Honeywell 621-1160 Digital Input Board 115VAC 16 Point PLC Module

Honeywell 621-1160 Digital Input Board 115VAC 16 Point PLC Module

Product Details:

Additional Information:

Description:

The interface printed circuit board contains the logic circuitry necessary to interface the processor to the rack 1/0 bus and the option cards. A bank of eight DIP switches enables or disables several functions including: FORCE, battery low start-up inhibit, on-line programming and data change functions. The DIP switch settings determine whether the processor will recognize or ignore processor rack output card faults. Clearing or freezing outputs at recognized card faults is also set at the Interface Board SWl. Refer to the APPENDIX for a complete listing of the Processor Module DIP switches and their functions.

The system's Output Status Data Table contained on the processor printed circuit board accommodates the status of 768 output locations. The output status of real I/0 is contained in locations 0-191 and control relay status in locations 192-767. Timer and counter presets and accumulated values plus other data is contained in the Register Table at addresses 4096-4351 which are 16 bits wide.

For proper operation in ungrounded AC control systems, this module requires an independent L1/+VDC power connection. While normal input functionality remains unchanged, this additional connection serves a critical purpose in systems with ground fault monitoring. It maintains circuit equilibrium to avoid false fault alerts that could disrupt operations.

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