Specifications

CR3000 Overview
OV1.1.7 12 Volt Outputs
The 12V terminals provide a constant unregulated 12 volts for powering
external devices such as multiplexers and SDM modules.
The 12V is common with pin 8 on the CS I/O pin connector.
OV1.1.8 5V Output
The 5 V (±4.0%) output is commonly used to power peripherals such as the
QD1 Incremental Encoder Interface, AVW1 or AVW4 Vibrating Wire
Interface.
The 5 V output is common with pin 1 on the CS I/O 9 pin connector; 200 mA
is the maximum combined current output.
OV1.1.9 Switched Voltage Excitation (VX)
Four switched excitation channels provide precision programmable voltages
within the ±5 Volt range for bridge measurements. Each analog output will
provide up to 25 mA between ±5.0 V.
OV1.1.10 Switched Current Excitation (IX)
Three switched current channels provide precision programmable current
output within the ±2.5 mA range for bridge measurements.
OV1.1.11 Continuous Analog Outputs (CAO)
Two CAO channels supply continuous output voltages in the ±5 Volt range under
program control, for use with strip charts, x-y plotters, or proportional controllers.
OV1.1.12 Digital I/O (C1-8)
There are 8 digital Input/Output channels (0 V low, 5 V high) for frequency
measurement, pulse counting, digital control, triggering, and SDI-12 sensors.
In addition to the individual channel digital I/O functions, there are several
groups of channels that can be used for other functions.
The Synchronous Device for Measurement (SDM) connections SDM-C1,
SDM-C2, and SDM-C3 along with the 12 volt and ground terminals are used
to connect SDM sensors and peripherals.
The COM groupings can be used for serial I/O communication and Intelligent
Sensor input.
OV1.1.13 Pulse Inputs (P1-4)
Four Pulse input channels can count pulses from high-level (5 V square wave),
switch closure, or low-level A/C signals.
OV-4