Crowcon Xgard Bright, Installation, Operation And Maintenance Instructions

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Installation
7
English
2.2 Mounting
Xgard Bright
should be installed at the designated location with the sensor
pointing down. This ensures that dust or water will not collect on the sensor
and stop gas entering the cell. Care should be taken when installing the
detector to avoid damaging the painted surface of the enclosure.
There are two M20x1.5 entry ports on the base. One entry port will be used
for power supply input during normal operation. Unused port will be blocked
by blind plug, or can be used to connect external alarm device or be used for
connecting devices to the multi drop communications. End user will only use
certifi ed cable gland for installation.
2.3 Internal Electrical Connections
Diagram 4:
Xgard Bright
internal electrical connections
B A B A
SINK
485
4-20mA
LOOP
SIG
–
+
SOURCE
Fault
Le
ve
l2
Lev
el1
SO
U
N
D
ER
O
U
T
NO NC
RT
NO NC
NO NC
Vmax=30V Wmax=3W
Xgard Bright
Gas Detector
Sounder Out
Power and Loop Connector
Production
use only
Production use
only
NOT USB!
Alarm level 2
Relay Output
Alarm Level 1
Relay Output
Alarm Level 1
NO/NC Jumper
Selection
SOURCE/SINK
Jumpers Fitted to
LHS = SINK, see
lengend on board
RS485 IN/OUT
or End of Line
Terminator
Alarm Level 2
NO/NC Jumper
Selection
Lower Board
Sensor
Connector
Lower Board
Programming
Connector
Fault NO/NC
Jumper Selection
Fault Relay
Output