GS120-MAN-14V05 (0307)
Copyright © 2014 Gedge Systems
7
4.2 - Wiring the user inputs for use as counters
GS120 user inputs can be confi gured to run in counter mode. To enable the counter
mode options,
User input 1
must fi rst be set to
Counter
(see 6.4B).
User input 1
is
always used as the count pulse input. Counter inputs are wired as shown below:
User input 1
User input 2
User input 3
Common
Sensor 1
Sensor 2
Sensor 3
Multiple sensors may be connected, and any combination of NPN, TTL and switch
contacts may be used for sensors 1, 2 or 3.
NPN
Open
collector
output
User input 1, 2 or 3
Common
Switch
contacts
Pushbutton/
Relay
User input 1, 2 or 3
Common
TTL
5V
0V
User input 1, 2 or 3
Common
In counter mode, additional options become available:
›
Slow debounced counter mode
and
Restore count at power on
may be acti-
vated or deactivated (see 6.4C-D).
›
Additional input functions will become available on
user inputs 2 & 3
:
Count
direction
,
Gated count
, and
Reset count
(see 6.4E-F and Appendix C).
Note that when using counter mode, it is advisable to set both the
Com 1
and
Com 2
inputs to
Disabled
(see 6.2D). If
Com 1
and/or
Com 2
are still active, then the count
value will be summed with the values obtained via the serial ports.