CT24 MCU
User Manual
25
9M02-7608-A001-EN
Version 2.0
5.3
Interface
The actual wiring configuration depends on the work/configuration sheet supplied with your system. This section
provides general guidance of the selection of wire types for your application.
5.4
Interface Wiring
Before installing the system, you are advised to prepare an electrical wiring diagram that defines all electrical
interface connections between the system and the equipment being controlled. We also advise you to first read
the following topics of discussion. Additionally, you should locate and refer to the example mainline drawing
provided.
5.5
Safety Critical Interfaces
WARNING
UNLESS SPECIFIED, REMOTE CONTROL SYSTEMS ARE NOT DESIGNED TO INTERFACE
DIRECTLY TO SAFETY CRITICAL BISTABLE MAINTAINED FUNCTIONS (i.e., magnetic circuits,
vacuum circuits, grab, pump motors, fire suppression, etc.).
A PROPER INTERFACE TO SAFETY CRITICAL BISTABLE MAINTAINED FUNCTIONS SHALL
BE INSTALLED, IDEALLY USING A RELAY INTERFACE UNIT.
SHOULD CATTRON SYSTEMS BE INADVERTENTLY CONFIGURED TO INTERFACE
DIRECTLY WITH SAFETY CRITICAL BISTABLE MAINTAINED FUNCTIONS AT YOUR
OPERATING FACILITY, DAMAGE TO EQUIPMENT, SERIOUS INJURY OR DEATH TO
PERSONNEL MAY RESULT.
IT MUST BE FULLY UNDERSTOOD THAT CATTRON WILL NOT BE HELD LIABLE FOR
PERSONAL INJURY, DEATH, EQUIPMENT OR PROPERTY DAMAGE WHICH MAY ARISE
FROM IMPROPER CONFIGURATION OF YOUR REMOTE CONTROL SYSTEM.
When safety critical bistable maintained functions (i.e., electro-magnetic circuits, vacuum circuits, grab, pump
motors, fire suppression, etc.) are part of your controlled equipment, a proper interface must be installed between
the system and all such functions before operational use. We strongly recommend you use a relay interface unit.
5.6
Power and Control Cables Interface
The three possible options for installation of the power and control cabling are as follows:
1. Use the supplied Cable Gland (I/D 0.6875 inch) and install a high-performance multi-core cable
2. Protective conduit with individual wires
3. HAN style multi pole connector
It is important to note that the maximum current carrying capacity of the relay contacts is 5 A at 240 VAC resistive
load. When connected to contactors, the MCU relay contacts should be protected with suitably rated transient
suppression devices to maximize contact life expectancy; if these are not supplied as part of the MCU, they will
need to be fitted to the contactors being switched.
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