ABB SDCS-PIN-3B driver board power board excitation board

Description

SDCS-PIN-3B The 24 VDC Mixed Input/Output Module with Electronic Short-Circuit Protection

(IC670MDD441) provides 10 discrete input circuits and 6 discrete output circuits sharing the same

common line. Each output point has electronic overcurrent and short circuit protection, and

generates a fault if either condition exists.

SDCS-PIN-3B An overcurrent or short-circuit fault on an output point causes the point to turn off. A module fault

is reported to the BIU.

Power Sources

Power for the module itself comes from the power supply in the Bus Interface Unit. An external

source of DC power must be provided for the switches that power the loads. The common line on

DC power is also the return for the input circuits.

LEDs

SDCS-PIN-3B Individual logic side LEDs indicate the presence of input voltage for each input point (green = ON).

A logic side bi-color LED for each output indicates that an output circuit is ON (green) or that a fault

condition has occurred (orange). The green LEDs will continue to operate when user power is not

present. If a point fault occurs, the point is automatically turned OFF. The fault is cleared by sending a

clear command from the HHM or by cycling power on either the backplane or the user side.

The PWR LED indicates logic and user power is available to operate the module (green = OK, OFF

= loss of power)

Intelligent processing for this module is performed by SDCS-PIN-3B the Bus Interface Unit or elsewhere in the

system. The module uses 16 discrete input data bits (two bytes) and 8 discrete output data bits (one

byte). The remaining 6 unused input data bits and 2 unused output data bits are not used A Bus

Interface Unit is required to exchange this I/O data in a byte format with the host and/or a local

processor.

Compatibility

This module must be used with a Genius Bus Interface Unit IC670GBI002 (revision 2.20) or later.

This module can be used with a Profibus Bus Interface Unit or Interbus-S Bus Interface Unit

version 2.20 or later.

Module Operation

After checking the Board ID, the Bus Interface Unit sends output data to the module and receives

input data from the module. Input, output, and Board ID data are in serial format. During

transmission, the module automatically loops output data back to the Bus Interface Unit for

verification. A serial to parallel conversion converts output SDCS-PIN-3B data into the parallel format needed by

the module. Conversely, a parallel to serial conversion converts input data into the serial format

needed by the BIU. Opto-isolators isolate the module’s inputs and outputs from the field. Power

from the external power supply is used to drive the FET switches that source current to the loads.

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