Ebm Communication Ports; Dedicated Input Signals - Eaton 9PXM User Manual

Communication

EBM Communication Ports

External communication ports are located on the top rear panel of the EBM (see Figure 63). They are identified
as follows:
CN4 - External slot select signals and external CAN signals from UPS
l
CN3 - External slot select external CAN signals to next EBM
l
CN6 - External slot select Ret Act Pins (Do NOT install jumper)
l
CN5 - DB-9 (RS-232) port
l
CN12 - USB port
l
CN12 - USB Communication
Figure 64. EBM Communication Ports
Refer to detail A in Figure 31 on page 37 for the type of signal connectors used.

Dedicated Input Signals

Emergency Power-off (EPO): Connection to a facility Emergency Shutdown switch provides a method for
emergency Eaton 9PXM system shutdown. Opening this connection creates an immediate shutdown of the
Eaton 9PXM UPS output.
Maintenance Bypass: The signal from an external bypass switch, to isolate the Eaton 9PXM system for
maintenance purposes, tells the UPS to go into Internal Bypass mode.
On-Generator: An external signal can indicate that the input power is being supplied by a generator. Closure
of this contact causes the UPS to change preset values that are designed to optimize performance during
periods of generator instability:
See Figure 63 on page 69 to show the connections for all dedicated input signals.
70 Eaton 9PXM UPS (4-20 kVA) User's Guide P-164000669—Rev 05
Port
CN4 CN3
CN6
CN5 - DB-9 Communication Port