APC AP9225 User's Guide download pdf (Page 60)

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Product Information

Specifications

Basic port

interface

The following limitations and capabilities apply to the Basic port

interface (Ports

1–8

) of MasterSwitch plus:

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

up to a common referenced supply no greater than

+40 V

dc. The

transistors are capable of a maximum non-inductive load of

dc. Use only Pin

as the common.

• The output at Pin

generates a

-to-

HI RS-232

level when the

device is signaling an On Battery condition. The pin is normally at

LO RS-232

level.

• The MasterSwitch plus unit may be signaled to shut down the

UPS

by applying a

HI RS-232

level to Pin

for

4.5

seconds. Shutdown

is also dependent on the

UPS

status and the MasterSwitch plus

shutdown mode (see“MasterSwitchplus Properties” on page 12).

Basic port pin

assignments

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APC AP9225 User's Guide Page 60