ET200ISP 4 DO 6ES7132-7GD30-0AB0 Concern connect 2 DO parallel

Dear Sir,

As design, We have one DO channel connect to solenoid valve but after 2 years operation. Now DO can't supply enough current to solenoid. 

We try to connect 2 DO parallel to this solenoid and solenoid operate normally but we're worry about I.S circuit.

As manual of this card:

DO: Maximum current per channel is 22mA. 2 channel parallel use about 38mA.

Hello,

really maybe simple help, put resistor vith suitable value to slow current.

hi duongvuquy,

your worries are reasonable.

See the Technical Data of the module:

For other modules it is allowed to do it, like 6ES7132-7GD21-0AB0.

I don´t know what the differences between these modules and what to do. I would be careful with this, 

hope this helps,

regards,

I just worried about Instrinsically Safe (EX ia circuit). 2 DO parallel will violate ex ia standard in this case?

I see other card: 6ES7132-7GD10-0AB0 support 2 DO parallel for EX ia Circuit.

yes, the other card, 6ES7132-7GD10-0AB0, supports parallel-switching of two outputs. 

But maybe you don´t need it with this card. It has a bigger output current, 27mA. 

regards,