Relay for mesa cards
17 Jun 2016 09:31 #76200
by finemeca
Relay for mesa cards was created by finemeca
Hello,
I use a mesa-type 7i76 card.
Can I connect directly to the outputs of the electromagnetic type relay omron MY4 or should only SSR ?
Best regards,
Pierre
I use a mesa-type 7i76 card.
Can I connect directly to the outputs of the electromagnetic type relay omron MY4 or should only SSR ?
Best regards,
Pierre
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17 Jun 2016 12:38 #76213
by andypugh
Replied by andypugh on topic Relay for mesa cards
Which model of relay is it? There are many coil options in the MY range.
The 7i76 outputs can drive 300mA (with a 1.4A limit for any block of 8 outputs).
For a 24V coil relay in the MY range (38mA) there should be no problem, the 7i76 manual says
"This means that flyback diodes are not normally
required on small (less than 60 mA) inductive loads"
For 5V or 12V loads you would probably want to use a flyback diode. MY relays with part-numbers ending in "D2" have such a diode built in.
The 7i76 outputs can drive 300mA (with a 1.4A limit for any block of 8 outputs).
For a 24V coil relay in the MY range (38mA) there should be no problem, the 7i76 manual says
"This means that flyback diodes are not normally
required on small (less than 60 mA) inductive loads"
For 5V or 12V loads you would probably want to use a flyback diode. MY relays with part-numbers ending in "D2" have such a diode built in.
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17 Jun 2016 13:52 - 17 Jun 2016 13:56 #76219
by finemeca
Replied by finemeca on topic Relay for mesa cards
Last edit: 17 Jun 2016 13:56 by finemeca.
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17 Jun 2016 14:05 #76221
by andypugh
Replied by andypugh on topic Relay for mesa cards
The manual says that 60mA is fine without flyback diodes and 300mA is OK with flyback diodes. Either of the relays you have will be fine.
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17 Jun 2016 14:08 #76222
by finemeca
Replied by finemeca on topic Relay for mesa cards
Thank you. 
A problem solved
A problem solved
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