Apc SMARTSLOT DP300E User Manual download pdf (Page 33)

Specifications

Monitoring port

pin assignments

The Monitoring port is a 9-pin communications port. The

port operates with no flow control at a rate of 2400 baud.

The data format is 8 data bits with 1 start bit, 1 stop bit, and

no parity.

When the Triple Chassis operates with simple signaling, the

following limitations and capabilities apply to the Monitor-

ing port:

• Pins 3, 5, and 6 are open collector outputs which must

be pulled up to a common referenced supply no

greater than +

40 VDC

. The transistors are capable of

a non-inductive load of 25 mA. Use only Pin 4 as the

common.

• The output at Pin 2 generates a low-to-high RS-232

level when the device is signaling an On Battery con-

dition. The pin is normally at a low RS-232 level.

• The UPS is signaled to shut down when a high RS-

232 level is applied to Pin 1 for 4.5 seconds. Shut-

down is also dependent on the UPS status.

When the Triple Chassis operates with advanced signaling,

the following limitations and capabilities apply to the Moni-

toring port:

• Pin 7 is unassigned.

• DC operating voltage is available on Pin 8. This volt-

age may be from the UPS or from an external adapter,

whichever is greater.

Continued on next page

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 39 40

No comments

Apc SMARTSLOT DP300E User Manual Page 33