Relay Module help

So I have a 30 amp mechanical relay that should work with my arduino or pi. I am confused as to the terminal markings. If I am reading right the leftmost pin at the top (out of each 3) is the common, the second from left being normally open with the third being normally closed.
With other relays I have used I just run power to the common, and then the switched leg from the normally open pin. This just looks odd. It threw me off that there are two middle pins that look like they are for a load as well? I just want to run 110 20 amp power to the common pin and switch it on and off

Got a pic of the other side?

Those lines on the top indicate a normally closed terminal with the toggle going to the other side when power is activated. So the left is normally closed contact (turns off when power to the coil), middle is the one that activates when power is applied to the coil and the right one is the input to be switched.

Renfro said:

Got a pic of the other side?

Those lines on the top indicate a normally closed terminal with the toggle going to the other side when power is activated. So the left is normally closed contact (turns off when power to the coil), middle is the one that activates when power is applied to the coil and the right one is the input to be switched.

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Ah i was seeing the left one as input/common pin...still dont know what the middle 2 are. The other side of it where the signals hook in is simple gnd 5v ch1 ch2 low level trigger since jumper is applied to low level

Sure wish I could read those numbers on the relays and board.

Looks to me like the middle pins are AC voltage input to be converted into low level 5VDC (by that little board in the middle with the tiny transformer on it) to use as switched voltage that comes back from the "limit switch" to trigger the coil on the relays.