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CTI 2572 Installation and Operation Guide
27
Connecting to the Serial Ports
Port 1 provides a subset of the RS-232C electrical interface. Cables for the RS-232 ports should be
no longer than 50 feet. Port 2 provides an RS-422 electrical interface. RS-422 cables may be up to
4000 feet in length.
The serial port connectors on the 2572 have been designed to accept commonly used serial cables.
The pin-outs on the RS-232 port and the RS-422 port match those found on the SIMATIC TI 545
PLC. Should you choose to construct your own custom cables, please refer to Appendix A for
connector pin-out descriptions.
2.9. Module Checkout
Power On
When power is applied to the 2572, the ACTIVE LED should light after about one or two seconds.
If the ACTIVE LED fails to light and you are certain that power is applied, then the module
hardware is defective. If the ACTIVE LED periodically cycles off and on every two seconds, it
indicates that the module diagnostics have detected a hardware problem. Refer to Chapter 5
Troubleshooting before proceeding.
If the LED blinks rapidly (about once per second), it indicates that the network parameters (including
IP address) for the module are not set. Refer to Section 2.6 on page 19 and Section 2.7 on page 120
for information on setting the parameters.
NOTE:
If you chose to obtain the IP address information from the PLC, the PLC switch must be set to the
RUN position before the program can transfer the information to the 2572.
Ethernet (10BaseT Connector)
When you attach to the network using the 10BaseT connector the following should occur:
1) The AUI LED should extinguish and the LB (Link Beat) LED should illuminate. This
indicates that a valid link beat is being obtained from the hub and that the 10BaseT port has
been selected by the 2572.
2) If you are attached to an active network, you should see the Ethernet RCV (receive) LED
flicker, indicating network signals are being received.
If the above conditions are not met, refer to Chapter 5.