CT24 MCU
User Manual
14
9M02-7608-A001-EN
Version 2.0
The enclosure output interface to the controlled machine is handled by relays rated for typical machine interfaces.
Each relay has an adjacent ‘STATUS’ LED that illuminates when the relay is energized.
Note:
These relay
‘STATUS’ LEDs are only visible when the cover has been removed from the MCU.
Individual relay outputs are routed to the controlled equipment via a terminal strip.
When a fault condition is detected, the main contactor safety relays and all other outputs are disabled.
Note:
The CT24-9-ASO, CT24-17 and CT24-32
main contactor
safety relays KO-S and KO-M are each
protected with a fuse. The CT24-9 only has a single fuse. If the OCU is communicating with the MCU
and the machine Mainline Contactor fails to energize, these fuses should be checked for continuity.
Just like the OCU, MCUs use a removable 'TransKey' to define and enable the appropriate operating parameters.
Note:
OCU and MCU TransKeys must not be swapped. The OCU (transmitter) TransKey is black. The MCU
(receiver) TransKey is yellow. Swapping TransKeys will result in OCU/MCU fault indications and the
system will not operate.
4.1
Description
The receiver may be supplied with either an internal or external antenna. To ensure optimum communication, the
transmitter and the receiver should be installed with line of sight between the antennas of both units. Any
shielding by metallic constructions should be avoided.
If the receiver is installed inside a metallic enclosure, a detached antenna is required.
