ENGLISH
7
Communication Port Pin-Outs
SMT 420 only
Pin 1: Shutdown: A +12 VDC signal held for 5 seconds
on this pin while the unit is on battery shuts down
the unit 120 seconds later. The unit restarts after a
10-second delay when acceptable power is restored.
Pin 2: No Connection.
Pin 3: Inverter Normally Open Contact: Closes when
the unit is on battery power.
Pin 4: Common: Signal ground for all interface signals and contacts.
Pin 5: Low Runtime Normally Open Contact: Closes when battery runtime is low.
Pin 6: Inverter Normally Closed Contact: Opens when the unit is on battery power.
Pin 7: No Connection.
Pin 8: Available Input to Processor: Reserved for factory testing.
Pin 9: Not used.
Contacts consist of open collector circuits capable of switching up to +30 VDC 6 mA
resistive load.
Best Power offers interface kits that allow you to connect your computer system to the
Patriot unit’s communication port. Best Power has interface cables for many systems,
including the following:
Banyan VINES
DOS PCs
Novell NetWare
IBM RS/6000 AIX
IBM AS/400
OS/2
UNIX and Compatible Systems
SCO UNIX/XENIX
LAN Manager/Server v2.0
Lantastic v4.0
For a free CheckUPS software package for your specific operating system, complete and
return the coupon included with your unit.
For the latest specific information on Best Power interface kits, call Best Power’s
Worldwide Service or your Best Power dealer.
