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WCS-PG410
Commissioning
4.2
Connecting the WCS Read Head
If you connect several WCS read heads to one interface module, the WCS read heads must
have different addresses. This will allow the programmable logic controller to allocate the data
to the correct WCS read heads. If you connect only one WCS read head to an interface mod-
ule, this WCS read head always receives the address 0. You can connect up to four WCS read
heads to an interface module via an RS-485 cable. Each WCS read head is supplied with the
default address of 0. Details of how to change the address of the WCS read head can be found
in the configuration instructions for the WCS read head.
The number of connected read heads and their operating mode is configured in the hardware
project planning. For hardware project planning, use the GSD file, which can be downloaded
from our website: http://www.pepperl-fuchs.com.
Connection pin on read head
WCS2A
2
4
1
3
Table 4.1
Rotary Coding Switch S4
Rotary switch S4 has no function. Make sure that the rotary switch is in switch position 0.
Rotary Coding Switch S5
The Extended protocol (traverse distance 629.146 meters) is set on the interface module using
rotary switch S5. The WCS read heads are addressed via a modified prompt bit. A total of one
byte more is transferred in the response telegram of the WCS Extended protocol. For more
information on the data format, refer to the WCS electrical manual (DOCT-5959).
Rotary switch S5 = switch position 0 for WCS standard (read head WCSxB-LS221*)
Rotary switch S5 = switch position 1 for WCS Extended 629.146 meters (read head WCS3B-
LS221E*)
Other states/switch positions are not permitted.
Up to four RS-485 (Extended) read heads can still be connected to an interface module.
Connecting the WCS Read Head
1.
Connect the voltage supply for the WCS read head to terminals 1 and 2 of the 4-pin plug X2 on
the interface module.
2.
Connect the RS-485 data cable to the WCS read head on terminals 4 and 5 of plug X1.
WCS2B
WCS3A
2
1
4
2
1
3
3
5
Connections for the WCS read head(s)
Terminal on interface module
WCS3B
1
X2-1
2
X1-4
4
X1-5
3
X2-2
15
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