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The shield is connected to one end of the reed switch and the live to the other end.
A pulse generator with an open collector output (NPN transistor) can be connected to this
input mode. In this case the emitter (or common) must be connected to terminal 14 and the
collector to terminal 16.
2.3 Analog Output Connection
The analog output connected to terminals 9 and 10. Terminal 9 is the positive of the output and
terminal 10 is the negative (common).
When the instrument is used for a current output then the load applied to the output should be
less than 600 ohms.
When the instrument is used for a voltage output then the load applied to the output should be
greater than 10,000 ohms.
2.4 Pulse output connection
Terminal 12 is the emitter of an opto-
isolated NPN transistor and terminal 11 is
the collector.
This output can be used to activate
electromagnetic
units
counters or relays.
No protections for excess current or
voltage spikes are provided. These
should be installed externally as required.
3. SETTING UP
Once the instrument is installed the
only thing that has to be done is
setting the frequency which must de
applied to the input frequency to
obtain the full scale analog output.
To introduce this frequency we have
four BCD coded switches and a
jumper with four positions. With the
four BCD coded switches we select
the four significant digits and with the
jumper we select the position of the
decimal point. To get to the switches,
a screwdriver can be used to lever out
the top cover, which is just clipped in
its place.
The jumper must be in one of the
four
positions
provided.
instrument will not work correctly if
the jumper is not in one of the four
positions.
4
CI-420
such
as
DC
Connection to a PLC with a "PNP" input
Example of connection to a PLC
1 2 3 4
0
0
0
1
2
3
4
0
0
0
1
2
3
4
0
0
0
1
2
3
4
The
0
0
0
11
+ 24 V
PLC
12
Input
0 V
Frequency = 13,29 Hz
0
Frequency = 521,3 Hz
0
Frequency =1,234 Hz
0
Frequency = 1234 Hz
0
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