User`s manual

7-27

Calculate the value R of the bleeder resistance in the following formula:

V: Power supply voltage

I: Minimum action current of the output module

Then, the capacity of R (W) is

(5) OFF delay time when the DC output module drives the induced load

When the DC output module with a built-in cramp diode is used as a surge killer to drive the

induced load of direct current such as electro-magnetic valves and solenoid valves, it may be

impossible to complete high-speed switching due to the delay of response, since electric current

goes to the load through the cramp diode. In such a case, the DC output module with a built-in

zener diode, instead of the cramp diode, could speed up the response.

DC output module with a built-in zener diode

JW-212SA

(6) When miniature load is driven by a relay output

The relay used in the relay output module is suitable for power drive, and so with a low voltage and

small current such as 24 VDC and 10mA, the contact reliability of the contact point drops. In such

a case, we recommend to use a DC output module (transistor output). When connection with a low

voltage and small current contact point output cannot be avoided, the following connection should

be made: A miniature relay with a reliable contact point under low voltage and small current is

driven, and the contact is made at that contact point.

R＜

W＞

×3

Margin

Output module

Load

DC output module

Connected device

Relay output module

Connected device