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Supported data formats for the COM port are:
8N1 - 8 char bits, no parity, 1 stop bit (Default)
8N2 - 8 char bits, no parity, 2 stop bits
8O1 - 8 char bits, odd parity, 1 stop
8O2 - 8 char bits, odd parity, 2 stop bits
8E1 - 8 char bits, even parity, 1 stop bit
8E2 - 8 char bits, even parity, 2 stop bits
The tables on the following page provide pin descriptions for the COM data port in RS-232 mode and
RS-485 modes, respectively.
Pin
Input / Output
Number
1
OUT
2
OUT
3
Reserved
4
Ground
5
OUT
6
IN
7
OUT
8
IN
16
com1.databits
(As viewed from the outside the unit)
Table 2-2. COM Port Pin Details (RS-232)
Pin Description
ALARM Output
DCD (Data Carrier Detect)
--
Connects to ground (negative supply potential) on chassis
RXD (Received Data)—Supplies received data to the connected device
TXD (Transmitted Data)—Accepts TX data from the connected device
CTS (Clear to Send)
RTS (Request to Send)
MDS TransNEXT Technical Manual
com1.paritybits
"N"
8
"N"
8
"O"
8
"O"
8
"E"
8
"E"
8
MDS 05-7280A01, Rev. A
com1.stopbits
1
2
1
2
1
2
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