6.7 Power Supply and Miscellaneous
6.7.1 Primary Power Supply 1.949.404 (earlier version: 1.949.403)
The D21m I/O frame may be equipped with either one or, for redundancy
purposes, with two primary power supply units.
The module used is a primary switching AC/DC converter with an input
voltage range of 90...264 V
AC
/50...60 Hz, automatic power factor correction
and a standard IEC mains inlet. Output is 24 V
DC
/max. 8.5 A. It contains no
adjustable elements; if the internal primary fuse should fail, the unit must be
returned to the factory for repair.
The primary power supply unit(s) is/are plugged directly into the PSII PCB
1.949.402, where all required voltages for the frame are generated.
FAN/STATUS Connector: This front-panel connector (15-pin D-type f for 1.949.404; 9-pin D-type f for
1.949.403) is used to output an electrically isolated status signal when the
primary power supply (or one of them) should fail. The contacts of a relay
located on the LED/PSII PCB are available on this connector, as well as a
+24 V
DC
supply and ground. The relay is energized as long as all supply volt-
ages are ok, pins 4 and 6 (or pins 1 and 2 on 1.949.403) are connected then.
In case of failure of any of the frame’s supply voltages, pins 6 and 8 (or pins
2 and 3 on 1.949.403) are connected. Please note that only the connector of
the right-hand primary PSU can be used for the status signal, even if two
primary power supply units are installed in the D21m I/O frame.
The 15-pin connector on the current version 1.949.404 allows the additional
supply of a fan unit (1.949.597) using a 1:1 m/f cable (89.20.1167, included
with the fan unit).
Pin Assignment: FAN/STATUS (15-pin D-type, female) on 1.949.404:
Pin Signal Pin Signal
1 +24 V
DC
(fan supply, 650 mA max.) 9 GND
2 reserved - do not connect! 10 n.c.
3 GND 11 n.c.
4 * Relay NO (normally open) 12 reserved - do not connect!
5 ** Fan supply OK (active low) 13 ** Fan in (active low)
6 * Relay COMMON 14 reserved - do not connect!
7 GND 15 n.c.
8 Relay NC (normally closed)
* Connected if everything is ok ** Status signals, foreseen for fan supervision
1
8
15
9
Solder/Crimp View
(or Socket View)
D21m System
6-56 D21m Modules Date printed: 30.08.07
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