Eurotherm Controller - 3216 - Difference Between LR and RR Version of OP1 & OP2

RTFM.

_{Which is short for either "Read the ... manual" or "Ring the .... manufacturer".}

According to the short-form info from Farnell, the LR version has a logic output, while the RR has a relay output (OP1).

Depending on your application, the relay output may not be compatible with whatever's being driven (e.g. if it's a PWM output, a relay may not be able to switch quickly enough - just a guess).

I suggest you follow PW's sound advice, or get a refund on the RR and buy an LR version.

The L and R specify whether you have a logic or relay connection at this terminal...

http://www.newark.com/pdfs/datasheets/Eurotherm/3200_SERIES.pdf

ya you are right ..i have gone through the eng manual of the 3200 series eurotherm model..My concern is, my application is just controlling the heating of an equipment. I hope , whether its Logic or relay it should control the heating so i dont see a point in exchanging the eurotherm to logic from Relay. May be the responce can differ but it has to work rite ? so wondering what parameter i do need to change to what inorder to make it work as the Logic works fine for controlling the heating element.

I have checked even the configuration its OK as per the manual. I can see a relay attached to the eurotherm in place of logic (just physically compared both the relay and logice version). so wondering is there any diffence in external wiring style for logic and relay eurotherms?

Thanks alot for the message....appriciate your time and help.

LR tells us that it is logic output, 24 v DC that can drive a SSR (Solid State Relay), which inturn can be connected to the load. RR means a Relay output - potential free, which can be connected to load directly (load current within the tolerance of the contact rating of relay) or to a contactor if the load current is high, a safe and good practice that connecting directly. You do not hear any sound (click) in the first case (Logic), as the switching action is either source or sink from a transistor or similar semiconductor device. You would hear a click in case the relay output is triggered ON / OFF.

Output 1 and 2 are different outputs, which can be connected to two different control elements (Eg. Heat / Cool, etc.)

Trust I have clarified your query.

Madhav

9849169056

Mr. Madhav,

Thanks alot....