Installation, connecting up, commissioning
3.3 Wiring
TIM 1531 IRC
46 Operating Instructions, 02/2018, C79000-G8976-C468-02
Suitable fusing for the power supply cable
The current at the connecting terminals must not exceed 4 A. Use a fuse for the power
supply that protects against currents > 4 A.
The fuse has to be designed for protection of DC power supply circuits as well as for the
following requirements.
• In areas used according to NEC or CEC:
– Suitable for DC (min. 60 V / max. 4 A)
– Cut-off voltage min. 10 kA
– UL/CSA listet (UL 248-1 / CSA 22.2 No. 248.1)
– Classes R, J, L, T or CC
• In other areas:
– Suitable for DC (min. 60 V / max. 4 A)
– Cut-off voltage min. 10 kA
– Approved for power supply circuits (branch circuits) according to local regulations
(e.g. IEC 60127-1, EN 60947-1)
– Breaking characteristics: B or C circuit breakers and fuses
You do not need a fuse for the power supply cable if you use a voltage source according
NEC Class 2 or a power supply from the range of accessories, see attachment Power
supply (Page 303).
Connection only with power off
Only connect the TIM with the power switched off.
The device can be disconnected from the power supply with the terminal block.
Requirement: The TIM is mounted.
1. Connect the external power supply to the terminal block of connector X80.
2. Connect the lines of the (different) Ethernet networks to the desired ports of the TIM.
Note the permitted combinations of the Ethernet connectors in the section Ethernet
interfaces (X1, X2, X3) (Page 33).
3. Plug the cable to the modem in the serial connector of the TIM.
When connecting a star shaped network, remember to connect the terminating resistor
for RS-485 operation of the interface. See also the section below.
Contacting the shield of the cable on the plug
The shield of the cable must be contacted. To do this, strip the insulation from the end of
the cable and connect the shield to functional earth.
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