ates when the intercom is in ring mode. A single N.O. contact is provided, rated at 250
volts a.c. / 3 amps. This module is fully encapsulated and an internal fuse protects the
contacts. In the event of a fuse failure, the module must be disconnected and replaced.
This station must be powered from an Echo Central Control. The data/power
is supplied from the Central Control line cards. Please refer to the instructions pro-
vided with the Central Control for full operational details of the Echo system.
C. Surface Mounting and Wiring.
The EZ1 ECHO intercoms are designed for mounting on a flat horizontal or
vertical surface.
1. Loosen the four M6 fixing screws to access the mounting holes. The
cover opens right to left.
2. Mount the unit through the four corner M6 fixing holes located on the
lower moulding. Mounting hardware is to be user supplied.
3. Remove the four M3 fixing screws and remove the encapsulation cham-
ber cover to gain access to the field wiring terminal block.
4. The lower moulding is supplied with three M20 cable entries suitable for
glands approved Exd or Exe for connection of the following cables:
•
Data/Power (from Central Control)
•
External Loudspeaker
•
Relay Switched Output - N.O. contact
5. A twelve-pole screw terminal socket block is provided for field wiring.
These terminals are rated for the following wire ranges: 22-12AWG (.5 - 4 mm
2
).
6. Terminate wires as follows:
Terminals 1 & 2 - Connect wire pair for switched N.O. relay contact
(250VAC,3A max.)
Terminals 3 & 4 - Used for internal wiring of relay coil
Terminals 5 & 6 - Link for Handset Operation/ Remove link for hands
free operation
Terminals 7 & 8 - Link for sensitivity/ Link increases gain on micro-
phone
Terminals 9 &10 - Connect wire pair from external loudspeaker
Terminal 11 - Power/Data line 24V- from central control
Terminal 12 - Power/Data line 24V+ from central control
Earth Stud - M6 stud for termination of earth wires
7. Refit encapsulation chamber cover with M3 screws.
8. Refit cover ensuring that cables are correctly routed to avoid damage to
conductors. Secure M6 screws to ensure weather-tightness.
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