Siemens SIMATIC Distributed I/O System DP/ASi Link Specifikace stáhnout pdf (Strana 101)

Wiring

5-15

Distributed I/O Device ET 200M

EWA-4NEB780600602-06

5.2.2 Wiring the Power Supply and IM 153-x

Power Cables

To wire the power supply, use flexible cables (see Table 5-2 on page5-13).

If you use only one cable per connection, you don’t need an end ferrule.

Jumper

Use the jumper when wiring the PS 307 power supply module to the IM 153-x. The

jumper comes with the power supply module.

Other 24 V Connections

Above the jumper on the power supply PS 307 there are still a number of free 24 V

connections for the supply to the S7-300 I/O modules.

Wiring the 24 V Connections with a Redundant Configuration with 2 IM 153-2

Note

If you reverse the polarity of L+ power supply when wiring the IM 153-2 in a

redundant configuration, short-circuiting will occur via the frame connection. The

reason for this: Both IM 153-2 have a common ground cable via the bus module

BM IM/IM.

With IM 153-2AA02/-2AB01:

In a redundant configuration we recommend that you fuse the L+ supply before

the IM 153-2 with 2.5 A.

With IM 153-2Bx00:

 In configurations with ungrounded reference potential (jumper between M and

functional ground removed, see Figure 5-3), an internal electronic fuse which

regenerates after approx. 30 seconds is triggered in the event of polarity

reversal.

 In configurations with grounded reference potential (jumper inserted between M

and functional ground), the short-circuit current flows through these jumpers

and the functional grounds in the event of polarity reversal.

The IM 153-2 is not damaged if fuse protection configured for the cross-section

of the connecting cable is provided upstream of the module.

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Siemens SIMATIC Distributed I/O System DP/ASi Link Specifikace Strana 101