urmet domus 788/21 - Video Door Phone Power Unit Replacements (789 Series)

BASIC SYSTEM DIAGRAMS
INSTRUCTIONS FOR URMET DOMUS DEVICE INTERCHANGEABILITY
6
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sec.1f
DOOR PHONE - VIDEO DOOR PHONE SYSTEMS: Installation Diagrams
REPLACING VIDEO DOOR PHONE POWER UNIT Ref. 789 WITH Ref. 789/1A
REPLACING VIDEO DOOR PHONE POWER UNIT Ref. 789
AND Ref. 789/1A WITH Ref. 789/5B
REPLACING VIDEO DOOR PHONE POWER UNIT Ref. 789 WITH Ref. 789/1A
The 789/1A power unit can replace the obsolete 789 model.
The terminals correspond as follows:
REPLACING VIDEO DOOR PHONE POWER UNIT Ref. 789 AND Ref. 789/1A WITH Ref. 789/5B
The 789/5B video power unit has the following characteristics:
1) It must be powered at 230 V exclusively.
2) It can only be used in video door phone systems with electronic call system (it only has a PS output, no SN output).
3) It can power only two video door phones in stand-by mode (V2).
4) It can power up to 10 video distributors.
5) It is not provided with a -J output for intercom service.
It can therefore replace the Ref. 789 and Ref. 789/1A power units only in systems with the characteristics and limitations above.
In these cases, the terminals correspond as follows:
SV102-1814B
Ref. 789 Ref. 789/1A
-
230
~0
~12
~A
~B
+6
-6
PS
SN
1/~
R1
R2
+TC
0
110
230
~0
~12
~A
~B
PS
-6
+6
SN
R1
1/~
R2
+TC
0
OUTPUTS
POWER
AP
SE1
SE2
+6J
-J
AP
SE1
+6J
SE2
-J
MAINS ~
MAINS ~
VOLTAGE
UNIT
ELECTRONIC
UNIT
POWER SUPPLY
Ref.789/5B
(230V)
POWER SUPPLY
Ref.789(230V)
Ref.789/1
(110/230V)