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Is this a relay or something else?

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MaxHeadRoom78

Well-Known Member
One write up indicates electro-magnetic braking unit made by the company.
Is there also a dedicated controller for the motor apart from this unit?
Max.
 

AnalogKid

Well-Known Member
Most Helpful Member
The octal plug makes me think relay. It could be a solid state relay rather than electro-mechanical, but those usually have a heat conduction surface somewhere.

ak
 

MaxHeadRoom78

Well-Known Member
I see they also were heavy into brakes and clutches and drive mechanisms, possibly something allied to these.
Max.
 

Kal_B

Member
One write up indicates electro-magnetic braking unit made by the company.
Is there also a dedicated controller for the motor apart from this unit?
Max.
Hi Max,

Yes , it has one of those and one of those.
And there's a brake on the motor. I've been tasked to make some changes to the controller and trying to figure out what all these modules are. I take it one is a driver but I'm not sure what the rest are.
 

MaxHeadRoom78

Well-Known Member
The two boards are a 4 quadrant SCR drive that allows regenerative braking in the drive, the other is an interface card for the drive, I would imagine the mystery unit could be tied into the Electro-brake?
Max.
 

Kal_B

Member
Yep, I believe it's tied to the brake. I haven't fully traced the wires yet but I'm going to have to because the base broke into pieces when I pulled the "relay" out. It's a very old machine.
 

dr pepper

Well-Known Member
Most Helpful Member
Motor brakes tend to be Dc, so it might be a rectifier instead of or as well as a relay.
 
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