Square Wave 745NC Non-Contact Dispense Valve
4
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Installation
1. Mount valve utilizing the M4 mount hole on actuation body.
2. Connect fluid supply line to fluid inlet fitting using 0.125" ID tubing.
3. Connect fluid supply line to reservoir.
4. Connect valve control air to a constant air source between 4.8–6.3 bar (70–90 psi).
The Square Wave 745NC valve is recommended to be actuated using a spike and hold driver circuit.
The valve requires a 24 VDC pulse for 1 ms minimum to actuate the valve. This is then reduced to
5 VDC for the remaining period that the valve is open.
CAUTION
Failure to reduce the voltage will result in permanent damage to the actuation solenoid if the valve is left
on longer than 30 ms.
To avoid damaging the actuation solenoid, do not cycle the valve at continuous high frequencies for
periods greater than 30 minutes. The actuation solenoid requires periodic dwell time to protect coil
integrity and performance.
Signal parameters:
Minimum on time: 1 ms
Minimum off time: 1 ms
Spike voltage (supply): 24 VDC
Hold voltage: 5 VDC
High current magnitude: 1.0 Amp
Maximum hold current: 300 mA
Minimum operating frequency:
100Hz (see Figure #1 below for frequency/duty cycle capability of 24W valve)
Maximum operating frequency: 500Hz
Frequency
(Hz)
Duty Cycle
30%
40%
50%
60%
70%
100
150
200
250
300
350
n/a
400
n/a
n/a
450
n/a
n/a
500
n/a
n/a
n/a
Figure 1
