Cooper key-kp01, Installation Manual

Page: 9 / 16

Page 9
KEY-KP01
Cable Type
In general, the control unit requires standard 7/0.2 un-screened alarm cable
for wiring to keypads.
Screened cable may prove necessary if the installation site has equipment that
produces high levels of R.F. (Radio Frequencies), for example welding equip-
ment. If screened cable is required, you should keep to the following guide-
lines:
1. Avoid earth loops by connecting the screen on the cable to mains earth at
the end station but not at the keypad.
2. The continuity of the cable screen is most important and screens MUST be
continuous along the full length of the cable.
3. If the cable enters any metal enclosure, ensure the screen is isolated from
the case.
Cable Segregation
Segregate the keypad cabling from any other wiring, such as mains supply ca-
bles, telephone cables, computer network cables and R.F. cables. Use cable ties
to keep cables separated.
Keep the keypad cable clear of any other cables supplying sounders or exten-
sion loudspeakers.
Cable Configuration and Length
You may connect the keypads either in daisy chain, or in star at the end sta-
tion connector. For a parallel connection the cable length should not exceed
100m. For serial connection the cable length from to the most distant keypad
should not exceed 100m for an i-on16, 250m for an i-on40, or 1,000m for an
i-on50EX/160EX or Menvier30/40/100/300.
Keypad Connection
See Figure 7 for wiring connections at the keypad and control unit.
Bus Termination at the Keypad
See the relevant control unit Installation Guide for advice on terminating the
RS485 bus within the keypad
Keypad Addressing
Each keypad connected to an end station must have a unique address. For
an i-on16 or i-on40 see Figure 6. For an i-on30EX/50EX/160EX or Men-
vier30/40/100/300 keypad addressing is carried out from the Installer Menu
- see the relevant Engineering Guide .
Backlight Brightness
When connecting the keypad to an i-on16 or i-on40 you can control the bright-
ness of the keypad backlights by fitting links over the BRIGHT jumper on the
keypad pcb (see 4b on Figure 5).
Jumper OFF The keypad backlights glow at normal intensity.
Jumper ON The keypad backlights glow extra bright.
To program whether the backlights are on or off see page 11.
Note: an i-onEX or Menvier30/40/100/300 control unit can change the back-
light brightness from the Installer Menu. Do not fit the BRIGHT jumper.