Siemens SINAUT ST7 - Connecting to the Power Supply

Mounting and Installation
6NH7811-0AA22 © Siemens AG 2002 All Rights Reserved
2-40 MD2 Modem (07/2002)
2.4.4 Connecting to the Power Supply
!
Warning
Connecting the modem module to live current can cause damage to it. Only
connect the modem to the power supply when it is not under current.
!
Warning
The power for the device (DC 24 V) must be generated as safe, electrically
isolated low voltage. This means that the power must be SELV (Safety Extra Low
Voltage) or PELV (Protective Extra Low Voltage) in conformity with DIN VDE
0100 Part 410 (IEC 60364-4-41).
Cabling
For wiring the power supply use flexible cables with a diameter of 0.25 ... 0.75
mm
2
. A core sleeve is not necessary if you are wiring only one cable per
connection.
Wiring
To wire the power supply module to a SINAUT modem, carry out the following
steps:
1. Open the front door of the power supply and the modem.
2. Connect the power supply cables to the modem: M and L+
3. Close the front doors.
!
Important
To avoid ground loops you should not connect the shielding of the modem.