Eaton i-on40 - Step 3. Connect Control Unit to Mains

Installation i-on40
Page 10
Fitting Keypads
Select which cable entry you are going to use and
break out the appropriate plastic sections.
Use 4mm x 25mm countersunk screws with a
thread suitable for the wall material in at least
three fixing holes when mounting the back of the
keypad on the wall.
i-KP01
For i-KP01 keypads on Grade 3 systems drill out
the hole for the back tamper using a 7mm bit (see
Figure 17).
Figure
17
Screw i-KP01 Back Box to Wall
KEY-K01/KP01/KPZ01
Make sure the backplate is level and mark, drill
and plug at least three fixing holes. Screw the
backplate to the wall through the fixing holes
using the M4 screws.
Figure
18
Screw KEY-K01/KP01/KPZ01 Back Box
to Wall
Connecting Keypads to Control Unit
Cable Type
In general, the control unit requires standard 7/0.2
un-screened four core alarm cable for wiring to
keypads.
For maximum performance in harsh environments
use twisted pair cable with a characteristic
impedance of 100-120ohms eg: CAT5 or cable
designed for RS485.
Use one pair for data bus A & B. Use the other
pair for 12V & 0V. For optimum performance the
voltage at the keypad should be greater than 12V.
Screened cable may prove necessary if the
installation site has equipment that produces high
levels of R.F. (Radio Frequencies), for example
welding equipment. If screened cable is required,
you should keep to the following guidelines:
1. Avoid earth loops by connecting the screen on
the cable to mains earth at the control unit 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 cables, telephone
cables, computer network cables and R.F. cables.
Use cable ties to keep cables separated.
Keep the keypad cable clear of cables supplying
sounders or extension loudspeakers.
Cable Configuration and Length
You can connect up to four wired keypads to the
control unit. You may connect the keypads either
in daisy chain (serially), or in star (parallel)
configuration at the control unit connector.
Figure
19
Keypad Wiring Configurations
For star configurations the cable length from
control unit to the most distant keypad should not
exceed 100m. For a daisy chain configuration the
total cable length should not exceed 250m.
Connection
Figure 20 shows the wiring connections at the
keypad and control unit.
250m
terminate
terminate
Star Daisy Chain
100m