I'm trying to understand relays in this circuit. It's a kill switch operated battery isolator. R1 is a TE high current relay and R2 is a 30 amp automotive relay.
The battery is connected to terminals 5 (not labelled) and 2 of R1 and 86 of R2. In the resting state, the coil circuit of the R1 relay and the R2 relay are both not energised and there is no ground path. No power out to the car/starter.
I'm confused about continuity. Terminal 1 of R1 and 30 of R2 appears to be connected to terminal 2 on R1 through the coil circuit of R2. Likewise, terminal 85 and 30 of R2 and terminal 1 of R1 appears to be connected through the coil circuit of R1. I assume R1 and R2 are not activated because there is no current flow to ground. I assume it is wired this way as it is ground dependent, ie through S1 and/or S2/S3.
Now, pushing S1, the 'Green On' momentary switch, energises the coil of the R2 'Hold on' relay. This creates a ground path through pin 87 of the R2 relay to energise the coil circuit of R1 through pin 1. Power is sent to the car/engine. R2 is held on by ground path 85 to 30 through the relay to 87 to ground. Is this correct?
If either of the 'Red Off' switches are pushed, the ground path through pin 87 of the 'Hold on' relay is cut. Power is cut to the coil circuit of R1, cutting power to the car, starter motor and the 'Negative Cut trigger'.
Now I assume the 'Negative Cut trigger' is wired to the terminal 85 of a conventionally wired relay, eg a fuel pump relay or a coil relay to kill the engine.
The battery is connected to terminals 5 (not labelled) and 2 of R1 and 86 of R2. In the resting state, the coil circuit of the R1 relay and the R2 relay are both not energised and there is no ground path. No power out to the car/starter.
I'm confused about continuity. Terminal 1 of R1 and 30 of R2 appears to be connected to terminal 2 on R1 through the coil circuit of R2. Likewise, terminal 85 and 30 of R2 and terminal 1 of R1 appears to be connected through the coil circuit of R1. I assume R1 and R2 are not activated because there is no current flow to ground. I assume it is wired this way as it is ground dependent, ie through S1 and/or S2/S3.
Now, pushing S1, the 'Green On' momentary switch, energises the coil of the R2 'Hold on' relay. This creates a ground path through pin 87 of the R2 relay to energise the coil circuit of R1 through pin 1. Power is sent to the car/engine. R2 is held on by ground path 85 to 30 through the relay to 87 to ground. Is this correct?
If either of the 'Red Off' switches are pushed, the ground path through pin 87 of the 'Hold on' relay is cut. Power is cut to the coil circuit of R1, cutting power to the car, starter motor and the 'Negative Cut trigger'.
Now I assume the 'Negative Cut trigger' is wired to the terminal 85 of a conventionally wired relay, eg a fuel pump relay or a coil relay to kill the engine.
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