Light Indication
When equipped with indicator light and surge voltage suppressor,
the light window turns orange when solenoid a is energised, and
it turns green when solenoid b is energised.
Changing Connector Entry Direction
Caution
Connector direction for electrical entry of D-sub connector and
fl at ribbon cable <IP40> can be changed. If the directional
change is required, slide the lever on the side of the connector
block to the FREE position, and then change the direction as
shown in the fi gure. Also, before connecting the connector, be
sure to return the lever to the LOCK position. (If the lever is
diffi cult to slide, move the connector a little bit to make it easier to
slide the lever.)
If an excessive force is applied on the connector in the LOCK
position, the connector block may be damaged. Also, using in
such a way that the connector fl oats in the FREE position, it may
cause the lead wire, etc., to break.
∗
Direction cannot be changed for D-sub connector <IP67> or
compact type.
Caution
FREE
LOCK
Surge voltage intrusion
With non-polar type valves, at times of sudden interruption of
the loading power supply, such as emergency shutdown,
surge voltage intrusion may be generated from loading
equipment with a large capacity (power consumption), and the
valve in a de-energised state may switch over (see Figure 1).
When installing a breaker circuit for the loading power supply,
consider using a valve with polarity (with polarity protection
diode), or install a surge absorption diode between the loading
equipment COM line and the output equipment COM line (see
Figure 2).
Figure 2. Surge intrusion countermeasure example
(NPN outlet example) (24 VDC)
Countermeasure for Surge Voltage Intrusion
Figure 1. Surge intrusion circuit example
(NPN outlet example) (24 VDC)
JSY1000/3000/5000
Series
Specifi c Product Precautions 3
Be sure to read this before handling the products. Refer to the back cover for safety instructions.
For 3/4/5-port solenoid valve precautions, refer to the “Handling Precautions for SMC Products”
and the “Operation Manual” on the SMC website: https://www.smc.eu
Caution
Light
A side: Orange
B side: Green
Solenoid a
Solenoid b
Light
A side: Orange
B side: Green
Solenoid a
Solenoid b
R
R
R
24 VDC
−60 V
24 V
0 V
−60 V
24 V
0 V
−60 V
24 V
0 V
Output circuit
Surge voltage
Surge voltage
sol.1: Energised
sol.2: De-energised
Large capacity
load: Energised
Relay
Power supply circuit breaker
Surge voltage
Internal circuit
24 VDC
−2 V
24 V
0 V
−2 V
24 V
0 V
−2 V
24 V
0 V
Output circuit
Surge voltage
Surge voltage
sol.1: Energised
sol.2: De-energised
Large capacity
load: Energised
Diode
– (Anode)
+ (Cathode)
Countermeasure
parts
Relay
Power supply circuit breaker
Surge voltage
Internal circuit
139