Owner’s Guide 0300128-03 Rev.
Important Notes 1. Please read all the information in this owner’s guide before installing the product. 2. The information in this owner's guide applies to hardware and firmware version 1.0 or later. 3. This guide assumes that the reader has a full working knowledge of the relevant processor. Notice The products and services described in this owner's guide are useful in a wide variety of applications.
Table Of Contents Preface Overview And Specifications Who Should Use This Guide ....................................................................... iii What This Guide Covers ............................................................................. iii Related Allen-Bradley Documents .............................................................. iii Terms & Abbreviations You Should Know ................................................... iv Chapter 1 General Features And Benefits ...............
ii SLC 500™ Isolated Analog Output Modules Maintaining Your Module And Ensuring Safety Chapter 6 Preventive Maintenance ............................................................................. 33 Safety Considerations ................................................................................ 33 Tables Table 1. Related Allen-Bradley documents ................................................. iv Table 2. Electrical specifications—module ...................................................
Preface Read this preface to familiarize yourself with the rest of the owner’s guide. This preface covers: • who should use this guide • what this guide covers • related Allen-Bradley documents • terms & abbreviations you should know Who Should Use This Guide Use this guide if you design, install, program, or maintain a control system that uses Allen-Bradley Small Logic Controllers. You should have a basic understanding of SLC 500 products.
iv SLC 500™ Isolated Analog Output Modules Table 1. Related Allen-Bradley documents Allen-Bradley Doc. No. Title 1747-2.30 SLC 500 System Overview SGI-1.1 Application Considerations for Solid State Controls 1770-4.1 Allen-Bradley Programmable Controller Grounding and Wiring Guidelines 1747-6.2 Installation & Operation Manual for Modular Hardware Style Programmable Controllers 1747-NI001 Installation & Operation Manual for Fixed Hardware Style Programmable Controllers 1747-6.
Preface v Common mode voltage – The voltage difference between the negative terminal and analog common during normal differential operation. Common mode voltage range – The largest voltage difference allowed between either the positive or negative terminal and analog common during normal differential operation. Configuration word – Contains the channel configuration information needed by the module to configure and operate each channel.
vi SLC 500™ Isolated Analog Output Modules Overall accuracy – The worst-case deviation of the signal over the full range, expressed in percent of full scale. Rack – A hardware assembly that houses devices such as I/O modules, adapter modules, processor modules, and power supplies. Repeatability – The closeness of agreement among repeated measurements of the same variable under the same conditions. Resolution – The smallest detectable change in a measurement, typically expressed in engineering units (e.g.
Chapter 1 Overview And Specifications The 1746sc-INO4i provides four isolated channels of current outputs, while the 1746sc-INO4vi provides four isolated channels of current or voltage outputs (in any combination). In both modules, the voltage and/or current ranges are independently configurable for each channel. These modules also provide new, advanced features to make your control systems more dependable and flexible.
2 SLC 500™ Isolated Analog Output Modules provide a single-slot solution for applications requiring up to four, mixed analog outputs, so you don’t have to buy more I/O than you need. State-of-the-Art Performance These modules incorporate proprietary Allen-Bradley technology, so they operate and perform like the latest Allen-Bradley products.
Chapter 1: Overview And Specifications 3 Table 3.
4 SLC 500™ Isolated Analog Output Modules Table 5.
Chapter 2 Installing And Wiring Your Module Read this chapter to install and wire your module. This chapter covers: • avoiding electrostatic damage • determining power requirements • setting the DIP switch • selecting a rack slot • inserting your module into the rack • wiring your module Note that although your module has a jumper on its printed circuit board, this jumper is for the manufacturer’s use only. Also, your module was calibrated by the manufacturer, so you don’t need to perform this task.
