General notes
Maintenance
The OZW775 central communication unit requires no maintenance (no battery
changes, no fuses). Clean the housing only with a dry cloth.
The central communication unit OZW775 cannot be repaired in the field. If faulty, return
to the Repair Center of the relevant Siemens Regional Company.
Repair
The central communication unit is subject to directive 2002/96/EEC (WEEE, Waste of
Electrical and Electronic Equipment).
Disposal
"Dispose of the device as electronic waste in compliance with European directive
2002/96/EEC (WEEE) and not as municipal waste. Observe all relevant national
regulations and dispose of the unit correctly. Comply with all local and currently valid
legislation
".
Technical data
Operating voltage
Rated voltage as per EN 60950-1
Safety extra low-voltage (SELV) / protective extra low-voltage
(PELV) as per
Requirements for external safety isolating transformer
(100 % duty, max. 320 VA)
AC 24 V
±
20 %
AC 24 V
HD 384
EN 61558-2-6
Frequency 50 / 60
Hz
Power consumption OZW775
20 VA
Supply line fusing
Max. 10 A, transformer on primary
side
Power supply G, G0
Clock reserve
46 h typical, min. 12 h
OZW775 device list
Up to 250 Synco devices
Functional data
Number
8 (terminals D1...D8 and 1 ground
connection for 2 terminals each)
Contact sensing
Voltage
Current
DC 16.5 V
Typically 8 mA
Requirements for status / fault contacts
Signal coupling
Type of contact
Insulating strength against mains potential
Potential-free
Maintained contact
AC 3750 V as per EN 60950-1
Permissible resistance
Contact closed
Contact open
Max. 200
Ω
Min. 50 k
Ω
Digital inputs D1...D8
Number
8 (terminals X1...X8 and 1 ground
connection for 2 terminals each)
Sensors
Passive
Active
LG-Ni1000, T1, Pt1000
DC 0...10 V
Transmitter
Active
DC 0...10 V
Contact sensing status / impulse contacts
Voltage
Current
DC 16.5 V
Typically 1 mA, max. 6 mA
Requirements for status contacts
Signal coupling
Type of contact
Insulating strength against mains potential
Potential-free
Maintained contact
AC 3750 V as per EN 60950-1
Universal inputs X1...X8
13/18
Building Technologies
Central communication unit OZW775 V2.0
CE1N5663en
HVAC Products
29.10.2008
