Intelligent platforms IC200UEX736-D IC200UEX736D IC2OOUEX736-D

GE Fanuc IC200UEX736-D | VersaMax Micro RTD Expansion Module — Pt100 / −100 to +600°C / 2/3-Wire / 2 Analog Outputs / Revision D

RTD and Analogue Output Expansion in One VersaMax Micro Module

The IC200UEX736-D is the RTD expansion module for the VersaMax Micro PLC platform, providing Pt100 resistance temperature detector (RTD) measurement capability alongside two analogue outputs — all in the compact snap-on expansion module format that characterises the VersaMax Micro range.

Pt100 RTD sensors are the standard in industrial process temperature measurement — found in every sector from food processing to chemical plants to HVAC systems. The Pt100 designation means the sensor has a nominal resistance of 100 ohms at 0°C, with resistance increasing linearly with temperature. The IC200UEX736-D reads this resistance change and converts it to a temperature value accessible in the VersaMax Micro PLC programme.

The temperature span covered — −100°C to +600°C — covers most standard industrial process temperature measurement requirements. Low-temperature applications such as cold storage, cryogenic process monitoring, and refrigeration systems are covered at the lower end. High-temperature applications such as furnace monitoring, heat treatment processes, and steam system temperatures are covered toward the upper end of the range.

The two-output section delivers both voltage and current analogue outputs. Voltage outputs drive analogue setpoint inputs on speed controllers, temperature setpoint inputs on proportional heaters, or any voltage-input process device. Current outputs (typically 4–20mA) serve the standard industrial current loop devices — proportional valves, variable speed drives, and process transmitters — where the current loop's immunity to cable resistance error provides reliable signal transmission over longer wiring distances.

Key Specifications

RTD Wiring — 2-Wire vs 3-Wire

The IC200UEX736-D supports both 2-wire and 3-wire Pt100 RTD connections:

2-wire: The sensor connects via two wires. Cable resistance adds directly to the measured sensor resistance, introducing a temperature reading error proportional to the cable length and resistance. Suitable for short cable runs where measurement accuracy requirements allow for this error.

3-wire: A third wire allows the module to measure and compensate for the cable resistance. The third wire follows the same path as the signal wires, measuring the cable resistance, and the module subtracts this from the total resistance measurement. This dramatically reduces the cable resistance error, making 3-wire suitable for longer cable runs where 2-wire would introduce unacceptable temperature reading offset.

FAQ

Q1: How many IC200UEX736-D modules can connect to one VersaMax Micro PLC?

The VersaMax Micro platform supports a maximum of 4 expansion modules total. The IC200UEX736-D counts as one expansion module. If RTD expansion is needed alongside other expansion types (discrete I/O, analogue I/O), all expansion modules share the 4-module maximum. Plan the expansion configuration within this limit before specifying multiple expansion module types.

Q2: What Pt100 accuracy does the IC200UEX736-D provide?

Pt100 RTD measurement accuracy in practice depends on the module's ADC resolution, the RTD class (DIN class A or class B), and the cable quality. The 3-wire wiring option eliminates cable resistance error; 2-wire adds cable resistance error proportional to cable length. Use class A Pt100 sensors and 3-wire wiring for the best accuracy in demanding temperature measurement applications.

Q3: Can the IC200UEX736-D measure Pt1000 or Ni100 RTDs, or only Pt100?

The IC200UEX736-D is specified for Pt100 RTD sensors. Pt1000 and Ni100 RTDs have different resistance characteristics and are not compatible with a module calibrated for Pt100. For Pt1000 or other RTD types, verify whether the VersaMax Micro platform offers an alternative expansion module that supports the required sensor type.

Q4: What connection cable is required to attach the IC200UEX736-D to the VersaMax Micro PLC?

VersaMax Micro expansion modules connect to the base PLC unit via a short expansion cable included with the module (typically IC200CBL501 or equivalent). The cable connects the expansion module to the last module in the expansion chain or directly to the base PLC's expansion port. Confirm the cable part number from the module's documentation.

Q5: Where is the IC200UEX736-D sourced?

Through Emerson's Automation Solutions product supply (formerly GE Fanuc) and through the VersaMax Micro aftermarket — industrial automation distributors and tested surplus suppliers. The -D revision identifies the hardware generation; confirm the D revision specifically from the installed module if revision matching is required for a certified installation replacement.