scc-rly01 conditioner compatability

[anengineer]

background:

I bought eight(8) SCC-RLY01 relays based on reading an early version manual

for same.  The early manual specified we could switch up to 250V AC using

the relays in our SCC-2345

I had planned on using it in our SCC-2345 to switch 110V AC(for a solenoid coil). 

We received the relays but I began to have second thoughts about trying to

switch 110V AC using them in our SCC-2345.  (We had originally telephoned NI

and they told us we _could_ use the relay modules with our SCC-2345 and that

it was an misprint in the manual.)

The _new_ manual for the SCC-RLY01 states I'm limited to 30V AC using the relays

 in our SCC-2345.  (The new manual also states if it is used with an SCC-68 the

relay _will_ handle up to 250V AC.)

Could someone confirm that we _can not_ use the relays with our SCC-2345 to

switch 110V?

[Jarrod_B.]

Hello anengineer,

You are correct that you should only use the SCC-RLY01 module in the SCC-68 to switch anything from 30V AC to 250V AC.  As stated in the SCC-RLY01 Relay Module User Guide on page 5, the module was derated to 30 V maximum switching voltage in the SC-2345.  The reason for this is that when used in the SC-2345, it doesn't meet Category II high voltage safety requirements.  Also, as noted in the User Guide, you must use the high-voltage backshell when connecting signals > 60 V DC to the relay module.

I hope this information helps!

Best regards,

[anengineer]

Thank you.....