GE IC660BBA106 I/O Block Module

The GE IC660BBA106, also cataloged as the IC660BBA106 Current Source Analog Input Block, operates as a dedicated hardware component for 0-20 mA and 4-20 mA current loop processing within GE Fanuc Genius I/O network platforms. It directly interfaces up to 6 individually isolated analog transmitter channels to the serial bus without requiring a separate rack or external power supply module.

Hardware Specifications

Channel-to-Channel Isolation & 4-20 mA Loop Diagnostics

The IC660BBA106 provides 1500 V RMS channel-to-channel isolation across all 6 current source input circuits, shielding connected process instrumentation from high ground potential differences and transient noise. Operating with a 100 ohm input impedance and a resolution of 1 uA, the block continuously executes internal diagnostics for underrange, overrange, high alarm, low alarm, and open-wire conditions. Integrated circuit scaling and dual per-channel alarms allow raw process currents to be linearized and evaluated before diagnostic packets are transmitted across the Genius serial network.

Frequently Asked Questions

Q: What are the primary power supply input requirements for operating the IC660BBA106?

A: The block operates from a nominal source of 115 VAC (93-132 VAC range) or 125 VDC (105-145 VDC range), deriving both internal control power and loop excitation from this supply.

Q: Can channels on the IC660BBA106 be configured with custom update times?

A: Yes, input conversion times are user-selectable on a per-block basis ranging from 16.6 ms to 400 ms, allowing customization between rapid response times and enhanced noise filtering (-45 dB at 50/60 Hz).

Field Installation Guidelines

1. Disconnect and lockout all incoming power sources (115 VAC / 125 VDC) and field signal lines prior to installing or servicing the block.
2. Securely mount the unit to a vertical enclosure panel using standard mounting hardware to provide adequate heat dissipation and low-impedance frame grounding.
3. Wire signal loops using individual shielded twisted-pair cables for each 4-20 mA circuit. Ground signal shields strictly at one end to prevent ground loop noise from corrupting analog conversion.
4. Verify that total loop resistance does not exceed the maximum allowable impedance limits (1000 ohms for 0-20 mA; 800 ohms for 20-25 mA).
5. Apply operating power and verify that both "Unit OK" and "I/O Enabled" status LEDs illuminate steady ON, confirming successful self-test initialization and active communication.