Allen-Bradley
Dual-Channel DH-485 Module 1756-DH485 Allen-Bradley
In stock, ready to ship
Manufacturer: Allen-Bradley
Product No.: 1756-DH485
Product Type: ControlLogix DH-485 Communication Module
Product Origin: USA
Payment: T/T
Weight: 1400g
Shipping port: Xiamen
Warranty: 12 months
Yes, we provide a 30-day money-back guarantee for all purchases.
Yes, all items come with a 12-month warranty from the date of shipment.
Product Overview
The Allen-Bradley 1756-DH485 is a ControlLogix dual-channel DH-485 communications module. It bridges ControlLogix systems to existing DH-485 networks for messaging with SLC 500 and other legacy devices.
Key Specs
- Catalog Number: 1756-DH485
- Channels: 2 independent DH-485 ports
- Communication rates: 9600 or 19200 bps
- Backplane current: 850 mA @ 5.1V DC, 1.7 mA @ 24V DC
- Power dissipation: 4.5 W
- Isolation: 50V continuous
- CIP connections: Up to 32
- Ports: Two 9-pin D-shell connectors
Why Choose This
- Enables seamless integration of legacy DH-485 devices
- Dual independent channels for flexible network design
- Supports both DH-485 and CIP messaging
- Alphanumeric display for local status monitoring
Common Questions
- Can it replace a 1747-KE module? It provides similar bridging functionality within ControlLogix.
- What cable is used? 1756-CP3 or equivalent for connection to AIC converters.
- Is it recommended for new systems? Primarily for existing DH-485 network expansion or migration.
Mounting Steps
- Install the module in any ControlLogix chassis slot.
- Connect each channel to the DH-485 network via AIC or direct cabling.
- Apply power and observe the alphanumeric display for node address and status.
- Configure link IDs and routing table using RSLinx and Studio 5000.
Buying Advice
- Use when migrating or expanding systems that still rely on DH-485.
- Plan unique link IDs for each channel.
- Verify network baud rate matches all connected devices.