Operator Unit
130--613
2
3648/130--613.DOC010102
Edition: March 11, 2005
1.1
The Construction of the Operator Unit
The Operator Unit is available in two versions -- desk-flush mounted, and with
angled fixing bracket.
The Operator Unit consists of a casing with a front panel.
All the electronics components required are accommodated inside the casing on
2 PCBs.
The front panel contains the display, 6 sealed membrane keys and a two-colour LED.
The PCBs are connected to the display unit via an optical fibre.
An alarm transmitter is mounted behind the front panel to transmit audible alarms.
The Operator Unit is designed for two redundancy CAN (CAN1 and CAN2) busses.
The Operator Unit is equipped with a PTC in the supply voltage line.
In the event of a fault (short circuit in the Operator Unit) this PTC reduces the current,
thus preventing further damage to the equipment.
There is no voltage fuse protection.