- ETL - Energy Technology Laboratories Power Supply User Manual

page 60 -- MI00/10056 rev.1--05/2001
11.0 COMPUTER INTERFACE
11.1 AS400
The EDP70 PLUS UPS is fitted with a 9 pin female ‘D’ type socket for direct connection to a IBM AS/400
computer or equivalent, see figure 21. This facility can also be used with operating system software of other
manufacturers. The function of the pins on the socket are shown below:
Pin
Number
DESCRIPTION FUNCTION NUMBER
8 EDP70 PLUS UPS ON The UPS is supplying the load.
6 RESERVE TO LOAD The reserve AC supply is supplying the load.
9 UTILITY SUPPLY FAIL The AC utility supply to the UPS has failed.
7 BATTERY LOW The battery capacity is at a minimum and the
inverter will shortly shut down and the load will be
automatically transferred to the reserve AC supply.
5 COMMON All the above are connected to common when the
function is true.
Fig.21: EDP 70 Plus Computer Interface Pin Layout