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7-1
< 7. Contact I/O Expansion>
7.
Contact I/O Expansion
7.1
Overview
To UT750 and UP750, you can connect up to 2 units of digital I/O expansion modules of
Yokogawa µFA20 via µ-Bus. Connecting I/O expansion modules, UT750 and UP750 allows
for a maximum of 32 points of additional contact inputs/outputs. (8 points of contact inputs
and 8 points of contact outputs per module)
7.2
Setting Up Contact I/O Expansion
After wiring has been completed, set the station number (ST No.) on the µFA20 expansion
module.
● Setting the station number (ST No.) on the µ FA20 expansion module
For details, see the hardware manual of µFA20 small programmable logic controller (IM
34M5F01-01E).
Set the station number with the rotary switch on the module. When connecting one module,
set to “1.” When connecting two modules, set the first module to “1” and the second module
to “2.”
Table 7.1 Station Number and I/O relays
ST No.
Input relays available
Output relays available
1
0101 to 0108
0151 to 0158
2
0201 to 0208
0251 to 0258
NOTE
The correspondence between the relay numbers of the I/O relays and the added 8 points is
shown in Table 7.1.
Set the output reset/hold switch of the expansion module to OFF (the setting at factory
shipment).
IM 05G01B02-01E
6th Edition : 2006.05.31-00