LessThanThree
Member
I am upgrading a directlogic system to Point IO on a controllogic platform and have ran into an interesting challenge.
The temperature control is done by by sending a +24vdc signal to the T1 terminal in a Honeywell Modutrol IV motor M9484F1023. The T2 is wired to the channel 1 + side of the 4-20mA analog output module. The negative side of the channel is connected to the 24vdc common. Please see attached schematic if this is not clear.
I have tried wiring the new module to feed a 4-20mA, 24vdc signal directly to the modulating motor but the equipment will not move. When I wire with the same setup as the exising parts my module faults with an error that a signal less than 1mA being generated.
I have attached the relevant schematics. I apologies for the picture quality. They are from the only known version which was a fax over a decade ago.
I am trying to understand why it is wired the way it is and how we can make it work with the new equipment.
Any suggestions for strategies or equipment would be greatly appreciated.
Link to the Honeywell motor:
https://customer.honeywell.com/en-US/pages/product.aspx?cat=HonECC Catalog&pid=M9484F1023/U
Link to existing module:
http://www.automationdirect.com/static/manuals/d2anlg/d2anlg.html
Link to replacement module:
http://literature.rockwellautomation.com/idc/groups/literature/documents/in/1734-in034_-en-p.pdf
The temperature control is done by by sending a +24vdc signal to the T1 terminal in a Honeywell Modutrol IV motor M9484F1023. The T2 is wired to the channel 1 + side of the 4-20mA analog output module. The negative side of the channel is connected to the 24vdc common. Please see attached schematic if this is not clear.
I have tried wiring the new module to feed a 4-20mA, 24vdc signal directly to the modulating motor but the equipment will not move. When I wire with the same setup as the exising parts my module faults with an error that a signal less than 1mA being generated.
I have attached the relevant schematics. I apologies for the picture quality. They are from the only known version which was a fax over a decade ago.
I am trying to understand why it is wired the way it is and how we can make it work with the new equipment.
Any suggestions for strategies or equipment would be greatly appreciated.
Link to the Honeywell motor:
https://customer.honeywell.com/en-US/pages/product.aspx?cat=HonECC Catalog&pid=M9484F1023/U
Link to existing module:
http://www.automationdirect.com/static/manuals/d2anlg/d2anlg.html
Link to replacement module:
http://literature.rockwellautomation.com/idc/groups/literature/documents/in/1734-in034_-en-p.pdf