Mounting; Internal Electrical Connections - Crowcon Xgard Bright Bedienungsanleitung

Xgard Bright
The placement of sensors should be determined following advice of experts having
specialist knowledge of gas dispersion, the plant processing equipment as well as
safety and engineering issues. The agreement reached on the locations of sensors
should be recorded.

3.3 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 enter-
ing 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 certified cable gland for installation.
Refer to the dimension diagram, diagram 4, for mounting hole details.

3.4 Internal Electrical Connections

Sounder Out
Alarm Level 1
Relay Output
Alarm Level 1
Normally Open
or Normally
Closed Jumper
Selection
Production
use only
Alarm level 2
Relay Output
Alarm Level 2
NO/NC Jumper
Selection
Diagram 6: Xgard Bright internal electrical connections
Power and Loop Connector
Vmax=30V Wmax=3W
Xgard Bright
Fault NO/NC
Jumper Selection
Gas Detector
Lower Board
Sensor
Connector
SOURCE/SINK
Jumpers Fitted to
LHS = SINK, see
lengend on board
Production use
only
NOT USB!
RS485 IN/OUT
or End of Line
Terminator
Fault Relay
Output
Lower Board
Programming
Connector
17