Tripp Lite SUTX20K Owner's Manual page 33

6. Communication Interfaces
1 SMART Slot
Install an SNMP card in this SMART slot to remotely control and monitor the UPS status via a network. The Relay I/O or MODBUS
card may also utilise this slot to provide dry contact or MODBUS functionality, respectively.
2 Parallel Ports
The two parallel ports are for UPS parallel communication. A maximum of four UPS systems with the same capacity, voltage and
frequency may be coupled using the provided parallel cable to run in parallel mode.
3 Parallel Switch
When parallelling UPS systems, the DIP switches must be set up to activate the parallel function. The
parallel switch includes two DIP switches. To turn on a DIP switch, switch the DIP to the down position;
to turn off a DIP switch, switch the DIP to the up position.
1. When two UPS systems are paralleled, turn on each UPS DIP switches.
2. When three UPS systems are paralleled, turn off the middle UPS DIP switches and turn on the
remaining DIP switches.
3. When four UPS systems are paralleled, turn off the middle two DIP switches and turn on the
remaining DIP switches.
4 RS-232 Port
The RS-232 port is built into the UPS rear panel to provide communication between the UPS and a computer. It also provides dry
contact functions to indicate the UPS status. Use Tripp Lite's free PowerAlert
at www.tripplite.com/poweralert) to check and monitor the UPS status via a computer. Detailed information is as follows:
1. Monitors the load level, battery status, battery voltage, UPS operation mode, input voltage, input frequency, output voltage and
UPS temperature.
2. Sets shutdown delay time.
3. Enables/disables audible alerts.
4. Supports remote shutdown.
5. Pin Assignment:
1) Pin 2: TXD <Transmitting Data>
2) Pin 3: RXD <Receiving Data>
3) Pin 5: GND <Signal Ground>
6. Hardware
1) Baud Rate: 2400 BPS
2) Data Length: 8 bit
3) Stop Bit: 1 bit
4) Parity: None
Note: Other pins are reserved and cannot be used.
power management software (available for download
®
5 4 3 2 1
9 8 7 6
(Figure 6-3: RS-232 Port)
33
OFF
1 2
1 2
ON
ON
ON
(Figure 6-2: Parallel Switch)