1756-DHRIO Communication Module Allen-Bradley

Allen-Bradley 1756-DHRIO ControlLogix Communication Module

Technical Specifications

• Manufacturer and Brand: Allen-Bradley
• Model Number: 1756-DHRIO
• Series: ControlLogix
• Module Type: Data Highway/Remote I-O Communication Interface
• Communication Speeds: 57.6 Kbaud, 115.2 Kbaud, 230.4 Kbaud
• Backplane Current: 1.7 mA at 5V, 850 mA at 24V
• Maximum Power Dissipation: 4.5 Watts
• Operating Temperature: 0-60 °C (32-140 °F)
• Slot Width: 1
• Weight: 0.64 pounds (0.293 kilograms)

Network Setup and Installation

• Always set the network type switches for each channel before installation.
• Use recommended Belden 89463 twinaxial cable for reliable performance.
• Install a 150-Ohm terminating resistor for 57.6/115.2 Kbaud networks.
• Install an 82-Ohm terminating resistor for 230.4 Kbaud networks.
• Place these resistors at the first and last node of your daisy-chain network.
• The module connector uses Phoenix MVSTBR2.5/3-ST BK AU terminals.

Communication and Protocol Support

• The module acts as a scanner for Remote I/O networks.
• It enables messaging with PLC-5, SLC, and other ControlLogix controllers.
• This interface supports connections to Flex I/O and POINT I/O systems.
• You can transfer analog, digital, and block data without message instructions.
• The system supports up to 32 simultaneous Logix connections for data exchange.

Frequently Asked Questions (FAQ)

What is the condition of the 1756-DHRIO module?

• We stock only brand new, original Allen-Bradley modules. Every unit comes in its factory-sealed packaging.

How quickly can you ship the module?

• We process orders and ship from our warehouse within 5 business days. You will receive a tracking number as soon as it ships.

Which logistics carriers do you use?

• We ship globally using reliable express carriers like DHL, FedEx, and UPS. This ensures you receive your order quickly and safely.

What is your returns policy?

• We offer a 30-day return policy for all our products. Please contact our sales team to initiate a return request.

What are the supported network speeds?

• The module supports three baud rates: 57.6K, 115.2K, and 230.4K. The maximum speed depends on your total network cable length.

Do I need special cables for the DH+ network?

• Yes, we recommend using Belden 89463 or an equivalent twinaxial cable. Proper cabling is crucial for stable network communication.

Can this module communicate with older PLCs?

• Absolutely. The 1756-DHRIO is designed to bridge ControlLogix systems with older devices like PLC-5 and SLC controllers using DH+.

For pricing and availability, please contact: sales@nex-auto.com