ABB 1Q1SY | 1Q1SY-Cabled | 485 Fieldbus Cable Assembly

Description

Key Technical Specifications

Product Introduction

The ABB 1Q1SY-Cabled is a pre-assembled RS-485 fieldbus cable designed for the Modbus network infrastructure. It serves as a robust physical link for transmitting data between programmable logic controllers (PLCs), I/O racks, and HMIs within industrial automation systems.This 100-meter cable assembly features shielded twisted-pair conductors to ensure signal integrity over long distances and in electrically noisy environments. The termination fittings are specifically engineered for ABB hardware, ensuring a secure connection that minimizes electromagnetic interference (EMI) and signal reflection.

Installation & Configuration Guide

Phase 1: Preparation (5 min)

• Safety: Ensure the control panel is de-energized before handling cables.
• Inspection: Verify the cable length matches the required run. Check for physical damage to the jacket and fittings.
• Materials: Anti-static gloves, cable ties, and a cable marker.

Phase 2: Routing (10 min)

• Pathway: Route the cable away from high-voltage power cables and variable frequency drives (VFDs) to avoid noise coupling.
• Bending Radius: Maintain a minimum bend radius of 10 times the cable diameter (approx. 50mm) to prevent internal conductor damage.
• Grounding: Ensure the shield drain wire is connected to the grounding point at the master station to maintain EMI protection.

Phase 3: Termination (10 min)

• Connection: Match the colored wires to the corresponding terminals on the ABB I/O module (typically A/B/GND).
• Torque: Tighten terminal screws to 0.5–0.8 N·m to ensure a low-resistance connection.
• Sealing: If installed in an outdoor NEMA 4X enclosure, apply cable gland sealant to prevent moisture ingress.

Phase 4: Testing (5 min)

• Continuity: Use a multimeter to verify there are no shorts between the A and B wires or to ground.
• Insulation: Check insulation resistance >10 MΩ at 500V DC.
• Network: Power up the system and verify the communication status LED on the module is solid green.

Troubleshooting Quick Reference

Dimensions, Mounting & Wiring Notes

• Dimensions: 100 meters (328 feet) of cable length.
• Mounting: This is a cable assembly, not a plug-in module. It must be wired into the terminal blocks of the hardware.
• Wiring: The cable is shielded twisted pair. The A and B wires are twisted together, and the shield drain wire is braided around the outside.

FAQ

Q: Is this cable shielded?
A: Yes, the 1Q1SY-Cabled features foil shielding (F/UTP) to protect the RS-485 signals from electromagnetic interference in industrial environments.Q: Can I cut this cable to make it shorter?
A: No. The cable is terminated with specific fittings that require specialized crimping tools. Cutting the cable will damage the termination and render it unusable.Q: What is the maximum length for RS-485?
A: While the physical cable can be up to 1200 meters, ABB systems typically require a maximum of 1000 meters per segment. For runs over 1000 meters, a repeater or fiber optic converter is required.Q: Do I need a termination resistor?
A: Yes, you must place a 120 Ohm termination resistor at both ends of the RS-485 bus. The cable itself does not contain the resistor.Q: Is this the same as a standard Ethernet cable?
A: No. This is an RS-485 serial cable. It uses twisted-pair conductors but requires specific ABB termination fittings and operates at lower data rates than Ethernet.Q: What color are the wires?
A: The wires are typically colored according to the standard RS-485 convention: Blue (A), Yellow (B), and Green/Yellow (Ground). However, always verify with the terminal block markings on your specific ABB hardware.
ABB 1Q1SY-Cabled Cable