Description
The 7706 is a plug-in module designed for diverse measurement and control applications. It features a multiplexer with 20 channels for 2-pole switching or 10 channels for 4-pole switching, complete with automatic cold junction compensation (CJC). Beyond its multiplexing capabilities, the module incorporates two analog output channels and 16 digital outputs. A notable feature is its event counter/totalizer, which enables monitoring and control of various system components while conducting mixed signal measurements. These components may include fixtures, limit switches, pass/fail indicators, external voltage sources, loads, door closures, and revolution counters. With its comprehensive feature set, the 7706 is particularly well-suited for temperature measurement applications using RTDs, thermistors, and thermocouples.
Key Features
- Incorporates 20 analog input channels with built-in automatic cold junction compensation for versatile measurement applications
- Features 16 channels dedicated to digital output functionality
- Equipped with dual analog output channels, each capable of ±12V and 5mA
- Robust capacity of 300V and 1A, with maximum power handling of 60W or 125VA
- Flexible architecture allows configuration as two separate multiplexer banks
- Integrated onboard memory for storing relay closure states
Model Overview
| Capabilities | Channels 1-20: Multiplex one of 20 2-pole or one of 10 4-pole signals into DMM Channels 21-25 are referenced to chassis ground Channels 21-22: 16 Digital Outputs Channels 23-24: Analog Voltage Output (2) Channels 25: Totalize Input |
|---|---|
| Contact Life (typ.) | >105 operations at max. signal level >108 operations no load (Minimum signal level 10mV, 10µA) |
| Contact Resistance | <1Ω at end of contact life |
|---|---|
| Contact Potential | <±2µV typical per contact, 3µV max (Minimum signal level 10mV, 10µA) |
| Offset Current | <100pA |
| Connector Type | Screw terminal, #20 AWG wire size |
| Isolation Between Any Two Terminals | >109 Ω, <100pF |
| Isolation Between Any Terminal and Earth | >109 Ω, <200pF |
| Cross Talk (10MHz, 50Ω Load) | <–35dB |
| Insertion Loss (50Ω Source, 50Ω Load) | <0.1dB below 1MHz <3dB below 2MHz |
| Common Mode Voltage | 300V between any terminal and chassis |
| Temperature Accuracy Using Internal CJC | 1.0°C (see mainframe specification for details) |
