ABB RLM02 Redundancy Link Module

SKU: RLM02

Manufacturer: ABB
Product No.: RLM02
Condition：In stock
Product Type: Redundancy Link Module
Product Origin: USA
Payment:T/T, Western Union
Weight: 330g
Shipping port: Xiamen
Warranty: 12 months

Overview

The ABB RLM02 Redundancy Link Module enhances reliability in PROFIBUS DP/FMS networks by converting a single, non-redundant line into two reciprocally redundant lines (A/B). It operates at transmission rates between 9.6 kbit/s and 12 Mbit/s, featuring automatic line selection and comprehensive monitoring capabilities.

Benefits

Conversion: Transforms one simple, non-redundant PROFIBUS line into two reciprocally redundant lines A/B
Compatibility: Designed for use on PROFIBUS DP/FMS lines
Automatic Line Selection: Ensures seamless communication
Transmission Rate: 9.6 kbit/s to 12 Mbit/s
Communication Monitoring: Enables real-time performance oversight
Repeater Functionality: Extends network reach
Redundant Power Supply: Enhances system reliability
Status and Error Display: Provides visual feedback
Power Supply Monitoring: Ensures consistent operation
Alarm Contact: Offers potential-free alerts
Easy Installation: Simple assembly on DIN mounting rail

Features

Positioning: Can be installed directly after a master, before a bus segment with multiple slaves, or before an individual slave
Redundant Couplers: PROFIBUS stations with redundant couplers [K] can connect directly to the PROFIBUS set redundant by RLM02
Single Interface Stations: Can be assigned to either the A or B line
Capacity: Each RLM02 interface supports up to 31 PROFIBUS stations
Expansion: Using repeaters [R] and media converters [O/E] allows for increased length and number of PROFIBUS stations

Connectors / Terminals

Description:
- A: Redundant PROFIBUS lines, 9-pin Sub-D connector, Open
- B: Non-redundant PROFIBUS line
- M: Power supply (L1+, L2+, M), alarm (F1, F2), and earth connection (E), 8-pole terminal strips

Adjustment and Indication

Description:
- Act: Bus activity on line A, B, or M (yellow LED)
- Err: Error on line A, B, or M (red LED)
- Power: Power supply okay (green LED)
- Baud Rate: Rotary switch for baud rate setting (9.6 kBd ... 12 MBd)
- Reset: Button for transmission rate activation

Technical Data

Baud Rate Settings

Switch Setting: 0 1 2 3 4 5 6 7 8 9
Baud Rate: 12 6 3 1.5 500 187.5 93.75 19.2 9.6 No Function
Unit: MBd or MBit/s, kBd or kbit/s

Serial Interfaces

Connections: A, B, and M
Transmission Rate: 9.6 kBit/s to 12 MBit/s
Type: RS 485
Connection: 9-pin Sub-D connector
Electrical Isolation: To IEC/EN 61010-1, functionally isolating
Test Voltage: 500 Veff
Device Protection Class: IP 20

Line Length Restriction

Master to M: 50 m
M to Slave: 50 m
A/B to A/B: According to PROFIBUS specification

Data Telegram Delay

A/B to M: 11 Bit times [μs] + 0.6 μs
M to A/B: 4 Bit times [μs] + 0.6 μs

Power Supply

Operating Voltage: 24 VDC (+20 ... +33 V)
Power Consumption: 120 mA typically at 24 V
Power Loss: Approx. 3.6 W
Connection: 8-pin terminal strip
Wire Cross Section: 0.14 ... 1.5 mm²

Ambient Conditions

Operating Temperature: 0 ... 55°C
Transport / Storage Temperature: -30 ... 85°C
Relative Humidity: Max. 75%, non-condensing in operation
Altitude: Up to 2000 m

Alarm Contact

Function: Normally closed / Open in case of error
Switching Voltage: < 60 VDC
Switching Current: Max. 1 A

Design

Dimensions: 134 x 56 x 70 mm (H x W x D)
Weight: Approx. 330 g
Attachment: Mounting rail, 35 mm
Protection: IP 20 (indoor use)

Certification

Corrosive Atmosphere: G3 (ISA-S71.04 Severity level: G3)
USA: UL-listed
Canada: CSA
Europe: CE
Ships and Maritime Systems: DNV GL, (location class)

Accessories

To Be Ordered Separately: 3 PROFIBUS connectors

Order and Warranty Information

Terms of Purchase and Returns

Detailed guidelines on minimum order quantity, delivery times, payment options, warranty, and return policies.

We gladly accept bulk orders, with a minimum order quantity of just one unit.

Upon request, we can provide all necessary documents, including Certificates of Origin/Conformance and other required export paperwork.

We accept 100% T/T (Telegraphic Transfer) payment before shipping. For items with lead times, a 30% deposit is required upfront, with the remaining 70% payable before shipment. For RMB transfers, please contact us if you have an agent in China.

All new and original items come with a standard one-year warranty. For extended warranty options, feel free to contact us for pricing details.

We prioritize your satisfaction. If you need to return an item, it must be done within 30 days of purchase. The product must be unused, unopened, and in its original packaging, including all accessories. Refunds will be processed within 5-7 business days of receiving the return. Please note, shipping and handling charges are non-refundable.

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