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Eaton 9170
+
UPS (3–18 kVA) User's Guide S 164201393 Rev E www.eaton.com/powerquality
92
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.