5
5.2 Installation away from the Alarm
WARNING: When the relay is not installed underneath an Alarm,
the cover supplied must be fitted to ensure the user is not exposed
to fire or shock hazards.
1. Install the Alarm(s) as described in their manuals.
2. Install the Relay Base near the auxiliary device or in some
other location convenient for wiring. Where the incoming wiring is
surface mounted, the appropriately sized ducting/conduit must be
chosen to mate with the unit. Use a sharp knife to remove material
from the selected knockout, making sure that there is no gap when
mated with ducting / conduit. There are three knockouts – two
on the sidewall and one on the rear. DO NOT USE the knockout
closest to the P/C switch.
3. Remove the required knockout, bringing the wiring from one
of the Alarms through it and connecting the three wires (L=Live,
N=Neutral and IC=Interconnect) to the Relay Base mains terminal
block. (Screw tightening torque: max 0.5Nm (5.1kgf.cm)).
4. Screw the Relay Base in place.
5.3 Wiring the relay
1. Connect the L (Live) wire from the power supply of the auxiliary
device to the C (Common) terminal.
2. Then connect either the NC or NO contact of the relay
(depending on what is required for controlling the auxiliary
device) to the auxiliary device. For example, if the relay is used
to cut out a boiler in case of alarm, then NC should be used but
for a Beacon that should only be on in case of alarm, then the
NO should be used.
Ei128R / Ei128RBU
The above shows the connection for Carbon Monoxide Alarms.
Connect the Smoke/Heat Alarm similarly but on a separate circuit to the
Carbon Monoxide Alarm (unless an Ei1529RC Control Switch is used on the system)
Ei3018
Ei3018
Figure 5
L
IC
N
Earth wire if
present
C
NC
NO
L
IC
N
Auxiliary
Device
Mains Alarm
Ei128R / Ei128RBU
Auxiliary Device
Power Supply
Alarm and Relay
Power Supply
(230V AC)
+
-
L
IC
N
Earth wire if
present
C
NC
NO
L
IC
N
C
NC
NO
External Device
(230V AC)
Mains Alarm
+
-
C
NC
NO
Alarm and Relay
Power Supply
(230V AC)
Ei128R / Ei128RBU
Figure 6
