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david(at)carter.net
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 Posted: Sat Sep 19, 2020 11:40 am Post subject: S701-1 master relay wiring? |
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The attached picture is as received from B&C. According to the enclosed wiring instructions / picture, it appears to be wired backwards. The jumper wire is on the wrong side, and the diode appears to be backwards. Anyone else seen this? I'll put it on the test bench & verify the connections before I install it.
[img]cid:174a7ddb106b24c5b681[/img]
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David Carter
david(at)carter.net (david(at)carter.net)
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kjashton(at)vnet.net
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| Posted: Sat Sep 19, 2020 1:25 pm Post subject: S701-1 master relay wiring? |
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The contactor can work in either direction so each picture is wired correctly. For the second pic, “from the battery” would be on the right” and “master switch” on the left. I will be embarrassed if Bob says otherwise. 
The diode works so that when the the master switch is turned off, the coil current collapses creating a surge but the surge cannot return to arc the master switch contacts. It can only go towards the battery which does not care.
-Kent
| Quote: | On Sep 19, 2020, at 3:36 PM, David Carter <david(at)carter.net> wrote:
The attached picture is as received from B&C. According to the enclosed wiring instructions / picture, it appears to be wired backwards. The jumper wire is on the wrong side, and the diode appears to be backwards. Anyone else seen this? I'll put it on the test bench & verify the connections before I install it.
<IMG_6189.jpg>
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David Carter
david(at)carter.net
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nuckolls.bob(at)aeroelect
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| Posted: Sat Sep 19, 2020 2:38 pm Post subject: S701-1 master relay wiring? |
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At 02:36 PM 9/19/2020, you wrote:
| Quote: | | The attached picture is as received from B&C. According to the enclosed wiring instructions / picture, it appears to be wired backwards. The jumper wire is on the wrong side, and the diode appears to be backwards. Anyone else seen this? I'll put it on the test bench & verify the connections before I install it. |
The contactor IS a symmetrical device.
If for mechanical reasons one wished to
reverse the input/output functons of the
main terminals, you could flip the diode
and move the jumper to the other side.
But if installation mechanics are no issue
then the device is correctly configured
as supplied and yes, the illustration
describes the ALTERNATE but equally functional
condition.
Bob . . .
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argoldman(at)aol.com
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| Posted: Sat Sep 19, 2020 4:10 pm Post subject: S701-1 master relay wiring? |
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Dave,
Perhaps the picture reflects that the master relay is activated by connecting the pole to ground not 12v
If that were not the case, you would need to turn on the master switch to then turn on the master switch.
This also prevents the necessity to always have a constant hot wire to the panel. What could possibly go wrong with that?
Rich
Sent from my iPhone
On Sep 19, 2020, at 2:36 PM, David Carter <david(at)carter.net (david(at)carter.net)> wrote:
| Quote: | The attached picture is as received from B&C. According to the enclosed wiring instructions / picture, it appears to be wired backwards. The jumper wire is on the wrong side, and the diode appears to be backwards. Anyone else seen this? I'll put it on the test bench & verify the connections before I install it.
<IMG_6189.jpg>
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David Carter
david(at)carter.net (david(at)carter.net)
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user9253
Joined: 28 Mar 2008
Posts: 1921
Location: Riley TWP Michigan
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| Posted: Sat Sep 19, 2020 4:54 pm Post subject: Re: S701-1 master relay wiring? |
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Arc suppression diodes are always wired with the banded end connected to positive.
The diagram is correct.
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Joe Gores |
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ceengland7(at)gmail.com
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| Posted: Sun Sep 20, 2020 5:11 am Post subject: S701-1 master relay wiring? |
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Just to be sure all bases are covered...
If the diode & jumper are reversed, the battery connection and switch connection will be reversed, as well. The master switch is the only switch that's in the 'ground side' of a circuit. Instead of supplying power to the device (relay coil, in this case), it completes the circuit to ground. That avoids having an extra 'hot' wire making the long run to the switch, and avoids the need to protect the wire with a fuse/breaker.
Charlie
On Sun, Sep 20, 2020 at 7:18 AM Kent or Jackie Ashton <kjashton(at)vnet.net (kjashton(at)vnet.net)> wrote:
| Quote: | --> AeroElectric-List message posted by: Kent or Jackie Ashton <kjashton(at)vnet.net (kjashton(at)vnet.net)>
The contactor can work in either direction so each picture is wired correctly. For the second pic, “from the battery” would be on the right” and “master switch” on the left. I will be embarrassed if Bob says otherwise.
The diode works so that when the the master switch is turned off, the coil current collapses creating a surge but the surge cannot return to arc the master switch contacts. It can only go towards the battery which does not care.
-Kent
> On Sep 19, 2020, at 3:36 PM, David Carter <david(at)carter.net (david(at)carter.net)> wrote:
>
> The attached picture is as received from B&C. According to the enclosed wiring instructions / picture, it appears to be wired backwards. The jumper wire is on the wrong side, and the diode appears to be backwards. Anyone else seen this? I'll put it on the test bench & verify the connections before I install it.
>
> <IMG_6189.jpg>
> --
> ---
> David Carter
> david(at)carter.net (david(at)carter.net)
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