User Manual

GAMMA instabus
Technical Product-Information
July 2020
Power Supply Unit N 125/02 5WG1125-1AB02
Power Supply Unit N 125/12 5WG1125-1AB12
Power Supply Unit N 125/22 5WG1125-1AB22
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Siemens Schweiz AG
Smart Infrastructure
Global Headquarters
Theilerstrasse 1a
CH 6300 Zug
RS-AA
© Siemens AG 2020
Subject to change
Update: http://www.siemens.com/gamma-td
Installation Instructions
• The device may be used for permanent interior installa-
tions in dry locations within distribution boards or
small casings with DIN rail EN 60715-TH35.

WARNUNG
• The device may be built into distribution boards
(230/400 V) together only with appropriate VDE-de-
vices.
• The device must be mounted and commissioned by an
authorised electrician.
• A safety disconnection of the device must be possible.
• The prevailing safety rules must be heeded.
• The device must not be opened.
• For planning and construction of electric installations,
the relevant guidelines, regulations and standards of
the respective country are to be considered.
Technical Data
Input voltage
• rated voltage: AC 120-230 V, 50...60 Hz
DC 220 V
• permissible range: AC 102...253V, DC 176...270 V
Rated power intake
approx. 24 VA
Output voltage
• rated voltage: DC 24 V
• safety extra low voltage (SELV)
• permissible range: DC 21...30 V
Output current
• rated current 160 mA (N 125/02),
320 mA (N 125/12),
640 mA (N 125/22)
• short-circuit current:
limited to
1.0 A (N 125/02, N 125/12),
1.5 A (N 125/22)
Backup interval
on input voltage failure: approx. 200 ms at rated current
Operator elements
slide switch: for resetting the bus devices connected to
the line (operation > 20 s)
Display elements
• 1 red LED: for indicating a voltage interruption on
operating the slide switch in RESET-position
• 1 green LED: for indicating normal operation
• 1 red LED: for indicating a shorted-out bus line or
device over-load
Connections
• mains connection, screwless plug-in terminals:
strip insulation for 10...11 mm
permissible conductor types/cross sections:
- 0.5...3.3 mm² ( AWG 12) single core
- 0.5...1.5 mm² plain flexible conductor
- 0.5...3.3 mm² (AWG 12) stranded conductor
- 0.5...3.3 mm² (AWG 12) flexible conductor with ter-
minal pin, crimped on gas tight