GE IC200ALG620-AA VersaMax RTD Module

Configured for precision temperature measurement and transducer interface in GE Fanuc / Emerson VersaMax PLC platforms, the GE Fanuc IC200ALG620-AA (IC200ALG620 Analog Input Module) provides direct physical/electrical execution. It handles 4 channels of 3-wire and 4-wire RTD or direct resistance inputs across Platinum, Copper, Nickel, and Nickel/Iron sensor types, delivering digitized temperature readings over the backplane bus. The module weighs 0.45 kg (1.00 lbs) and mounts onto standard VersaMax carrier bases.

Suffix Breakdown & Model Matrix

The part numbering structure defines module function, physical configuration, and revision levels within the VersaMax I/O platform:

• IC200: VersaMax I/O product line family hardware index.
• ALG: Analog I/O module family classification.
• 620: 4-channel RTD / Resistance input processing circuit designator.
• -AA: Initial hardware design revision build suffix.

Hardware Specifications

Backplane Bus Communication & Module Diagnostics

The module interface circuits link directly into the VersaMax carrier backplane, maintaining high backplane bus communication velocity while streaming converted 16-bit analog values to the CPU card. Dedicated Analog-to-Digital Converter (ADC) logic on each channel processes real-time sensor loops and reports hardware status via the OK and FLD PWR front-panel LEDs. Integrated flash firmware execution continuously runs channel diagnostics—detecting wire breaks, short circuits, or range faults—and passes alarm bits over the bus to preserve system control determinism.

Frequently Asked Questions

Q: What status do the front panel LED indicators communicate on the IC200ALG620-AA?

A: The FLD PWR LED indicates backplane and field logic power presence. The OK LED illuminates solid green during normal scan execution, flashes green in boot/update modes, and turns amber if diagnostic errors or module faults occur.

Q: How does line frequency affect the channel scan update time on this module?

A: Internal conversion filters update channels in approximately 210 ms per channel when configured for 60 Hz line power noise rejection, and approximately 230 ms per channel when set to 50 Hz.

Field Installation Guidelines

1. Power down the VersaMax carrier backplane supply before inserting or removing the IC200ALG620-AA module from its base.
2. Verify that 3-wire or 4-wire RTD field sensor cables use overall shielded twisted-pair wiring to prevent electromagnetic noise coupling.
3. Terminate signal cable shields directly at the grounding bar on the carrier unit baseplate; do not leave shield drain wires floating.
4. Keep maximum lead wire resistance below 5 Ohms per lead to maintain full system measurement accuracy and automatic lead compensation.
5. Confirm that the module latching pins click securely into the mounting carrier frame to maintain solid backplane pin contact.