Unit installation

…always there

Important:

THE ALARM SYSTEM MUST BE TOTALLY POWERED DOWN (SWITCH OFF

MAINS AND DISCONNECT THE BATTERY) BEFORE INSTALLATION CAN

COMMENCE.

For certain alarm panels, the 3GSTU-PLI can be directly mounted using the

"Plug-in" connections available. Locate it on the two 8-way connectors on the

control panel circuit board. Take care to align the pins to the sockets on the

board correctly: if they are out of alignment, damage may occur.

For other alarm panels and installations where “Plug-in” connections are not

available, the unit can be wired “stand-alone”. Fix the STU to the inside of the

control panel using the adhesive mounting pads provided after ensuring that the

control panel and STU base are free from dust or grease.

Care must be taken when connecting wires to the terminal blocks TB1,2,3,4 and

TB5. The small screws can be easily damaged by over-tightening. Wiring

connected to terminal blocks should be kept as short as possible to reduce the

likelihood of radio frequency (RF) pickup.

Connecting the Telephone Line and Earth

The TNV circuit cover of the STU should not be removed whilst the unit is

connected to the PSTN or Private Wire network.

Remove the TNV circuit cover from the STU.

Use two core telephone cable (type: 1/0.5 mm CW1308) that is not yet

connected to the PSTN or Private Wire (PW) network. Strip back the insulation

so that 5 mm of wire conductor is exposed. Position the cable in the plastic base

as shown on page 12. Connect one core to the terminal marked A and the other

to the terminal marked B.

Strip back an earth cable (green/yellow, core area greater than 1mm²) so that

5mm of wire is exposed. Position the cable in the plastic base as shown on page

12 and connect it to the terminal marked