Wiring Details
Communications Wiring
Network Controller 6 Mounting and Wiring Guide
Part Number 11843 Rev 2.1
Updated: January 16, 2012
15
Serial
There are two serial ports on the T-600 base unit. Each has a UART capable of operation up to 115,200 baud.
At the bottom of the board (see
port using a DB-9 plug (male) connector.
To the right of this is a two-wire with shield
port, using a screw-terminal connector plug.
Note
A green “receive” LED and yellow “transmit” LED are provided for each serial port. These LEDs are
located on the bottom board, on the
opposite side
of the serial connectors (see
These LEDs are labeled on the board (COM1, COM2) and are not visible with the cover on.
RS-232—
An RS-232 serial port using a male DB-9 connector always operates as COM1. You can use standard
DB-9 serial cables with this port. The T-600 is a serial DTE device, such another DTE device (PC, for example)
requires a “null modem” cable. If connecting the T-600 to a DCE device (modem, for example), a
straight-through cable is used.
provides standard serial DB-9 pinouts.
Note
If a modem option card (NPB-MDM) is installed, this port becomes disabled—except if rebooted with
the mode jumper (see
on page 7) in the “Serial Shell” position.
RS-485—
An RS-485 port uses a 3-position, screw terminal connector and always operates as COM2. Wire to
this connector with shielded 18-22AWG wiring (refer to the TIA/EIA-485 standard). As shown in
screw terminals (from left-to-right) are shield, plus (+), and minus (–).
Note
As shipped from the factory, the RS-485 port on the controller is “unbiased”. If necessary, you can
change this to add RS-485 biasing. However, this requires some disassembly and reassembly of the
controller. See the next section
.
USB —
A single USB port is on the top board.
Note
The USB port is for future use.
Table 3
Serial port (RS-232 and RS-485) pinouts.
Base RS-232 DB-9 Port (COM1)
Base RS-485 Port (COM2)
Pinout References
Signal
DB-9 Plug Pin
Pinouts
DCD
Data carrier detect
1
RXD
Receive data
2
TXD
Transmit data
3
DTR
Data terminal ready
4
GND
Ground
5
DSR
Data set ready
6
RTS
Request to send
7
CTS
Clear to send
8
not used on the T-600
9
DB-9 Plug
(male)
1
5
6
9
3-position connector
(male)
S + –