6
Alternatively, if the auxiliary device is powered from the same
circuit as the Alarms and Relay Base ie 230VAC, a link wire can
be inserted between the L (Live) terminal and the C (Common)
terminal of the Relay Base. Then, connect either the NC or NO
contact of the relay (depending on what is required) to the auxiliary
device. Connect the N (Neutral) terminal from the Relay Base to
the auxiliary device (see fig.7).
3. If momentary (pulse) relay operation is required, carefully
and gently slide the yellow switch to the left (P) position.
This is commonly used with warden call systems where only
momentary short circuit signalling is required. This must be
done before the mains power is connected or the rechargeable
cells (Ei128RBU only) are activated.
With the switch in the C position, the alarm signal will switch the
relay until it receives a cancel signal.
4. For the Ei128RBU only, connect the rechargeable cells by
carefully and gently sliding the yellow switch to the ON position.
This switch must be in the ON position to ensure correct operation.
5 If installed underneath the Alarm, screw the Alarm mounting
plate on top of the Relay Base. Line up the Alarm on the
mounting plate and slide on.
6 If installed away from the Alarm, fit and screw the cover to the
pillars using the two screws supplied.
7. Re-connect the mains power.
8. The green LED on the Alarm(s) should be on. When the test
button is pressed, the horn should sound, and the relay will
switch within 10 seconds.
Note: A maximum of 12 Alarms may be interconnected to one
Relay Base. When one Alarm sounds, all interconnected Alarms
will sound and the relay will switch.
Attention: Do not interconnect Carbon Monoxide Alarms with
Smoke/Heat Alarms unless an Ei1529RC control switch is used
in that system. The Ei1529RC control switch will allow the user
to identify quickly the source of the alarm (e.g. fire or CO gas)
and take appropriate action. This is important as the occupant will
need to open all windows and doors if it is a CO incident but do
the opposite to slow down a fire.
Note: The rechargeable cells of the Ei128RBU enable it to switch
during mains failure upon receipt of an alarm signal from a mains
powered Alarm with battery back up. The rechargeable cells can
power the relay for up to 2 months in the event of the mains being off.
The Ei128R does not have any battery back up and as such will
not switch during mains failure.
Note: Auxiliary devices connected to the relay contacts do not give
a warning until the contacts have switched for at least 200mSec.
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 7
