15.2.9 Rs-232 Port; Terminal Port Connections; Table 22 Mta Plug Pinout; Table 23 Db9 Pinout - Liebert POWER PROTECTION STATIC TRANSFER SWITCH User Manual

15.2.9 RS-232 Port

The unit is equipped with an RS-232 port for connecting a terminal or PC.
See Figure 29 for the port's location.
See 12.1 - Using the RS-232 Port for instructions on using a PC terminal with the unit.

15.2.10Terminal 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 with a data format of 9600 Baud, 1 start bit, 8 data bits, and no parity bits.
The serial port is 1000 Volt DC isolated (non-SELV) and ESD protected to 15kV air discharge. The
connector is a 6 Pin MTA plug with connections shown below.
Table 22 MTA Plug Pinout
Pin
1
2
3
4
5
6
A DB9 male connector is added and connected parallel to the 6 position header. It is configured as
DTE.
Table 23 DB9 Pinout
Pin
1
2
3
4
5
6
7
8
9
Signal Name
ISO_GND Isolated service terminal ground
ISO_TXD Isolated service terminal transmit output
ISO_RXD Isolated service terminal receive input
NC No Connection
NC No Connection
NC No Connection
Signal Name
NC No Connection
ISO_RXD Isolated service terminal transmit output
ISO_TXD Isolated service terminal receive input
NC No Connection
ISO_GND Isolated service terminal ground
NC No Connection
NC No Connection
NC No Connection
NC No Connection
Function / Comments
Function / Comments
114
Specifications