rQx
Lifetime Supporting Member
Hi,
I'm trying to get some ideas as to why some of our relays are not working properly.
The socket is 700-HN222 from Allen Bradley and the relay is 700-HK (24VDC) series also Allen Bradley.
We sell our cabinet to a manufacturer of machines and their maintenance personell is telling me that the "relay don't work".
They have to take the relay out and put it back in again, and then it will work again.
From what they tell me it seems like it is one of the two poles that doesn't switch when getting power to the relay. Atleast in that case
The relay itself have no signs of corrossion on the pins.
The relay are located in Egypt in "unpowered" machines. They just power them up for tests and on a quite regular basis they have to take the relays out and put it back in again.
I was thinking that the cabinets was getting wet inside because of the temperature diffrence between night and day but they say that all the papers inside the cabinet is fine. If it would be water inside the cabinet the papers would be somewhat damaged.
So I'm down to that I wan't to have a socket that I can open and se if there is any problem. But since there is no sign of corrosion on the relay I don't think this is the problem. But then again it's unlikely that the one pole would "stick" since they just pull it out and back in again.
As I understand gold plated contacts is better for corrosion? But will the pins also be gold plated? IF the problem is in the socket connection then it would be no good. Also, there are 1700pcs at site so want to avoid changing them.
We have never had this problem but once, that also in Kuwait with a cabinet with no power to it. When they powered it up they had to pull all relays and put them in again.
Thankfull for any ideas
I'm trying to get some ideas as to why some of our relays are not working properly.
The socket is 700-HN222 from Allen Bradley and the relay is 700-HK (24VDC) series also Allen Bradley.
We sell our cabinet to a manufacturer of machines and their maintenance personell is telling me that the "relay don't work".
They have to take the relay out and put it back in again, and then it will work again.
From what they tell me it seems like it is one of the two poles that doesn't switch when getting power to the relay. Atleast in that case
The relay itself have no signs of corrossion on the pins.
The relay are located in Egypt in "unpowered" machines. They just power them up for tests and on a quite regular basis they have to take the relays out and put it back in again.
I was thinking that the cabinets was getting wet inside because of the temperature diffrence between night and day but they say that all the papers inside the cabinet is fine. If it would be water inside the cabinet the papers would be somewhat damaged.
So I'm down to that I wan't to have a socket that I can open and se if there is any problem. But since there is no sign of corrosion on the relay I don't think this is the problem. But then again it's unlikely that the one pole would "stick" since they just pull it out and back in again.
As I understand gold plated contacts is better for corrosion? But will the pins also be gold plated? IF the problem is in the socket connection then it would be no good. Also, there are 1700pcs at site so want to avoid changing them.
We have never had this problem but once, that also in Kuwait with a cabinet with no power to it. When they powered it up they had to pull all relays and put them in again.
Thankfull for any ideas