INSTALLATION INSTRUCTIONS
Identify gateway location
The Gateway should be mounted:
On a building with 5V DC availability and an Ethernet LAN connection.
Within 50m line-of-sight of the nearest Permasense WT100 sensor locations.
Away from a metal clad wall/roof.
The antenna should be on the top of the enclosure and be vertical.
The whole of the antenna should protrude above the top of a wall (if wall mounted).
At least 2.5m (8’) above solid obstacles in the space between the gateway and the
nearest sensor.
At least 1.5m (4.5’) from other wireless antennas or other Permasense Gateways to avoid
any possible ‘blinding’ effects.
Generally, the gateway should be mounted as high as possible to give the best wireless
range.
The gateways are supplied with a steel mounting plate but ideally the gateway can be mounted
on top of the sealed conduit carrying the cable.
Setting up the gateway enclosure outside
1. Feed the supplied 25m (80ft) 6-core screened cable through the mounted conduit into the
explosion-proof gateway enclosure.
2. Connect the cable to the GM20 gateway electronics module inside enclosure: The end of
the cable is labeled, as are the screw terminals on the GM20.
3. The shield of the cable should be connected to GND terminal of the GM20.
4. Check that the earthing cable inside the enclosure is connected from the earth screw
inside the enclosure to GND connection on the GM20.
5. Check that the antenna is connected between the gateway electronics module inside the
enclosure, using the supplied cable (BNC to SMA).
6. Use a ¾” NPT certified sealed conduit (NOT supplied) to seal the cable into the enclosure.
7. Mount the gateway electronics module onto the DIN rail inside the enclosure.
