AB Safety Relay MSR-125HP problem

Shubho Bhattacharya

Member

S

Join Date

Jun 2021

Location

Kolkata

Posts

3

• Jun 15, 2021

• #1

Hi, I'm facing problem with AB GuardMaster Safety Relay (MSR-125HP 440R-D23171).

I'm working on a project that has Safety Catagory-3 Door Lock switches and Emergency stop switches. If any safety issue occurred i.e. if any one of the switches is activated then the CH-1 & CH-2 output of the Safety Relay (13-14, 23-24) will be disconnected. After closing the safety issue and after manual Reset the safety relay returned to its normal condition.

As per the datasheet I have connected the relay with my safety circuit. But CH-1 & CH-2 are not latched.

 

parky

Member

P

Join Date

Oct 2004

Location

Midlands

Posts

5,729

• Jun 15, 2021

• #2

This is not a normal safety unit it is a two button operator interlock are you sure you have the right unit for the application.

 

Shubho Bhattacharya

Member

OP

S

Join Date

Jun 2021

Location

Kolkata

Posts

3

• Jun 15, 2021

• #3

parky said:

This is not a normal safety unit it is a two button operator interlock are you sure you have the right unit for the application.

Click to expand...

Thanks for your input.
The right unit is defined for the Emergency switches.

Is it correct?

 

JesperMP

Lifetime Supporting Member + Moderator

Join Date

Feb 2003

Location

ᚴᚬᛒᛅᚾᚼᚬᚠᚾ

Posts

16,286

• Jun 15, 2021

• #4

It is the wrong relay. Look in the user manual. It describes that it is intended for 2-hand control.

 

Shubho Bhattacharya

Member

OP

S

Join Date

Jun 2021

Location

Kolkata

Posts

3

• Jun 15, 2021

• #5

JesperMP said:

It is the wrong relay. Look in the user manual. It describes that it is intended for 2-hand control.

Click to expand...

Okay. I understand.

Can I use Guard Master SI module (GSR SI - 440R-S12R2) instead of it?

 

EastSideSquirrel

Member

E

Join Date

Aug 2019

Location

Krong

Posts

27

• Jun 15, 2021

• #6

I won't give you a yes or no answer, but...
Have a look at the AB literature, they have good wiring examples for this.

Search Publication 440R-UM013E-EN-P – March 2017 to find
https://literature.rockwellautomation.com/idc/groups/literature/documents/um/440r-um013_-en-p.pdf

Search Rockwell Automation Publication SAFETY-WD001L-EN-P - March 2020
https://literature.rockwellautomation.com/idc/groups/literature/documents/wd/safety-wd001_-en-p.pdf

You will find the relay part number you suggested (440R-S12R2) in there.