ADEMCO Accord Installationshandbuch PDF herunterladen (Seite 20)

Connecting Power to the System

Mains Power

Mains power for the system is 230 V a.c. 50 Hz (a 24-hour unswitched source). The

mains cable should be brought into the control cabinet through the mains entry point

under the mains terminal block and firmly secured using the mains clamp and screws

provided in the ancillaries pack. The mains cable should be wired to the mains input

terminal block as illustrated in figure 2.8.

Note: No connections should be made to the Earth terminal on the mains terminal

block.

If the cable is three core the green/yellow earth core should be trimmed back to the

outer sheath such that none is visible.

The secondary side of the mains transformer should be connected to the two terminals

on the control panel PCB marked AC.

Example: Do not apply power to the transformer at this point.

Stand-by Battery

The system can be protected against mains failure by the addition of a Stand-by

battery with a maximum rating of 7.2 Ahr.

Calculate the system quiescent current draw and multiply this by the number of hours

required for stand-by cover, for example, 200 mA × 12 hours = 2.4 Ahr. Install the

next battery size up, in this case 2.8 Ahr.

Connecting the Accord XPC to the PSTN

The Telecommunications Network Voltage (TNV) port (terminals A and B on TB5)

must be permanently connected (hard-wired) to the PSTN via a BT master socket,

refer to figure 2.9.

Note: If the BT master socket is the newer type (NTE5/CTE5), then the connection can

be carried out by the installation engineer. If the BT master socket is not an

NTE5/CTE5, then the connection must be made by the network operator.

From a.c. mains input

(entering below terminal block)

Brown Wire

Blue Wire

Accord

C PCB

Mains Transformer

Primary Side

Mains Transformer

Secondary Side

200 mA

mains fuse

TB6

GND

Figure 2.8 Mains Connections to the Accord

Note: Connections shown as dashed lines are

factory made. Make no connections to

the earth terminal on the mains termi-

nal block.

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