Marsh Industries MA1 high level alarm

[Timbo]

Has anyone fitted one of these? The instruction sheet has disappeared. Just need to know which terminals to connect the float switch to.

 

[telectrix]

Educated guess would be I/P 1 or I/P3,

 

[Timbo]

Thanks Tel. Plug connections are Com, I/P 1, I/P 2. The black wire from 0v on pcb is connected to I/P 1.
I'll do a bit of trial and error. Logic would suggest Com and I/P 1.......

 

[DPG]

That hard wired connections looks a bit of a bodge. Was it supplied like that?

 

[Timbo]

Yep, the mains flex on left, small black to the middle connector and the relay output to the beacon are all original.

 

[DPG]

Doesn't look like any strain relief on that mains cable either. Jeez I do moan a lot me.

 

[Timbo]

I have to admit to removing the flex gland as it is mounted on trunking.
I connected the float switch accross Com and I/P 2, pulled the float from the chamber and the alarm went off.
Thanks, everyone.