6 SLC 500™ Isolated Analog Output Modules The following documents contain information that may help you as you install and wire your module: • National Electrical Code, published by the National Fire Protection Association of Boston, MA • IEEE Standard 518-1977, Guide for the Installation of Electrical Equipment to Minimize Electrical Noise Inputs to Controllers from External Sources • IEEE Standard 142-1982, Recommended Practices for Grounding of Industrial and Commercial Power Systems • Noise Reduction
Chapter 2: Installing And Wiring Your Module 7 Table 6. Backplane current consumed 24 Vdc * Catalog Number 5 Vdc w/o ext. supply w/ ext. supply 1746-sc-INO4i 120 mA 250 mA 0 mA 1746sc-INO4vi 120 mA 250 mA 0 mA * The 1746sc-INO4i and 1746sc-INO4vi output modules can use an external 24 Vdc power supply to reduce backplane loading. To use an external 24 Vdc power supply, you must set your module’s DIP switch as indicated in the following subsection.
8 SLC 500™ Isolated Analog Output Modules Selecting A Rack Slot Two factors determine where you should install your module in the rack: ambient temperature and electrical noise.
Chapter 2: Installing And Wiring Your Module 9 To insert your module into the rack, follow these steps: 1. Align the circuit board of your module with the card guides at the top and bottom of the chassis. 2. Slide your module into the chassis until both top and bottom retaining clips are secure. Apply firm even pressure on your module to attach it to its backplane connector. Never force your module into the slot. Cover all unused slots with the Card Slot Filler, Allen-Bradley part number 1746-N2.
10 SLC 500™ Isolated Analog Output Modules Wiring Your Module To wire the terminal block, you need: • a small, flat-blade screwdriver • Belden 8761 (shielded, twisted pair) cable or equivalent ! CAUTION POSSIBLE EQUIPMENT OPERATION Before wiring your module, always disconnect power from the SLC 500 system and from any other source to the module. Failure to observe this precaution can cause unintended equipment operation and damage.
Chapter 2: Installing And Wiring Your Module 11 4. At one end of the cable, twist the drain wire and foil shield together, bend them away from the cable, and apply shrink wrap. Foil Shield and Drain Wire Insulation Black Wire Clear Wire 5. At the other end of the cable, cut the drain wire and foil shield back to the cable and apply shrink wrap. Insulation Black Wire Clear Wire 6. Connect the wires to the terminal block and field device as shown in the following figures and table.
12 SLC 500™ Isolated Analog Output Modules Figure 2. Wiring diagrams (showing differential outputs). -INO4i Not used 0 Current output, ch. 0 1 Analog ground, ch. 0 2 Chassis ground 3 Not used 4 Current output, ch. 1 5 Analog ground, ch. 1 6 Not used 7 Current output, ch. 2 8 Analog ground, ch. 2 9 Chassis ground 10 Not used 11 Current output, ch. 3 12 Analog ground, ch.
Chapter 3 Things To Consider Before Using Your Module Read this chapter to familiarize yourself with: • how the processor communicates with your module • channel update time • channel enable and disable times • temperature calibration time • output mode change time (-INO4vi only) • your module’s response to slot disabling How The Processor Communicates With Your Module Your processor transfers data to (and receives data from) the processor through an image table residing in the data files of your process
14 SLC 500™ Isolated Analog Output Modules In general, you can reduce the channel update time by disabling unused channels, as shown in the following table: Table 7. Channel update time (channels already enabled ①) # of ch. enabled Time Current output 1 2 3 4 24.3 ms (typical) 27.3 30.7 33.7 Voltage output (-INO4vi only) 1 2 3 4 24.3 26.9 30.1 32.7 ① When the module must enable a disabled channel, add 1.2 ms to the time shown. For the fastest possible channel update time, enable only one channel.
Chapter 4 Using Your Output Module Read this chapter to: • enter your output module’s ID code • configure each output channel • set the output data limits or user-defined scale (optional) • control each output channel’s signal • monitor each output channel • check each output channel’s configuration and status To use your module, you need: • programming equipment • Allen-Bradley Advanced Programming Software (APS) For help with APS, see the Getting Started Guide for APS.
