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Installation and commissioning of the modems and routers
5.9 Installing and putting a SINAUT MD2, MD3, MD4 modem into operation
Supply of the device
The power for the device (24 VDC) 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 mm2.
If you wire only one cable per connection, no wire-end ferrule is necessary.
Wiring
To wire up the power supply module with a SINAUT modem, follow the steps below:
1. Open the front panels of the power supply unit and the modem.
2. Connect the power supply cables from the power supply unit to the modem: M and L+
3. Close the front panels.
Note
To avoid ground loops, do not connect the shielding of the modem.
Wiring diagram
The figure below shows the wiring diagram for one or more modems and a TIM. The same
wiring diagram applies to all modules.
Figure 5-56
Note
The two TIM 3V-IE variants and the TIM 4R-IE do not have a 4 terminal but a 2 terminal
terminal strip for connection to the power supply 24 VDC (L+ and M).
234
WARNING
Connecting to the power supply 24 VDC
SINAUT ST7 station control system
System Manual, 09/2016, C79000-G8976-C178-10
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