I/O modules

Core Functionality of This RTD Board

The GE IS200VRTDH1DAC interfaces directly with resistive temperature detectors. This board accepts up to six independent 3-wire RTD inputs. It converts each resistance reading into a digital temperature value. Consequently, the system monitors thermal conditions across turbines or generators.

Physical Dimensions and Board Layout

This RTD board measures 265 mm in total length. Its width reaches 185 mm for a full-size VME form factor. The board thickness stands at 18 mm including component height. You will find 312 discrete components on the PCB assembly. These include precision resistors, operational amplifiers, and isolation transformers. The GE IS200VRTDH1DAC weighs approximately 480 grams for robust handling.

Connectivity and Terminal Interfaces

A single 50-pin right-angle header connects to the VME backplane. Additionally, three 10-pin latching connectors serve the field RTD wiring. Each channel uses dedicated positive, negative, and sense terminals. This design eliminates wire resistance errors for 3-wire sensors. The board also provides one 4-pin power input header.

Power Characteristics and Energy Storage

The GE IS200VRTDH1DAC draws 250 mA from a 5 V DC logic supply. It also requires 120 mA from a separate ±15 V DC analog rail. The board incorporates six 47 µF electrolytic capacitors for local decoupling. However, these capacitors do not store user data or calibration values. Total power dissipation reaches 2.8 W under normal operation. Hence, the module does not need forced-air cooling.

Component Count and Environmental Data

Installation and Compatibility Notes

You must install this board in a Mark VIe VME rack slot. The module works exclusively with 100 Ω platinum RTD sensors. Always connect the sense wire directly to the RTD element. Then, verify that no external voltage applies to the input terminals. The board operates reliably from -30°C to +65°C ambient temperature.

Details