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Screw terminal 3:
Reset input, active for negative edge
Contact input / Open Collector NPN
(switching at 0 V DC)
Low level:
0 ... 0,7 V DC
High level:
3 ... 30 V DC
Min. pulse duration:
50 ms
Input resistance:
approximately 2,2 MOhm
Screw terminal 5:
Operating mode switch (Mode)
Contact input / Open Collector NPN
(switching at 0 V DC)
Low level:
0 ... 0,7 V DC
High level:
3 ... 5 V DC
Input resistance:
approximately 2,2 MOhm
Function:
see Table 2
Input specification and pin assignment (AC-version)
Screw terminal
No. 1
Designation
INP A
AC/DC
Model
ISI30.013AX01
counting
ISI31.013AX01
subtracting
ISI32.013AX01
counting
direction
Table 3
Screw terminals 1 and 3:
Function: see Table 3
Optocoupler input 10 ... 260 V AC/V DC
galvanic isolation, active for High signal
Min. pulse duration:
16 ms
Max frequency:
approximately 30 Hz
Low level:
0 ... 2 V AC/V DC
High level:
10 ... 260 V AC/V DC
Input resistance:
approximately 160 kOhm
Screw terminal 2:
Common AC/DC, common connection for the opto-
coupler inputs (screw terminals 1 and 3).
Screw terminal 4:
Electrical locking of the reset key
Contact input / Open Collector NPN
(switching at 0 V DC)
Low level:
0 ... 0,7 V DC
High level:
3 ... 5 V DC
Input resistance:
approximately 2,2 MOhm
Input not active:
Reset key locked
Input in contact with GND:
Reset key unlocked
8
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No. 2
No. 3
Common
INP B
AC/DC
AC/DC
reset
adding
counting
Screw terminal 4:
Electrical locking of the reset key
Contact input / Open Collector NPN
(switching at 0 V DC)
Low level:
0 ... 0,7 V DC
High level:
3 ... 5 V DC
Input resistance:
approximately. 2,2 MOhm
Input not active:
Reset key locked
Input in contact
with GND:
Reset key unlocked
Screw terminal 6:
GND connection common for all inputs
Screw terminal 7:
(–) external power supply for the LCD backlight option
Screw terminal 8:
(+) external power supply for the LCD backlight
option(24 V DC ±20%, 50 mA)
No. 4
No 5
Reset Enable
Reset
NPN reset key
not connected
locking input,
Contact with
NPN reset
GND. key free.
input
Screw terminal 5:
Function: see table 3, active for negative edge
Contact input / Open Collector NPN
(switching at 0 V DC)
Low level:
0 ... 0,7 V DC
High level:
3 ... 5 V DC
Min. pulse duration: 50 ms
Input resistance:
approximately 2,2 MOhm
Input High:
- - -
Input Low :
Reset of the counter
Dynamic resetting behaviour
Screw terminal 6:
Common GND connection for screw terminal 4
(reset key locking input) and screw terminal 5 (reset
input).
Screw terminal 7:
(–) external power supply for the backlight option
Screw terminal 8:
(+) external power supply for the backlight option
(24 V ±20%, 50 mA)
No. 6 No. 7 No. 8
GND
BL
BL
–
+
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