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MN301535 Rev A
Introduction / Table of Contents
Step One
The LC90 & LC92 Series Controllers are isolation level controllers designed for use with intrinsically safe
devices. The controller family is offered in three configurations for pump and valve control. The LC90 Series
features a single 10A SPDT relay output and can accept one level sensor as an input. The LC92 Series
features both a single 10A SPDT and a single 10A Latching SPDT relay. This package allows for a three-input
system that can perform an automatic operations (fill or empty) and an alarm operation (high or low). The
LC92 series can also be a two-input controller that can perform dual alarms (2-high, 2-low or 1-high, 1-low).
Package either controller series with level switch sensors and fittings.
FEATURES
Fail-Safe relay control of pumps, valves or alarms with a 0.15 to 60 second delay
Polypropylene enclosure can be DIN rail mounted or back panel mounted.
Easy setup with LED indicators for sensor(s), power and relay status.
Invert switch changes relay state from NO to NC without rewiring.
AC
powered
TABLE OF CONTENTS
Specifications / Dimensions: ................................................................................................................................. 3
Specifications:
........................................................................................................................................... 3
Dimensions:
.............................................................................................................................................. 3
Control
Diagram:
....................................................................................................................................... 4
Control
Label:
............................................................................................................................................ 4
Safety Precautions: ............................................................................................................................................... 5
Make a Fail-Safe System: ......................................................................................................................... 6
Getting Started: ..................................................................................................................................................... 7
Components:
............................................................................................................................................. 7
Features of the Single Input High or Low Alarm Relay: ............................................................................ 8
Features of the Dual Input Automation Fill/Empty Relay: ......................................................................... 9
Guide to Controls: ................................................................................................................................... 10
Wiring: ................................................................................................................................................................ 11
Connecting Switches to Input Terminals: ................................................................................................ 11
LED
Indication:
........................................................................................................................................ 11
Relay and Power Terminals: ................................................................................................................... 12
VAC Power Input Wiring: ........................................................................................................................ 12
Changing from 120 to 240 VAC .............................................................................................................. 12
Installation ........................................................................................................................................................... 13
Application Exmaples ......................................................................................................................................... 14
Low Level Alarm: .................................................................................................................................... 14
High Level Alarm: .................................................................................................................................... 14
Pump
Protection:
.................................................................................................................................... 15
Automatic
Fill:
......................................................................................................................................... 15
Automatic
Empty:
.................................................................................................................................... 16
Leak
Detection:
....................................................................................................................................... 16
Appendix ............................................................................................................................................................. 17
Relay Logic – Automatic Filling and Emptying: ....................................................................................... 17
Relay Logic – Independent Relays: ........................................................................................................ 17
Latch – ON vs. OFF: ............................................................................................................................... 18
Controller
Logic
....................................................................................................................................... 18
Troubleshooting
...................................................................................................................................... 19
Warranty ............................................................................................................................................................. 20