Rockwell Automation 57C570 AutoMax PC3000 User Manual - Manual (Page 134)

11Ć6
AutoMax PC3000 Ć RSĆ422
1
3
2
9
5
TXD (-)
TXD (+)
RXD (+)
RXD (-)
Sig Com
User Equipment
Figure 11.6 Ć RSĆ422 Cable
When you are using the RSĆ422 protocol, do not use hardware
handshaking because the CTS, DTR, and DSR signals are not
available.
11.2 Connecting Devices to Port B
You can connect modems or other DCE devices to Port B of the
AutoMax PC3000 Serial card when the port is not configured as a
programmingĆdevice connection. Port B is an opticallyĆisolated port
with a 25Ćpin female DĆshell connector.
When connecting a DCE device to Port B, make sure that you:
D make port B available to accept a DCE device
D use the correct cable to connect the device to Port B
11.2.1 Making Port B Available
When you use Port B for communication to other RSĆ232 devices,
you must set up an alternate programmingĆdevice connection. See
chapter 10 for an explanation of these other methods. To enable Port
B to accept devices other than a programming terminal:
Step 1.
Remove power to the AutoMax PC3000.
Step 2. Remove the jumper JP2 on the PC3000 Processor card.
See figure 11.7.
Step 3. Apply power.