ABB RLM01 3BDZ000398R1 PROFIBUS Redundancy Link Module

ABB RLM01 3BDZ000398R1 PROFIBUS Redundancy Link Module      

Description

The three RS 485 interfaces of the module support all transmission rates specified in DIN 19245 for the

PROFIBUS from 9.6 kBit/s to 12 MBit/s. The module has repeater functionality, i.e., it regenerates the

signal shape and the amplitude of received data. RLM01 monitors all three lines A, B and M for activity and

error states. Detected errors are signalled by lit diodes on the front panel. The potential-free alarm contact

activated in parallel to this can be polled for diagnostic purposes by the process control system PCS or by a

programmable logic control PLC.

The first data coming in over line A or line B with a correct telegram start are routed to terminal M. With

simultaneity, either line A or line B is selected at random. Testing and selection is always based on the first

character. In the case of a telegram start with error on A, the control logic switches to the redundant line B.

The same procedure applies vice-versa for line B.

Data coming in over line M with a correct telegram start are routed in parallel to the two terminals A and B.

The test for data is always based on the first character. In the case of a telegram start with error, the control

logic does not output any data to A and B.

Either a single or a redundant power supply with 24 VDC is possible. The distribution of load across L1+

and L2+ is based on the level of the voltages applied. If a voltage source fails, the switch to the redundant

supply source is made without interruption. A monitoring logic circuit tests whether both voltages are

present.

RLM01 is certified for applications on ships and maritime systems by the Germanic Lloyd (GL). To keep the

increased requirements regarding EMV and overvoltages RLM01 needs - depend upon supply (single /

redundant) - one or two "24 VDC power pack filter (Surge)".

Features

■ Conversion of one simple, nonredundant PROFIBUS line into two reciprocally redundant lines A/B

■ Use on PROFIBUS DP/FMS lines

■ Automatic line selection

■ Transmission rate 9.6 kBit/s .... 12 MBit/s

■ Monitoring of communication

■ Repeater functionality

■ Redundant power supply

■ Status and error display

■ Monitoring of the power supply

■ Potential-free alarm contact

■ Simple assembly on DIN mounting rail

■ CE,UL/CSA and Germanischer Lloyd certified 

Technical Specifications