Connecting Power To The System; Mains Power; Stand-By Battery; Connecting The Accord Xpc To The Pstn - ADT ACCORD XPC Installation Manual

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 2.6.
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.
From a.c. mains input
(entering below terminal block)
Brown Wire
Blue Wire

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, e.g. 200 mA × 12 hours = 2.4 Ahr. Install the next battery
size up, in this case 2.8 Ahr.
Connecting the Accord
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) the connection can be
carried out by the ADT engineer. The master socket should be sealed to
prevent use by the customer.
12
Accord C PCB
XP
AC
TB6
200 mA
Mains Transformer
mains fuse
Secondary Side
Mains Transformer
Primary Side
Figure 2.8 Mains Connections to the Accord
C to the PSTN
XP
Note: Connections shown as dashed lines are
factory made. Make no connections to
the earth terminal on the mains terminal
block.