make sure that the ADAM-5080 counter/frequency module is properly inserted into the compatible main units. 4.7.
Chapter 4 Alarm Setting Function While in counter mode, you can set alarm status--Disable and Latch. If you want to disable it, you can select Disable. If Latch status is selected, it means the Alarm status will be "latched" whenever the alarm being triggered. Once the alarm status being "latched," it will thereafter stay in that triggered state. Users will have to issue a "Clear Alarm Status" command to return the "latched" alarm status back to normal.
Digital Input/Digital Output Module ADAM-5080 Application Wiring Figure 4-27: Isolated Input Level Figure 4-28: TTL Input Level 4-24 ADAM 5000 IO modules User’s Manual
Chapter 4 ADAM-5080 Counter/Frequency Mode Selection Users can select Bi-direction, Up/Down Counter or Frequency option as shown in Figure 44. Figure 4-29: Counter / Frequency Mode Note: All four channels of ADAM-5080 will operate simultaneously in the mode you have selected. i.e. If you switch the ADAM5080 to Counter Mode, all four channels will operate in Counter Mode.
Digital Input/Digital Output Module Figure 4-30: Wiring for Up/Down Counting Note: If you need only one type of counting, connect C0A+ and C0Afor Up Counting only; or connect C0B+ and C0B- for Down Counting only. Bi-direction Counting For implementing Bi-direction Counting, you need to connect C0B+/D+ and C0B-/D- to implement the control function for Up/Down Counting. Up Counting : when the input signal is within logic level "1", the counter value increases.
Chapter 4 Features -- Frequency Mode If users want to select frequency mode, they can only utilize Up Counting type, and can only connect to C0A+ and C0A-. Figure 4-32: Wiring for Frequency Mode Features -- Alarm Setting According to your application purposes, you can run the utility program to set different limit values for High/Low Alarm.
Digital Input/Digital Output Module Setting Initial Counter Value In order to utilize the alarm function, users have to set a high-alarm limit value and/or a low alarm limit value, and a initial value to fulfill the requirements for a basic alarm setting. Figure 4-34: Sending Alarm Signal (recommended settings) Figure 4-35: Sending Alarm Signal (settings not recommended) Overflow Value Overflow value is the number of times the counter value exceeds the Max/Min values you specified.
Chapter 4 Getting the Totalizer Value If users want to get the actual counter value, a formula such as follows can facilitate an easy calculation from the initial counter value, overflow value and current counter value: Vtol = {|Vini - Vmin (or Vmax) |+ 1} x |Vvf| + |Vini - Vcur| Vtol : totalizer value Vini : initial counter value Vmin : min. couner value = 0 (fixed value) Vmax : max.
Digital Input/Digital Output Module Features--Digital Output Mapping If users want to use Digital Output function, ADAM utility is available for setting specifically which module, channel or slot to receive the alarm signals. Figure 4-36: Digital Output Mapping 1: 2: 3: 4: High Alarm State--Set Alarm state to "Latch" or "Disable". High Alarm Limit--Set Alarm limit from 0 to 4,294,967,295. High Alarm Output Mode--Enable or Disable D.O. Mapping. High Alarm Output Slot--Users can select D.
Chapter 4 TTL/Isolated Input Level According to your need, you can select either TTL or Isolated Input Level by setting the configuration for the jumpers. Select the proper jumper settings for either TTL or Isolated Input according to Figure 53. Please note that you must configure all six jumpers to the correct configuration for proper function.
Digital Input/Digital Output Module ADAM-5080 Technical Specifications Channel 4 Input Frequency 0.3 ~ 1000 Hz max. (Frequency mode) 5000 Hz max. (Counter mode) Input Level Isolated or TTL level Minimum Pulse Width 500 µ sec. (Frequency mode) 100 µ sec. (Counter mode) Minimum Input Current 2mA (Isolated) Isolated Input Level Logic Level 0 : +1 VMAX Logic Level 1 : + 3.5 V to 30 V TTL Input Level Logic Level 0 : 0 V to 0.8 V Logic Level 1 : 2.
Serial Communication Module 5
Serial Communication Module Overview Compatible ADAM-5000 Series Main Units The ADAM-5090 is a 4-port RS-232 communication module to be implemented with the following Advantech ADAM-5000 series main units: ADAM-5510 (with library Version V1.10 or above) ADAM-5511 (with library Version V1.10 or above) 5.1 ADAM-5090 4-port RS-232 Communication Module Bi-direction Communication The ADAM-5090 is equipped with four RS-232 ports, which makes it especially suitable for bi-direction communication.
Chapter 5 Communication Backup Function With the ADAM-5090 you can implement dual communication channels between your PC and the ADAM system. Even when one of the two communication channels is down, your system can still function through the alternative communication channel. This dual communication channels can be implemented by application software.