16 SLC 500™ Isolated Analog Output Modules No special I/O configuration (SPIO CONFIG) information is required. The module ID code automatically assigns the correct number of input and output words for the processor to access. Figure 4. Output and input words Address O:e.0 0 15 Channel 0 Output Data Word O:e.1 Channel 1 Output Data Word O:e.2 Channel 2 Output Data Word O:e.3 Channel 3 Output Data Word O:e.4 Channel 1 Configuration Byte Channel 0 Configuration Byte O:e.
Chapter 4: Using Your Output Module 17 Output Image The 8-word, output image (defined as the output from the SLC processor to your module) defines how each channel on your module works: • The output data words control output signal levels for each channel. • The configuration bytes replace configuration DIP switches on your module. In your output module, each word configures two channels (one independent byte per channel).
18 SLC 500™ Isolated Analog Output Modules Configuring Each Output Channel Address O:e.4 After installing your module, you must configure each channel by setting bit values in each configuration word. Output words 4 and 5 of the output image file (addresses O:e.4 and O:e.5) configure channels 0–1 and 2–3, respectively. 0 15 O:e.
Chapter 4: Using Your Output Module 19 Output Channel Enable (configuration bits 0 and 8) Use this bit to enable or disable a channel. To minimize update times, disable any unused channels. When you set the channel enable bit to one, the module reads the configuration word. Before accepting any new data as valid, verify that the status word (described in the last subsection of this chapter) reflects the changes you made.
20 SLC 500™ Isolated Analog Output Modules Table 10. Data format definitions Selected Data Value (counts) Output Range Min. Max. Corresponding Signal Min. Max. Engineering Units ±10 V 0–10 V 0–5 V 1–5 V 0–20 mA 0–21 mA 4–20 mA -10250 -500 -500 +500 0 0 +3500 +10250 +10250 +5500 +5500 +20500 +21500 +20500 -10.25 V -0.50 V -0.50 V +0.50 V 0.0 mA 0.0 mA +3.5 mA +10.25 V +10.25 V +5.50 V +5.50 V +20.5 mA +21.5 mA +20.
Chapter 4: Using Your Output Module 21 Reset Output Or Hold Last Value On Fault (configuration bits 7 and 15) Use this bit to select how your module responds to a fault: • If you set this bit to 1, your module holds the output signal at its last value when it detects a fault. • If you set this bit to 0, your module resets the output signal to the power-up setting (0 V or 0 mA) when it detects a fault.
22 SLC 500™ Isolated Analog Output Modules and the low limit (output word 6) must be lower than the high limit (output word 7). Example – Suppose you have four valves with a ±10 V operating range, and you want to use the Engineering Units data format. For this application, you would use the following bit settings for the channel configuration bytes (output words 4 and 5): Address O:e.4 15 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 1 O:e.
Chapter 4: Using Your Output Module 23 User-Defined Scale For special applications, the 1746sc-INO4i and 1746sc-INO4vi output modules let you define a custom data format.
24 SLC 500™ Isolated Analog Output Modules Figure 5. Example relationship between output signal and channel data Data Value 9999 100 3.5 mA 20.5 mA Signal Value In the preceding example... Controlling Each Output Channel’s Signal S low = 3.5 Ulow = 100 Shigh = 20.5 Uhigh = 9999 ∆S = 17 ∆U = 9899 Output words 0 through 3 determine the output signal levels for channels 0 through 3, respectively. The output signal level depends on the output range and data format selected. Address O:e.
Chapter 4: Using Your Output Module Monitoring Each Output Channel The requested output data values are reflected in words 0 through 3 of the input image file (addresses I:e.0 through I:e.3). Whenever a channel is disabled, its data word is reset to zero. Address I:e.0 Checking Each Output Channel’s Configuration And Status 25 0 15 Channel 0 Data Word I:e.1 Channel 1 Data Word I:e.2 Channel 2 Data Word I:e.3 Channel 3 Data Word Words 4 through 7 of the input image file (addresses I:e.
