Figure 2-12B. Serial Com Port Interface Diagram-Rs-485; Figure 2-13. Service Tool Cable/Interface Diagram - Woodward ProTech-SX 8237-1242 Product Manual

ProTech-SX
Optional termination resistors for RS-485 communication networks are included
within the ProTech-SX control's internal circuitry, and only require terminal block
wire jumper(s) for connection to a network, for applications requiring these
termination resistors. Refer to Figure 2-12b for jumper connections.
ISOLATED
RS485 / RS232
PORT
+5V
ProTech-SX
Module
S_GND
Figure 2-12b. Serial Com Port Interface Diagram—RS-485
Service Port Communications
One 9-pin Sub-D based service port is available to interface with a computer for
loading program settings into the ProTech-SX and for reading stored log files
from the ProTech-SX, using the Programming and Configuration Tool (PCT).
This port is designed to communicate to the computer using a serial DB9
extension (straight-through) type of computer cable.
ProTech-SX
Module
TXD
ISOLATED
RXD
RS232
SERVICE
COM
PORT
D_GND

Figure 2-13. Service Tool Cable/Interface Diagram

28
20
19 OPTIONAL
TERMINATION
18
JUMPER - LO
LO
17
HI
16
15
OPTIONAL
TERMINATION
14
JUMPER - HI
13
CONNECTOR SHIELD
PIN 2
PIN 3
PIN 5
TYPICAL STRAIGHT-THROUGH CABLE
The RS-232 serial cable must be disconnected when not in use. The
port is a service port only, it is not designed for permanent
connection.
Manual 26546V1
COM
HI LO
MODBUS
SLAVE
DEVICE
COMPUTER
PIN 2
RXD
PIN 3
TXD
PIN 5
COM
Woodward
COM
HI LO
MODBUS
MASTER
DEVICE