version 4.7.2 – July 10th, 2022 Firmware version V2.1.7 and higher
EXXFIRE Installation and Service Manual 19
Electronics
Relay outputs
Status outputs from the system are established by relay contacts.
Relay contacts are rated to 2 A at 28 Vdc. This supports connection to most alarm panels, building
control systems and direct connection to DIN rail mounted relays for supplementary shut-down etc.
Table 5 Fault and Alarm relays
All relays are dual pole, dual throw, thus providing the installer with a flexible range of options for a
wide variety of applications. All outputs are duplicated, and isolated, and can be configured either
as NO or NC. The output channels for the Pre-Alarm and Alarm relays are offered as both a
changeover contact (Side A) and a Normally Open contact (Side B). The output channel for the Fault
relay is offered as both a changeover contact (Side A) and a Normally Closed contact (Side B). The
Side B contacts will be sufficient for most typical installations.
For example, the Side B contacts would typically be connected to the fire panel to indicate a fire
status. The Changeover contacts on Side A may be connected to a separate building management
system without any connectivity issues.
Wired Inputs
The following wired inputs are made available to the installer in this product:
- Power Cable to connect to mains power (100-240 VAC)
- Manual Activation Button to allow connection of a MAB to generate an Alarm and
subsequent gas release when the operator activates the MAB
- Door switch to allow connection of a door switch (to signal an opened cabinet door and to
inhibit gas release when the door of the cabinet is open) or a manual override switch (to
inhibit gas release when this switch is activated by an operator)
- Two RS485 bus interfaces to allow connection to other EXXFIRE®
750CNF/1500CNF/2250CNF systems; a maximum of 8 systems can be connected in a
daisy-chain configuration.
To Next Page
Loading...