Re: Picked up wrong Watlow 935A.

Robert Harmon wrote:
I wasn't paying close enough attention & bid on a PID that isn't compatable
with SSRs.

I have: 935A-1CD0-000R
If I'm reading Watlow's spec sheet correctly this is for an elctro-
mechanical relay.

I need: 935A-1CK0-000R
If I'm reading Watlow's spec sheet correctly this is for a solid state
relay (SSR).

Just out of curiosity, is there any way to convert one to the other?
There's a lot of the first type avaliable on eBay & so few of the latter
that it would likely be worth the effort.

Robert (If it weren't for mistakes I'd nearly be perfect.) Harmon

Robert - what type of application were you going to use the PID
controller for? In particular, did you _really_ need the second
output? A single-boiler machine like a Silvia/Gaggia draws somewhere
in the ballpark of 7-10A of current (on a 110/120V circuit), which is
much higher than the ratings of either the mechanical relay / SSR.

The "typical" way to use these controllers is by using the DC
logic-level output from "Output 1", which both of these controllers
have (indicated by the "-1C" in the part numbers). This low current
output is used as an on/off switch for the DC side of an external SSR -
just find one rated for 20-40 A, and you're good to go!

Adam (Long time lurker, first time poster)

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