[Apcupsd-users] Modbus-capable APC SMT UPSes

[Jonathan Woithe]

Hi all

For a number of years our company has been shipping APC SUA1000RMI2U UPSes
as part of our products. Monitoring of the UPS is via serial. We have now
been informed by our supplier that they cannot obtain these UPSes any more.

They have suggested the SMT1000RMI2U as a replacement. However, I recall
that the SMT series were tangled up with their proprietary serial protocol a
few years back. Since then APC have introduced their modbus protocol and I
am aware that recent versions of apcupsd support this.

I recall reading somewhere in the past that not all the SMT UPSes can have
their firmware upgraded post-sale to support modbus. Does anyone know
whether SMT1000RMI2U supports field upgrades to include modbus support? In
addition, is it known which firmware version introduced the modbus support
on the SMT1000RMI2U (knowing this would allow us to avoid upgrading UPS
firmware needlessly).

Regards
jonathan

[Ted Mittelstaedt]

Hi Jonathan,

The SMT1000RMI2U should work. According to the following document on
MODBUS:

http://www.apcmedia.com/salestools/MPAO-98KJ7F/MPAO-98KJ7F_R1_EN.pdf?sdirect=true

"Products Supported
Most APC Smart-UPS in the SMT family and all models in the SRT family
are supported. SMT rack mount 1U models are not supported and only SMT
models running firmware greater than UPS 09.0 are supported. SMT models
with UPS 08.0 or higher may be updated. See Knowledge Base article
FA164737 on APC.com for information on firmware updates."

Please refer to the following URL:

http://www.schneider-electric.us/sites/us/en/support/faq/faq_main.page?page=content&country=ITB&lang=EN&id=FA164737&locale=en_US&redirect=true


Ted

Post by Jonathan Woithe
Hi all
For a number of years our company has been shipping APC SUA1000RMI2U UPSes
as part of our products. Monitoring of the UPS is via serial. We have now
been informed by our supplier that they cannot obtain these UPSes any more.
They have suggested the SMT1000RMI2U as a replacement. However, I recall
that the SMT series were tangled up with their proprietary serial protocol a
few years back. Since then APC have introduced their modbus protocol and I
am aware that recent versions of apcupsd support this.
I recall reading somewhere in the past that not all the SMT UPSes can have
their firmware upgraded post-sale to support modbus. Does anyone know
whether SMT1000RMI2U supports field upgrades to include modbus support? In
addition, is it known which firmware version introduced the modbus support
on the SMT1000RMI2U (knowing this would allow us to avoid upgrading UPS
firmware needlessly).
Regards
jonathan
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[Jonathan Woithe]

Hi Ted

Post by Ted Mittelstaedt
The SMT1000RMI2U should work. According to the following document on

Thanks very much for this information - exactly what I was looking for.

Regards
jonathan