Urmet 1083 Notice page 35

3 POWER-ON AND POWER VOLTAGE TEST
Power the system and run the following tests with the system in standby conditions after carefully setting
the line terminations and confi guring all devices before fi tting the monitors on the brackets:
Power supply unit Ref. 1083/20A
Check that direct voltage from 44Vdc to 48Vdc is present at each LINE1 and LINE2 terminal pair.
Calling stations
Check for direct voltage in the range from 38Vdc and 48Vdc at the LINE terminals.
Video distributors Ref. 1083/55
Check for direct voltage in the range from 38Vdc and 48Vdc at the LINE (IN/OUT) and LINE1-4 terminals.
Apartment stations
Check for direct voltage in the range from 38Vdc and 48Vdc at the LINE terminals.
Column interfaces
Check for direct voltage in the range from 38Vdc and 48Vdc at the POWER, LINE IN and LINE OUT
terminals.
Door unit interfaces
Check for direct voltage in the range from 38Vdc and 48Vdc at the POWER IN and POWER LINE
terminals.
4 CHECK THE SYSTEM
HOW TO SPLIT THE SYSTEM INTO SECTIONS
It may be useful to split the system into sections to isolate suspected problems when troubleshooting or
seeking incorrectly wired areas.
As previously mentioned, the interconnection of devices forms an adapted transmission network. It is not
therefore possible to disconnect parts of the system without considering the disruption that this will cause.
Observe the following rules:
1. Turn the interface termination to the ON position if a branch of a line connected to the column interface
is disconnected.
column
interface
2Voice
power supply
TC
§
Disconnect the starting side and not the arrival side.
2. Fit a termination (Z in the ON position) on the last device connected to the riser column if a section
connected in in-out mode is disconnected.
DS1083-029E
All manuals and user guides at all-guides.com
column
interface
Z= OFF Z= ON
Termination OFF
2
Termination OFF
1
column
interface
2Voice
power supply
TC
2
Termination
1
column
interface
Z= ON
ON
Z= ON
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