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STF-R/C/D/IP Hardware Manual
920-0141 Rev. A
6/5/2018
3.1.2 X5, X6, X7, X8 digital input signal
X5,X6,X7,X8: optically isolated, single-ended, 5-24VDC, minimum pulse width 100μs, maximum pulse frequency 5KHz
* X5 can be used as enable input or general purpose input.
* X6 can be used as alarm reset input or general purpose input.
* X7 can be used as general purpose input.
* X8 can be used as general purpose input.
Because the input is an optically isolated circuit, a 5-24V power supply is needed. For example, you can use the power
supply of the PLC when you are using a PLC control system, but if you want to connect a relay or mechanical switch to the
input , you must need a power supply.
XCOM is an electronics term for a single-ended signal connection to a common voltage. In the case of STF series, if you
are using a sourcing (PNP) input signals, you need to connect XCOM to the ground (power supply -), if you are using a
sinking(NPN) input signals ,the XCOM need to connect to the power .
Please use
STF Configurator
software for X5,X6,X7 and X8 function configuration. Following graphs shows some
common connection methods for the inputs:
5-24VDC
Power
Supply
Connecting the inputs to a Switch or Relay
XCOM
X5/X6/X7/X8
+
-
STF
Drive
Switch or Relay
(closed = logic Low)
5-24VDC
Power
Supply
XCOM
+
-
+
-
X5/X6/X7/X8
Connecting the inputs to a NPN type output
STF
Drive
NPN
Output
output
+
-
+
-
X5/X6/X7/X8
XCOM
Connecting the inputs to a PNP type output
5-24VDC
Power
Supply
STF
Drive
PNP
Output
output