HollySys LK Series User Manual

Chapter 2 Overview
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Power
Module 1
External AC power supply 1
External AC power supply 2
Power
Module 2
Switch
PC
LK117/LK118 Backboard
Switch
IO
LK234
LK234
LK117/LK118 Backboard
IO
LK234
LK117/LK118 Backboard
IO
Frame
Frame
Internal bus in
backboard
Backboard
A B
Backboard
Internal bus in
backboard
LK220 LK240LK921
LK220 LK240LK921
(b)
Figure 2-3 Schematic Diagram of LK Large Universal Controller Redundant System (2)
2.3 Hardware Product List
The LK series large-scale PLC hardware products mainly include master control modules,
communication modules, I/O modules, backboards and power modules. Wherein, the I/O modules fall
into multiple types, as shown in Table 2-1.
Table 2-1 LK System Hardware Product List
Module Type
Model
Specifications
Protection
Key
Master controller
Unit
LK130
4-slot, local backboard, 235×166×44.3 mm, with 4 CPCI
pin interfaces
None
LK921
24V power switching module, input voltage: 12~30 VDC,
None

HollySys LK Series Specifications

General

Brand	HollySys
Model	LK Series
Category	Controller
Language	English