ABB CL-LMR 18AC2 Series User Manual

Wiring with the logic relay
90
1SVC 440 795 M0100
Latching relay
The “latch” and “unlatch” relay functions are used in pairs.
The relay picks up when latched and remains in this state
until it is reset by the “unlatch” function.
:
Figure 44: Latching relay signal diagram
• Range A: The set coil and the reset coil are triggered at different
times
• Range B: Reset coil is triggered at the same time as the set coil
• Range C: Power supply switched off
Display in the logic relay:
• Q output relays:
SQ1to SQ8, RQ1to RQ8
(depending on type)
• M markers:
SM1to SM16, RM1to RM16
• (Text) D function relays: SD1 to SD8, RD1 to RD8
•S relays: SS1to SS8, RS1to RS8
Use each of the two relay functions S and R once only per relay.
If both coils are triggered at the same time, priority is given
to the coil further down in the circuit diagram.This is shown
in the above signal diagram in section B.
on
on
S
R
on
AB C
I1-I2----SQ1
I2-------RQ1
h
A latched relay is automatically switched off if the power
fails or if the device is in STOP mode. Exception: Retentive
coils retain signal 1 (a section “Retention (non-volatile
data storage)”, Page 221).

ABB CL-LMR 18AC2 Series Specifications

General

Rated Voltage	250 V AC
Category	Relays
Output	2 c/o (SPDT) contacts
Terminal Type	Screw Terminal
Contact Configuration	2 c/o (SPDT) contacts
Electrical Life	100, 000 operations
Mechanical Life	10, 000, 000 operations

Summary

Logic relay

Installation

Danger of electric shock

Highlights crucial safety rules to prevent electrical hazards during installation.

Mounting

Connecting the power supply

Explains the procedures for connecting AC and DC power supplies to the logic relay.

Connecting the inputs

Guides on wiring various types of digital and analog inputs to the logic relay.

Connecting outputs

Explains how to connect relay and transistor outputs to loads like contactors and motors.

Commissioning

Creating your first circuit diagram

Offers a step-by-step guide to wiring and creating a basic CL circuit diagram.

Testing the circuit diagram

Wiring with the logic relay

Analog value comparator/threshold value switch

Explains the use of analog comparators for threshold switching and comparing input values.

CL settings

Password protection

Covers setting up password protection for unauthorized access to the logic relay.

Setting date and time

Startup behaviour

Retention (non-volatile data storage)

Explains how actual values and settings are retained after power loss or device reset.

Inside the logic relay

Delay times for inputs and outputs

Monitoring of short-circuit/overload with CL-LST, CL-LMT and CL-LET

Details how to monitor outputs for short-circuits or overloads using internal inputs.

Saving and loading circuit diagrams

Memory module

CL-SOFT

CL-SOFT

Introduces the PC software for creating, storing, test and managing CL circuit diagrams.

What happens if …?

Messages from the CL system

Possible situations when creating circuit diagrams

Provides troubleshooting steps for common issues encountered during circuit diagram creation and operation.

Appendix

Technical data

Contains comprehensive technical specifications covering environmental, mechanical, and electrical data.