version 4.7.2 – July 10th, 2022 Firmware version V2.1.7 and higher
EXXFIRE Installation and Service Manual 55
Electrical connections
4.5.1 Information and warnings
• The unit must be disconnected from mains power before opening the cover. The system
will not switch off by turning the power off, since it will continue operating on the back-up
battery.
• Access to connection terminals is made via the rear access panel (right-side panel at the
rear side), which can be removed by unscrewing the 6 screws, and lifting out the aluminum
cover (see Figure 45 below).
• Turn the battery switch on the PCB OFF. As a result the system will switch off. After
completion of the electrical installation this switch must be put in the ON position again.
• Connection is made through one of four cable glands. Each cable gland can accept a
multicore cable up to 8mm in diameter. The cables are connected to push-in connectors.
The push-in contacts for the power cable can accept wires up to 2.5mm
2.
.The contacts for
the relays, RS485 interfaces, Manual Activation Button and Door Switch can accept wires
up to 1.5mm
2
in each connection point.
Cables used for connecting multiple systems using the RS485 interface must be screened;
the screens should be appropriately connected (at one side of the cable only!!) to the shield
pin of the RS485 connector of the EXXFIE system in order to ensure EMC compliance. The
connector for the RS485 interfaces has a contact for connecting the screen of the cables
used for the RS485 connection. See section 5.6 that describes connecting of systems for
instructions how to shield these cables.
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