ABB DO571 Digital Output Module S500-eCo

ABB DO571 1TNE968902R2202 – 8-Channel Relay Output Module for S500-eCo

Product Introduction

The ABB DO571 is a digital output module designed for the S500-eCo PLC family. It carries the ABB type designation DO571 and the order code 1TNE968902R2202. This module gives you 8 independent relay outputs for switching various loads.

Each output channel handles both AC and DC voltages. Specifically, it supports 24V DC, 24V AC, or 100-240V AC at 2A per channel. Therefore, you can directly control contactors, solenoids, small motors, and indicator lights without additional interface relays.

Furthermore, this module belongs to the AC500-eCo product line. It provides a cost-effective solution for small to medium-sized automation systems. You can easily integrate it into new or existing S500-eCo configurations.

Key Technical Specifications

The ABB DO571 uses relay output technology. This design provides electrical isolation between the PLC backplane and the field devices. Consequently, it offers excellent noise immunity and protection against voltage spikes.

• Number of outputs: 8 relay outputs

• Output voltage range: 24V DC/AC or 100-240V AC

• Output current: 2A per channel (resistive load)

• Protection rating: IP20 (for installation inside a control cabinet)

• Compatibility: AC500-eCo and S500-eCo systems

Additionally, the 1TNE968902R2202 module supports fast replacement. You can change it without disconnecting all field wiring because the terminals remain on the base.

Mechanical and Environmental Data

The ABB DO571 comes in a compact housing. Its small footprint saves valuable space inside your control panel.

• Width: 34 mm

• Height: 135 mm

• Depth: 75 mm

• Net weight: 0.12 kg

• Gross weight: 0.22 kg (including packaging)

Environmentally, this module complies with RoHS and WEEE directives. It is not classified as WEEE category equipment under EU regulations. The operating temperature range supports typical industrial environments from -20°C to +60°C.

Frequently Asked Questions (FAQ)

1. Can the ABB DO571 switch 230V AC motors directly?
Yes, the DO571 can switch small 230V AC motors up to 2A. However, for inductive loads like motors or contactors, always install external snubbers or varistors to protect the relay contacts.

2. What is the difference between DO571 and DO561?
The DO571 uses relay outputs (AC/DC, isolated). The DO561 uses transistor outputs (DC only, faster switching). Choose the 1TNE968902R2202 when you need AC switching or complete isolation.

3. How do I know if my S500-eCo system supports the DO571?
All S500-eCo CPU units and backplane bases support the ABB DO571. Check your CPU model; any AC500-eCo CPU works with this module.

4. Can I replace the DO571 while the system is running?
No, the DO571 does not support hot swap. You must power down the entire S500-eCo station before removing or inserting this module.

5. What happens if I exceed 2A on one output channel?
The 1TNE968902R2202 has no internal fuse per channel. Exceeding 2A may damage the relay contacts or cause welding. Always use an external fuse or circuit breaker rated at 2A or less.