Emerson Exchange 365

What method of hazardous area protection is required (if any)? Is your power supply a nominal 24V DC or some other value?

In reply to Leon Trunecka:

Hello Jonathan,

I received this response from level specialist, Brian Sorenson, via email but will share for him until he and his team are able to join the community. :)

Each 751 will add less than 10 ohms loop resistance in the loop and if the displays were removed or damaged, the current would go through the diode and drop the voltage by 0.7 volts for each 751. Worst case would a 2.8 vdc voltage drop counting all 4 remote indicators. Basically you just need to keep at least 10.5 vdc at the transmitters terminals to keep the transmitter powered. Max output of the transmitter should be considered 23 mA. You could multiply this x loop resistance to get your total voltage drop and subtract from the power supply voltage.

Brian Sorenson

Best Regards,

Rachelle McWright: Business Development Manager, Dynamic Simulation: U.S. Gulf Coast

In reply to Rachelle McWright:

Hi Leon : It's located in Zone 1 and 24VDC power supply.

Hi Rachelle/Brian : Thanks for the help and reply. It helps and i'm pretty clear on this. Just to go a bit further on this, can i check if this concept is the same if i connect the 751 onto the test terminals of the 3051S, i.e. connect in parallel instead of series.

Once again, thank you so much for the replies.