Advantech B+B SmartWorx 232PTC9 Quick Start Manual

Product Overview

Power
2.5 mm
phono
jack
1

Power the Unit

Power the unit with 12 VDC.
(Use B+B SM16-12-V-P230-C1)
2

Connect Serial Cables

3

Operation

Data flow from master port to slave ports
All data that is sent to the TX line, pin 3 on the master port,
is broadcast to both slave ports under all conditions. This
data appears on pin 2 of each slave port.
Data flow from slave ports to master port.
Data that is sent to the TX line (pin 3) on the slave ports
must compete for the path to the master port. There are
two
methods of capturing the path to the master port, RTS and
automatic data sensing. The first slave port to either raise
its RTS line or transmit data captures the path to the master
port. The path will be locked on that slave port until it either
Slave Port 1
lowers its RTS line, or 60 milliseconds after the end of its
DB9 female
transmission. Note that the 232PTC does not buffer any data,
any data sent to the opposite slave port during this period will
be lost.

Handshake signals

The CTS signal on each slave port indicates to the slave
devices if the path to the master port is available. If the slave
port's CTS line is high, data received by that port will be
Master
transmitted out the master port. If CTS is low, the opposite
Port
slave port has captured the path to the master and any data
DB9
at the inactive slave port will be lost. For example, if both
slave ports are inactive and have RTS low, CTS will be high
female
at both slave ports, indicating that the path is available. As
soon as one slave port captures the path by either beginning
its transmission or raising its RTS line, the CTS signal at
the opposite slave port will drop to the low state. The RTS
output on the pin 7 of the master port follows the RTS signal
level found on the active slave port.
Slave Port 2
DB9 female
Pinouts
All ports on the 232PTC are configured as RS-232 DCE
ports, using DB9 female connectors. Note that a null-modem
type connection will be required to connect the 232PTC9 to
other DCE configured ports. Tables 1 and 2 and Figure 2
show the configuration of each port.
PORT 1
TD
3
RD
2
RTS
7
8 CTS
5
232PTC9 Port Diagram
RD TD RTS
5
2 3 7
MASTER
PORT
PORT 2
CONTROL
CIRCUITRY
GROUND

Master Port Pinouts

SIGNAL PIN
TD 3
RD 2
RTS 7
GND 5

Slave Port Pinouts

SIGNAL PIN
TD 3
RD 2
RTS 7
CTS 8
GND 5
+
Cascading Port Combiners
Port combiners can be cascaded by
connecting the master port of each successive
unit to one of the slave ports of the preceding
unit. Each additional port combiner adds one
slave port to the system.
TD
3
RD
2
RTS
7
CTS 8
5-
DIRECTION
Input
Output
Output
*****
DIRECTION
Input
Output
Input
Output
*****