YOKOGAWA PUS400G, User Manual

< 2. Installation and Wiring >

2-5

IM 19C1B3-01E

2.2.3  Connecting Ultrasonic Vibrator Cable

Connect the cable of the ultrasonic vibrator (power line for ultrasonic vibrator) to Terminals U1, U2 and 

S on the PUS400G ultrasonic oscillator.
The ultrasonic vibrator cable must be connected direct to the terminals on the ultrasonic oscillator. 

If the length of the ultrasonic vibrator cable is insufficient, shift the location of the installation of the 

ultrasonic oscillator close to the pH holder.

The ultrasonic vibrator cable is provided with a cable gland (JIS A8 or equivalent).

This cable gland is unnecessary if the ultrasonic vibrator cable is connected to the PUS400G 

ultrasonic oscillator. Remove it or shift it to a position where wiring work will not be interfered with.

2.2.4  Power Supply Wiring 

Use a two-core cable with a conductor nominal cross-sectional area of 0.5 mm

2

 or above for power 

supply wiring.

Connect the cable from a power supply having a specified voltage (voltage fluctuation: within a range 

of ±10% of nominal voltage) to Terminal L1 and L2 on the ultrasonic vibrator.

Note:  If the supply voltage drops below the allowable range, the power of ultrasonic waves is 

weakened, which may result in the degradation in cleaning effect.
The screw size of the terminals is M4. Use a crimp contact conformable to the size for cable 

termination.
Place in the power supply wiring a switch for shutting off the power supply to the ultrasonic oscillator. 

With this switch provided, safety is ensured when the wires are removed from the ultrasonic oscillator 

for repair or the like. Use the power switch inside the PUS400G ultrasonic oscillator to start or stop it 

for or during steady state operation.

In the case of PUS400G-NN-KC (for Korea), please wire a noise filter assembly by all means.

2.2.5  Ground Wiring 

The PUS400G ultrasonic oscillator should be grounded to earth (grounding resistance: 100Ω or 

below). Use a conductor with a nominal cross-sectional area of 2 mm

2

 or above. The grounding 

terminal is located on the left side at the lower part of the case (when viewed from front) (Refer to the 

external dimensions on Sec. 1.3.) The terminal uses a M4 screw.