GE IC200ALG620-CB VersaMax Analog Input RTD Module

Configured for precision temperature acquisition in GE VersaMax PLC platforms, the GE IC200ALG620-CB (IC200ALG620 Analog Input RTD Module) provides direct physical/electrical execution. This 4-channel module processes resistance inputs from platinum, copper, nickel, and nickel/iron RTD elements, converting physical resistance values into 15-bit plus sign digital data for controller execution.

Hardware Specifications

Backplane Bus Communication Velocity & Firmware Integrity

The IC200ALG620-CB communicates across the VersaMax backplane bus drawing up to 125 mA at 5 VDC and 125 mA at 3.3 VDC to drive its 15-bit plus sign analog-to-digital processing engine. Channel update sweep times are maintained at approximately 210 ms (at 60 Hz) or 230 ms (at 50 Hz) per channel, ensuring synchronized data framing into CPU input registers. Maintaining firmware flash compatibility across the host CPU or Network Interface Unit (NIU) eliminates backplane bus contention, jitter, and frame transmission errors during continuous temperature scan routines.

Frequently Asked Questions

Q: What does an amber "OK" LED status indicate on the IC200ALG620-CB?

A: An amber "OK" LED indicates an active module fault condition, such as an internal diagnostic failure, open sensor wire detection, or improper channel configuration.

Q: How do line rejection frequency settings affect the channel update rates of the IC200ALG620-CB?

A: Setting line noise rejection to 60 Hz results in an update rate of approximately 210 ms per channel, whereas setting it to 50 Hz increases the filtering period to approximately 230 ms per channel.

Field Installation Guidelines

1. Completely de-energize the VersaMax backplane power supply and external field wiring power before inserting or removing the module.
2. Align the IC200ALG620-CB housing with the carrier base guide slots and push firmly until the module latches securely to the backplane base.
3. Connect RTD lead wires to the carrier terminal assembly, taking care to follow the designated terminal pinout for 3-wire or 4-wire RTD wiring configurations.
4. Use shielded, twisted-pair cabling for all RTD runs to minimize high-frequency noise pickup, grounding the shield at one point on the cabinet enclosure ground bus.
5. Restore backplane power and verify that the "OK" status LED turns steady green before starting system temperature scanning.