Allen Bradley 1747-DCM SLC 500 Direct Communication Module

Overview

The Allen Bradley 1747-DCM is a Direct Communication Module (DCM) designed for the SLC 500 series of programmable logic controllers. It enables reliable, high-speed data exchange between the controller and external devices, supporting industrial automation processes with minimal setup and configuration.

General Information

Part Number: 1747-DCM

Manufacturer: Allen Bradley

Brand / Country of Origin: Allen Bradley / USA

Series: SLC 500

Type: Direct Communication Module

Mounting: Din rail or chassis installation within SLC 500 racks

Technology: Serial communication, controller-to-controller, and device interfacing

Power Specifications

Supply Voltage: 5 V DC (provided via the SLC 500 backplane)

Power Consumption: ≤ 2 W

Input: Powered directly from the SLC 500 rack

Protection: Surge protection and short-circuit resilience

Indicators: LEDs for power and communication activity

Communication & Interface

Serial Port: RS-232 or RS-422/485 compatible

Data Rate: Up to 115.2 kbps, supporting multiple network topologies

Protocol Support: SLC 500 proprietary protocols, DF1, DH-485

Diagnostics: Real-time communication monitoring, error detection, and fault reporting

Operator Interface: LED indicators and DIP switch configuration

Reset Features: Supports both controller-initiated and module-initiated reset

Environmental

Operating Temperature: 0 to +60 °C

Storage Temperature: −20 to +85 °C

Humidity: Up to 95% RH, non-condensing

Protection Rating: IP20 (suitable for standard industrial cabinets)

Vibration / Shock: Built to endure typical industrial conditions

Dimensions & Weight

Dimensions (L × W × H): 144.5 × 34.6 × 130.18 mm

Weight: 0.45 kg

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