ic audio
EV-5000
EN
27
21. EV-REL Relay Card
Relay card for extending zones and for getting additional switch functions
Pin Layout of Relay Contacts:
C = Common
NC = Normally closed
NO = Normally open
All 4 relays have identical pin layout and each
provide for 2 changeover contacts.
The relay card EV-REL is an open board to be built in a housing or in a rack. A flange mounted
bracket allows for fast and easy fixing on mounting rails (DIN rail 35x7,5 or 35x15mm).
EV-REL provides 4 relays (R1...R4) with 2 dry changeover contacts each.
It can be controlled by the 80-channel MIC bus of a EV-5000 Master and/or 5 control contacts. For
easily inserting into a call station bus, 2 parallel RJ45 sockets are available.
Each relay can be programmed by means of DIP-switches. By switching speaker lines in inverse
mode, the supervising functions from Master/Slave units will be maintained.
Power has to be supplied by an external 24V DC source, for instance by a mains adaptor or by the
continuous output of a battery manager.
Please find below a block diagram EV-REL:
Relay contacts 4x2 changeover
Global decoder
80-channel bus
Supply voltage
0V +24V
Switch matrix 80-channel bus
Data decoder 80-channel bus
80-channel
MIC bus
Switch matrix
contact
Contact
inputs
R1
R2
R3 R4
NO
C CNC NC
NO
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