Planning the Installation
Page 23
Figure 3. FSL connections with masking
4-wire CC
This uses a separate pair of wires for the alarm and tamper contacts. No end-of-line
resistors are used. Selecting 4-wire CC may halve the maximum number of wired zones
the device supports, as shown in Table 5.
An ADP-10CC board can be fitted to the control unit to convert the ten FSL zones (if
available) to ten 4-wire CC zones. Without the board fitted, the control unit supports five
4-wire CC zones. If you are using an ADP-10CC board, select 2-wire FSL 2k2/4k7 as the
wiring type.
Table 5: 4-Wire CC Zones
Equipment
FSL or 2-wire CC
4-wire CC
Panel with 10 on-board zones
10 zones
5 zones
EXP-PSU and original EXP-W10
10 zones
5 zones
EXP-WCC and new EXP-W10
10 zones
10 zones
Keypad with 2 on-board zones
2 zones
1 zone
2-wire CC
This uses a single pair of wires for each detector. No end-of-line resistors are used.
Checking cable requirements
Standard cable type
Normally, the control unit requires standard 7/0.2 un-screened 4-core alarm cable for
wiring to bus devices and wired siren/strobe units.
For bus cabling, use one pair for data lines A and B. Use the other pair for 12V and 0V.
Screened cable
For maximum performance in environments where there is electromagnetic noise, use
twisted-pair screened cable with a characteristic impedance of 100-120 Ohms, such as
Belden 8132 or cable designed for RS485.
Fault/trouble
Fault
Alarm
Mask
Tamper
Normal
EOL
Alarm
Tamper
Tamper