Siemens 6ES5484-8AA11 | Remote I/O Interface Module

The Siemens 6ES5484-8AA11 connects SIMATIC S5 controllers to distributed ET 100 I/O stations. This interface module (IM308) manages data exchange over short-distance coaxial cables. You can place remote I/O racks up to 100 meters from the central PLC. It handles periodic polling of digital and analog input signals efficiently. Consequently, you can reduce field wiring costs by locating I/O near the machinery.

Technical Specifications Overview

Parameter	Detailed Specification
Model	Siemens 6ES5484-8AA11
Category	SIMATIC S5 Remote I/O Interface Module (IM308)
Network Type	SINEC L1 (serial bus for distributed I/O)
Transmission Medium	Two-wire shielded coaxial cable
Maximum Distance	100 meters per segment
Number of Stations	Up to 8 remote I/O stations per interface
Number of I/O Points	128 digital inputs + 128 digital outputs (max)
Update Time	25 ms for full 256 I/O configuration
Interface	Screw terminal block (for bus cable)
Operating Voltage	5V DC from backplane (typical 350 mA)
External Supply	24V DC (for bus termination)
Dimensions	250 mm x 25 mm x 130 mm (single-width)
Weight	0.42 kg (420 grams)
Indicators	4 LEDs (power, run, bus fault, station fault)
Operating Temperature	0°C to 60°C

Functional Features and Remote I/O Capabilities

The Siemens 6ES5484-8AA11 acts as a master for SINEC L1 remote bus. You can connect this module to ET 100 and ET 200 stations. It automatically scans all configured remote racks in a cyclic sequence. Furthermore, the module stores the I/O image in its internal buffer memory.

The interface module includes a watchdog timer for bus monitoring. This timer triggers a safe state if communication fails with any remote station. Additionally, the LED indicators help you pinpoint faulty stations quickly. You can replace remote I/O modules without stopping the entire PLC system.

Installation and Configuration Steps

First, insert the Siemens 6ES5484-8AA11 into any S5 rack slot. Next, connect the SINEC L1 bus cable to the screw terminal block. Then, assign a unique station number to each remote rack using DIP switches. Finally, configure the I/O mapping using COM308 software on a programming device.

You must terminate both ends of the bus cable with 220-ohm resistors. The module requires proper grounding to avoid communication errors. Always use the specified coaxial cable type for distances beyond 50 meters. Furthermore, keep the bus cable separate from high-power AC wiring.

This remote I/O module works perfectly with Siemens 6ES5484-8AA11 and ET 100U stations. It reduces cable runs between the PLC cabinet and field devices. You can also mix digital and analog modules at each remote rack. The IM308 supports up to 16 I/O modules per station efficiently.