Input Circuit; E.4 Power Supply Conditions; E.4.1 Input Circuit - Fujitsu SPARC Enterprise M5000 Service Manual

UPS Interface Signals
TABLE E-1
Signal Name Definitions
*BPS/*UALM Signal indicates faulty UPS conditions
*BTL Signal provides a warning of a low battery level
and a pending UPS failure.
*ACOFF Signal indicates power failure at the commercial
AC supply connector to the UPS
SG Signal ground
ER Signal indicates the main unit is running
(Equipment Ready)
ON:Indicates contacts are closed
OFF: Indicates contacts are open
Note1: Use a UPS capable of normal battery power supply operation for at least 10 to 60 seconds after this signal is turned on.
Note2: Use a UPS capable of normal battery power supply output without turning on the *ACOFF in an instantaneous commercial AC
power failure lasting two seconds or less.
E.4 Power Supply Conditions
TABLE E-2
E.4.1

Input circuit

TABLE E-2
Signal Name
*BPS/*UALM
*BTL
*ACOFF
Limit the signal-line chatter period to 1ms or less.
and list the electrical specifications for the UPS interface.
TABLE E-3
Electrical Specifications
Input Conditions
No voltage relay contact
Contact rating DC 12 V, 10 mA or more (maximum 0.5A)
Use of metallic contact, or lead relay is recommended.
Pin Number Remarks
6 Normal: OFF
Failure: ON
7 Normal: OFF
Warning: ON
(Note1)
9 Normal: OFF
Power failure: ON
(Note2)
5
1 Do not connect to ER
signal pin.
Appendix E UPS Controller E-3