Siemens SINAUT ST7 System Manual page 166

Installing and putting a TIM into operation
4.5 Installing a TIM
The power for the device (24 V DC) must be generated as a safe extra low voltage. This
means it must be a SELV (Safety Extra Low Voltage) or PELV (Protective Extra Low
Voltage) according to DIN VDE 0100 Part 410 (IEC 60364-4-41).
Cables
To wire the power supply, use flexible cables with a cable cross-section of 0.25 ...0.75 mm
If you wire only one cable per connection, no wire-end ferrule is necessary.
Wiring
To wire up the power supply module with a TIM, follow the steps below:
1. Open the front panels of the power supply unit and the TIM.
2. Connect the power supply cables from the power supply unit to the TIM: M and L+
3. Close the front panels.
Note
To avoid ground loops, do not connect the shielding of the TIM.
Wiring diagram
The figure below shows the wiring diagram for one or more TIMs of the type TIM 4. Instead
of a TIM, a SINAUT ST7 modem of the type MD2, MD3 or MD4 can also be installed. The
same wiring diagram applies to these modules.
Figure 4-27
The next figure shows how to connect up the TIM 3V-IE variants and the TIM 4R-IE.
166
WARNING
L+
M
Power supply connection for TIM 4
M
M
L+ L+
DC
M 24V M
System Manual, 07/2009, C79000-G8976-C178-07
M
L+
DC DC
24V M 24V
Station control system
.
2