IP 240
Module Description and Accessories
Encoder supply
The power supply for 5 V encoders is taken from the programmable controller's power supply and
made available over subminiature D socket connectors X2 and X4 (pins 4 and 10) ( Section 4.2.2).
If 24 V is needed, the IP 240 must be powered via the external connection on connector X6
provided for this purpose (24 V, 0 V). The 24 V input is connected internally with encoder supply
outputs on subminiature D socket connectors X2 and X4 (pin 2) ( Section 4.2.2). The external
supply voltage is not filtered on the module.
Encoder supply
•
5 V DC
4.75 V to 5.25 V max. 0.8 A total
Short-circuit protection
Fuse 1.6 A T
•
24 V DC
20 V to 30 V max. 0.6 A total
Short-circuit protection
Fuse 1.0 A T
Influence of cable length on the encoder supply voltage
If the encoder voltage is provided by the IP 240, the voltage level and the total voltage line cross-
section must be such that the voltage on the encoder lies within the stipulated tolerance.
If the supply voltage is not sufficient to supply 5 V DC for the encoder, the encoder must be
provided with power from another source. The required voltage can, for instance, be fed in over
the 24 V (L+)/M terminal on connector X6. Note that, when supplying incremental encoders with
symmetrical outputs (to RS 422A) from another source, the difference in the earth potential
between the encoder and the module electronics may be no more than ±5 V.
2.3
LEDs
LEDs display the following information:
•
Hardware faults on the module (Module Fault=MF),
•
The states of the digital outputs (D1 and D2),
•
Wirebreaks
and short-circuits in the encoders with symmetrical pulse trains (Wire-Break=WB).
Fig. 2-4. LEDs
MF
D1
D2
1
WB
CH1
D1
D2
1
WB
CH2
Hardware faults on module (red)
Channel 1
Channel 2
Wire break indicator (red)
Digital output 2 set (green)
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a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a
Digital output 1 set (green)
EWA 4NEB 811 6120-02a
2-7