Configured for high-availability communication links within ControlLogix architectures, the Allen-Bradley 1757-SRC3, also cataloged as the 1757SRC3 Redundancy Module Cable, provides direct physical signal transmission and data synchronization across redundant controller nodes.

Model Identification and Suffix Structure

• Primary Catalog Number: 1757-SRC3
• Spare Designator: 1757SRC3
• Cable Length: 3 meters (9.84 feet)
• Connector Type: ST-type fiber-optic and 9-pin D-Sub male-to-male interfaces

Hardware Specifications

ControlNet and Backplane Communication Characteristics

The cable maintains strict deterministic network properties, supporting Profinet or EtherNet/IP deterministic networks and backplane bus communication velocity frameworks. It ensures low propagation delay across high-speed links, preserving system synchronization in redundant topologies. Firmware flash compatibility across connected nodes remains unaffected during data transmission.

Ordering Deliverables and Package Contents

• 1 x Allen-Bradley 1757-SRC3 Redundancy Module Cable assembly
• 2 x Protective dust caps for ST-type fiber-optic connectors
• 1 x Technical specification compliance sheet

Physical Routing and Field Installation Guidelines

• Cable Bending Radius: Maintain a minimum bend radius according to standard fiber-optic and shielded cable guidelines to prevent internal core fracture or signal attenuation.
• Strain Relief: Secure the cable near connector entry points using appropriate panel clamps to eliminate mechanical pull stress on the 9-pin D-Sub and ST terminals.
• Electromagnetic Separation: Route the redundancy cable away from high-voltage power conduits and variable frequency drive cables to minimize noise coupling.

Frequently Asked Questions

• What is the standard length of the 1757-SRC3 cable?

  The physical length of the cable assembly is 3 meters, equivalent to 9.84 feet.

• What types of connectors are integrated into this cable?

  It features ST-type fiber-optic connectors combined with 9-pin D-Sub male-to-male pin configurations.

• What is the maximum supported data rate?

  The assembly is engineered to handle data transmission speeds up to 100 Mbps.

• What is the characteristic impedance of the cabling?

  The impedance is rated at 100 ohm with an allowable manufacturing tolerance of plus or minus 10 percent.

• Can the cable operate in condensing humidity environments?

  Yes, the unit is rated for 0 to 100 percent relative humidity where condensation is permitted.

• What are the thermal limits for storage?

  Storage temperatures can safely range from -50 deg C to +85 deg C.

• What is the net weight of the hardware?

  The cable has an individual net weight of 0.2 kg, excluding packaging.

• Where is the manufacturing origin of this product?

  The unit is manufactured in the United States, with shipping originating from Xiamen, China.