ABB 1SAY11 0165R0003 Serial Coupling Module

This module connects AC500 PLCs to serial devices and networks. The ABB 1SAY11 0165R0003 provides a configurable interface for Modbus communication. It measures 45 mm in width and 70 mm in height. This unit weighs approximately 0.08 kg for DIN rail mounting.

Technical Specifications Table

Parameter	Value
Product Model	ABB 1SAY11 0165R0003
Brand	ABB
Category	Serial Coupling Module / Communication
Compatible Series	ABB AC500
Number of Ports	1
Port Type	RS485 (5-pin terminal), software configurable
Baud Rate Range	300 to 115200 bps
Protocols Supported	Modbus RTU, Modbus ASCII, ABB CP400
Dimensions (W x H x D)	45 mm x 70 mm x 55 mm
Weight	0.08 kg
Connector Type	1 x 5-pin removable terminal block
Internal Components	1 x UART, 1 x RS485 transceiver
Energy Storage	None (no battery required)
Electrical Isolation	500 V AC between port and backplane
Operating Voltage	5 V DC (from backplane)
Power Consumption	40 mA maximum
LED Indicators	1 x status (TX/RX activity)
Operating Temperature	0°C to 60°C

Internal Design and Communication Processing

This serial coupling module uses a UART for data handling. An RS485 transceiver converts logic levels to differential signals. The ABB 1SAY11 0165R0003 supports Modbus RTU and Modbus ASCII protocols. You configure the baud rate and protocol via PLC software. The module buffers incoming and outgoing data for the CPU. Consequently, this module enables reliable data exchange on RS485 networks.

Installation and Configuration Guide

First, mount this module onto a standard 35 mm DIN rail securely. Next, connect your serial devices to the 5-pin terminal block. Use shielded twisted-pair cable for the RS485 connection. Then, configure the baud rate and protocol using AC500 configuration software. The RS485 port supports long-distance networks up to 1200 meters. The module automatically buffers incoming messages for the CPU. A single LED indicator shows transmit and receive activity. This serial coupling module works with all AC500 CPU models including 1SAP140200R0160 and 1SAP140300R0160. Always terminate the RS485 line with proper resistors at both ends for long cable runs.