- Eaton UPS User's Guide

COMMUNICATION

Eaton 9170

UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality

DB-9 Communication Port

Table 13 explains the functions of the pins on the Eaton 9170+ DB-9

communication port. This port is on the Eaton 9170+ UPS rear panel, as

shown in Figure 49 on page 69.

Table 13. DB-9 Port Signals

Pin Function Description

1 Low Battery Alarm Pin 1 shifts from RS-232 Low (positive voltage) to RS-232 High (negative voltage) and

remains high whenever the UPS enters a Low Battery alarm state.

2 RS-232 Transmit Data Sends outgoing RS-232 communication data at 9600 baud, 8 bits, no parity, 1 stop bit.

3 RS-232 Receive Data/

RS-232 Shutdown

RS-232 Receive Data Function. Receives incoming RS-232 communication data at

9600 baud, 8 bits, no parity, 1 stop bit.

RS-232 Shutdown Function. If Pin 3 receives an RS-232 Low signal (+Vdc) for at

least 5 seconds, but not more than 7 seconds, during an AC Failure condition, the

UPS output shuts off following a delay of 120 seconds (±5 seconds).

S The UPS output shuts off even if the normal AC input power is restored during the

120 second delay.

S The UPS output automatically restarts after the UPS determines the normal AC

input power is stable.

S The shutdown and restart timing represented by the functionality of Pin 3 is

independent from the shutdown and restart timing specified from the host

software.

4 Reserved Loopback to Pin 6

5 Common Signal Ground

6 Reserved Loopback to Pin 4

7 No Connection Open pin

8 AC Fail Signal

(On-Battery)

Pin 8 shifts from RS-232 Low (positive voltage) to RS-232 High (negative voltage) and

remains high for 15 seconds (±1 second) after the UPS detects an AC Failure

condition, assuming the condition still exists after the 15 seconds.

When the AC Failure condition no longer exists, the signal returns to the RS-232 Low

state (positive voltage).

9 No Connection/

DC Supply Voltage

The UPS is factory-set with Pin 9 disconnected, but can be enabled through a

technician-replaceable jumper inside the UPS. The jumper setting MUST be

changed by a qualified service technician.

When enabled, Pin 9 provides supply voltage for use with external connectivity

devices requiring DC power directly from the UPS DB-9 port (nominal 12 Vdc/5W;

8V minimum, 24V maximum). Use only Eaton brand connectivity devices.