HP PCI Multiplexer Family Cabling, Diagnostics, and Troubleshooting Manual

Port to Device Cabling
Cabling for UPS and Disc Arrays
Chapter 4 57
Cabling for UPS and Disc Arrays
There are two UPS cabling solutions for the PCI MUX:
1. For the DB25 type MUX (J2485A), a new cable ordered as option 022
with the UPS products, may be used to directly connect to PCI MUX
DB25 type port module.
2. Alternatively, for the DB25 type MUX (J2485A), it requires a NULL
Modem converter of DB25F to DB25M, crossing pins 2 and 3 (receive and
transmit), and straight through on pin 7. For the UPS application, only
pins 2, 3 and 7 are required.