Vertiv Liebert STS2/PDU - RS-232 Port

Vertiv™ | Liebert
®
STS2
™
100-1000A, 50/60Hz User Manual | Rev. 12 | 11/2017 110
15.2.9 RS-232 Port
The unit is equipped with an RS-232 port for connecting a terminal or PC. See Figure 26 for the port’s location.
See 12.1 - Using the RS-232 Port for instructions on using a PC terminal with the unit.
15.2.10 Terminal Port Connections
The system has an asynchronous serial port configured as Data Terminal Equipment for terminal access only
(half duplex). The CPU services the terminal port with no handshaking. The serial port conforms to RS-232 levels.
The serial port is 1000VDC isolated (non-SELV) and ESD protected to 15kV air discharge. The connector is a 6
Pin MTA plug with connections shown below.
A DB9 male connector is added and connected parallel to the 6 position header. It is configured as DTE.
15.2.11 RS-232 Interface Parameters
The service terminal interface parameters are the following settings and cannot be changed.
Table 17 MTA plug pin-out
Pin
Signal Name Function / Comments
1 ISO_GND Isolated service terminal ground
2 ISO_TXD Isolated service terminal transmit output
3 ISO_RXD Isolated service terminal receive input
4 NC No Connection
5 NC No Connection
6 NC No Connection
Table 18 DB9 pin-out
Pin
Signal Name Function / Comments
1 NC No Connection
2 ISO_RXD Isolated service terminal transmit output
3 ISO_TXD Isolated service terminal receive input
4 NC No Connection
5 ISO_GND Isolated service terminal ground
6 NC No Connection
7 NC No Connection
8 NC No Connection
9 NC No Connection
Table 19 RS-232 settings
Parameter Setting
Interface RS-232 Using EIA Voltage Levels
Baud Rate 9600
Parity None
Number of Data Bits 8
Number of Stop Bits 1
Hardware Flow Control Off
Terminator <CR> <LF>
Handshaking Not supported
Structure Full duplex
Local Echo Off