Serial Communication Module PIN Mapping PIN Name RJ-48 DB9 /DCD 1 1 RX 2 2 TX 3 3 /DTR 4 4 GND 5 5 /DSR 6 6 /RTS 7 7 /CTS 8 8 RI or +5V 9 9 GND 10 X Table 5-2: Pin Mapping ADAM-5090 Technical Specification Function Provides communication ports for the ADAM-5510 to integrate other devices with communication function into your system Electrical Interface 4 ports (RS-232) Communication Rates 4800, 9600, 19200, 38400, 115200bps FIFO 128 bytes/per UART (Tx/Rx) Indicator
Chapter 5 I/O Slots and I/O Ports Numbering The ADAM-5090 module provides four RS-232 ports for communication with target devices. The ports are numbered 1 through 4. For programming, the definition of port number depends on the slot number and port number. For example, the second port on the ADAM-5090 in slot 1 is defined to port 12 . Jumper Settings This section tells you how to set the jumpers to configure your ADAM5090 module. There are four jumpers on the PC Board.
Serial Communication Module LED Status of the ADAM-5090 Module There are two LEDs for each port on the front panel of the ADAM-5090 to display specific communication status: a. Green LED (RX): Data Receiving Status; the LED indicator is on when the port is receiving data. b. Orange LED (TX): Data Transmitting Status; the LED indicator is on when the port is transmitting data.
Chapter 5 port_set_speed(1,115200L); //Enable Port FIFO. Here we enable 128 byte FIFO for port1. port_enable_fifo(1); //After these above settings are enabled, you can apply any other function library to implement your program.
Analog I/O Modules Calibration 6
Analog I/O Modules Calibration Analog input/output modules are calibrated when you receive them. However, calibration is sometimes required. No screwdriver is necessary because calibration is done in software with calibration parameters stored in the ADAM-5000 analog I/O module‘s onboard EEPROM. The ADAM-5000 system comes with the ADAM utility software that supports calibration of analog input and analog output.
Chapter 6 Figure 6-2: Zero calibration 5. Execute the Span Calibration command. This can be done with the ADAM utility software.
Analog I/O Modules Calibration 6. CJC Calibration (only for T/C input module) Figure 6-4: Cold junction calibration * Note: Zero calibration and span calibration must be completed before CJC calibration. To calibrate CJC, the thermocouple attached to ADAM-5018 and a standard thermometer should be used to measure a standard known temperature, such as the freezing point of pure water.
Chapter 6 Calibration voltage (ADAM-5017/5018) Module Input Range Code (Hex) Input Range Span Calibration Voltage 5018 00h ±15 mV +15 mV 01h ±50 mV +50 mV 02h ±100 mV +100 mV 5017 03h ±500 mV +500 mV 04h ±1 mV +1 V 05h ±2.5 V +2.
Analog I/O Modules Calibration Calibration voltage (ADAM-5017H) Module Input Range Code (Hex) Input Range Span Calibration Voltage 00h ±10 V +10 V 01h 0 ~ 10 V +10 V 02h ±5 V +5 V 03h 0~5V +5 V 04h ±2.5 V +2.5 V 05h 0 ~ 2.5 V +2.5 V 06h ±1 V +1 V 07h 0~1V +1 V 08h ±500 mV +500 mV 09h 0 ~ 500 mV +500 mV 0ah 4 ~ 20 mA *(1) 0bh 0 ~ 20 mA *(1) 5017H Table 6-2: Calibration voltage of ADAM-5017H Note: You can substitute 2.
Chapter 6 6.2 ADAM-5013 RTD Input Resistance Calibration 1. Apply power to the module and let it warm up for about 30 minutes. 2. Make sure that the module is correctly installed and is properly con- figured for the input range you want to calibrate. You can use the ADAM utility software to help in this. 3. Connect the correct reference self resistance between the screw terminals of the ADAM-5013 as shown in the following wiring diagram.
Analog I/O Modules Calibration Calibration resistances (ADAM-5013) Input Range Code (Hex) Input Range Span Calibration Resistance Zero Calibration Resistance 20 Pt, -100 to 100°C A = 0.00385 140 Ohms 60 Ohms 21 Pt, 0 to 100°C A = 0.00385 140 Ohms 60 Ohms 22 Pt, 0 to 200°C A = 0.00385 200 Ohms 60 Ohms 23 Pt, 0 to 600°C A = 0.00385 440 Ohms 60 Ohms 24 Pt, -100 to 100°C A = 0.00392 140 Ohms 60 Ohms 25 Pt, 0 to 100°C A = 0.00392 140 Ohms 60 Ohms 26 Pt, 0 to 200°C A = 0.
Chapter 6 6.3 Analog output module calibration The output current of analog output modules can be calibrated by using a low calibration value and a high calibration value. The analog output modules can be configured for one of two ranges: 0-20 mA and 4-20 mA. Since the low limit of the 0-20 mA range (0 mA) is internally an absolute reference (no power or immeasurably small power), just two levels are needed for calibration: 4 mA and 20 mA. 1.
Analog I/O Modules Calibration 4. Issue the Analog Data Out command to the module with an output value of 4 mA. 5. Check the actual output value at the modules terminals. If this does not equal 4 mA, use the "Trim" option in the "Calibrate" submenu to change the actual output. Trim the module until the mA meter indicates exactly 4 mA, or in case of a voltage meter with shunt resistor, the meter indicates exactly 1 V.