(3) When leading out the wiring from two ports, remove the plug also.
(4) Remove the terminal cover.
(5) Connect an electrical wiring conduit.
(6) Pass the wiring through the electrical wiring conduit and then connect the
wiring to the terminal block.
(7) Put the terminal cover back in place.
●
Wiring example
8
9
10
5
6
1
2
7
11
DB
DA
I+
SG
FG
COM
COM
+24V
P+
Load
Pulse output
24 Vdc power supply
Internal
circuit
External wiring
RS-485 communications
(A terminating resistor is
not attached)
4 to 20 mA
Pulse output wiring example
(1) No-voltage input type
5
6
Counter
5
6
Counter
Pull-up resistor
DC power
supply
(30 V max.)
(2) Voltage input type
Input
0 V
Input
0 V
5
6
(3) Connection to a relay
DC power
supply
(30 V max.)
Input
Load
Load
Power for load
+
−
Handling precautions
•
Connect COM of 4-20 mA output directly from the terminal block.
•
Do not use the COM of power supply terminal (4-20 mA) and the COM of pulse
output terminal as a common power supply terminal for external devices.
•
Be sure that the pulse output never exceeds the output rating of this device.
When driving a relay, use a relay with a built-in diode for coil surge absorption.
Failure to do so may cause faulty operation.
•
This device becomes a warm-up mode for about 13 seconds after power on.
During the warm-up period, calculation and outputs are as follow:
•
Display:
does not display a flowrate. (Demonstration only)
•
Accumulative operation: no operation
•
Analog output:
outputs current over 20 mA during 200-300 ms
period. Then an instantaneous flowrate will be
output.
•
Pulse output:
no outputs
•
Communication:
no operation
14
Chapter 3. INSTALLATION, MOUNTING, WIRING