SLC 500™ Isolated Analog Output Modules 26 Table 11. Channel status word details, Input Words 4 through 7 (I:e.4 through I:e.
Chapter 4: Using Your Output Module 27 The first 8 status bits reflect the settings in the channel configuration word. The remaining status bits flag the various errors that the module can detect. Output Data Limiting Enabled (status bit 8) This bit is set to one whenever output data limiting is properly enabled.
28 SLC 500™ Isolated Analog Output Modules Fatal Channel Error (status bit 15) This bit is set to one whenever your module detects a “non-recoverable” channel error, such as a software power-up failure due to corrupt hardware or malfunctioning software. You may be able to recover from this type of error by resetting the SLC 500 processor or cycling power to your module.
Chapter 5 Testing Your Module Read this chapter to prevent potential problems. This chapter covers: • inspecting your module • disconnecting prime movers • powering up • interpreting the LED indicators • interpreting I/O error codes • troubleshooting Before testing your module, test your SLC 500 system using the procedures described in your Allen-Bradley system Installation & Operation Manual.
30 SLC 500™ Isolated Analog Output Modules Disconnecting Prime Movers Before testing your module, ensure that machine motion will not occur: • Disconnect motor wires at the motor starter or the motor itself. This lets you test the operation of the starter coil, verifying that the output circuit is wired correctly and functioning. • Disconnect solenoids by disengaging the solenoid valves, leaving the coils connected.
Chapter 5: Testing Your Module Interpreting The LED Indicators 31 Your output module has 5 LEDs: 4 channel status LEDs (numbered 0–3 for channels 0–3, respectively) and 1 module status LED. Figure 6. LED block OUTPUT Channel 0 2 Status 1 3 Module Status Isolated Analog Use the following table to interpret the LEDs: Table 12. LED definition If the module And the channel status LED is… status LED is… Then... On On The channel is enabled.
SLC 500™ Isolated Analog Output Modules 32 Troubleshooting Figure 7. Problem resolution flowchart Check LEDs on module. Module Status LED off. Module Status LED on. Module fault condition. Check to see that module is seated properly in chassis. Cycle power. Is problem corrected? Yes End Channel Status LED(s) blinking. Channel Status LED(s) off. Channel Status LED(s) on. Fault condition. Channel is not enabled. Channel is enabled but not working. Check channel status word bits 9–15.
Chapter 6 Maintaining Your Module And Ensuring Safety Read this chapter to familiarize yourself with: • preventive maintenance • safety considerations The National Fire Protection Association (NFPA) recommends maintenance procedures for electrical equipment. Refer to article 70B of the NFPA for general safety-related work practices. Preventive Maintenance The printed circuit boards of your module must be protected from dirt, oil, moisture, and other airborne contaminants.
34 SLC 500™ Isolated Analog Output Modules Standing Clear Of Machinery – When troubleshooting a problem with any SLC 500 system, have all personnel remain clear of machinery. The problem may be intermittent, and the machine may move unexpectedly. Have someone ready to operate an emergency stop switch. ! CAUTION POSSIBLE EQUIPMENT OPERATION Never reach into a machine to actuate a switch.
Getting Technical Assistance If you need technical assistance, please review the information in Chapter 5, “Testing Your Module,” before calling your local distributor of Spectrum Controls. Note that your module contains electronic components which are susceptible to damage from electrostatic discharge (ESD). An electrostatic charge can accumulate on the surface of ordinary plastic wrapping or cushioning material.
The ENCOMPASS logo and SLC 500 are trademarks of Allen-Bradley Company, Inc. Copyright © 1997-2004 Spectrum Controls, Inc. All rights reserved. Printed in U.S.A. Specifications subject to change without notice. Publication 0300128-03 Rev. D May 2004 Corporate Headquarters Spectrum Controls Inc. P.O. Box 5533 Bellevue, Washington 98006 Fax: (425) 641-9473 Tel: (425) 746-9481 Web Site: http://www.industry.net/spectrum.controls E-mail: spectrum@spectrumctls.
