ABB 07 SK 43 A R1 Binary Input Module

This module captures binary signals from field sensors and switches. The ABB 07 SK 43 A R1 provides 16 digital inputs for 24 V DC devices. It measures 180 mm in width and 120 mm in height. This unit weighs approximately 0.42 kg for rack mounting.

Technical Specifications Table

Parameter	Value
Product Model	ABB 07 SK 43 A R1
Brand	ABB
Category	Binary Input Module
Compatible Series	ABB Procontic PLC
Number of Inputs	16 channels
Input Type	24 V DC, sink/source (type 3)
Input Voltage Range	10 V DC to 30 V DC
Input Current	5 mA typical per channel
Input Delay	3 ms (on/off)
Dimensions (W x H x D)	180 mm x 120 mm x 50 mm
Weight	0.42 kg
Connector Type	1 x 20-pin screw terminal block
Internal Components	16 x optocouplers, 1 x filter circuit
Electrical Isolation	1500 V RMS between inputs and backplane
Energy Storage	None (real-time status only)
Input Filtering	Fixed 3 ms debounce
Operating Voltage	5 V DC (from backplane)
Power Consumption	80 mA maximum
LED Indicators	16 x green (input status), 1 x green (power)
Operating Temperature	0°C to 55°C

Internal Design and Signal Processing

This binary input module uses sixteen optocouplers for electrical isolation. Each optocoupler protects the backplane from field device surges. The ABB 07 SK 43 A R1 includes a fixed 3 ms filter for switch debouncing. This filter prevents false triggering from contact bounce or electrical noise. The module stores no input states after power loss. Consequently, the CPU reads fresh input values during each scan cycle. Green LEDs on the front panel show the real-time status of all 16 channels.

Installation and Wiring Guide

First, mount this module into any Procontic rack slot securely. Next, connect your 24 V DC supply common to the negative terminal. Then, wire your sensor outputs to the 16 input pins (channels 1-16). Each input accepts signals from limit switches, push buttons, or proximity sensors. Use shielded cables for long sensor runs exceeding 30 meters. The module automatically maps inputs to the CPU’s process image table. Green LEDs illuminate when the corresponding input energizes. This binary input module works with ABB Procontic CPU modules and expansion racks. Always verify the input voltage polarity matches your field device specifications.