Emerson ROC827 instruction manual Wiring Communications Modules, Local Operator Interface LOI

ROC827 Instruction Manual

6.Replace the wire channel cover.

5.4Wiring Communications Modules

Signal wiring connections to the communications are made through the communications port removable terminal bock connectors and through RJ- 11 and RJ-45 connectors. All modules have removable terminal blocks for convenient wiring and servicing. The terminal blocks can accommodate a wide range of wire gauges (12 AWG or smaller).

Caution	Failure to exercise proper electrostatic discharge precautions, such as
	wearing a grounded wrist strap may reset the processor or damage
	electronic components, resulting in interrupted operations.

To connect the wire to the removable block compression terminals:

1.Bare the end (¼ inch maximum) of the wire.

2.Insert the bared end into the clamp beneath the termination screw.

3.Tighten the screw.

The ROC827 should have a minimum of bare wire exposed to prevent short circuits. Allow some slack when making connections to prevent strain.

Note: All modules have removable terminal blocks for convenient wiring and servicing. Twisted-pair cable is recommended for I/O signal wiring. The removable terminal blocks accept 12 AWG or smaller wire.

5.5 Local Operator Interface (LOI)

The Local Operator Interface (LOI) local port provides direct communications between the ROC827 and the serial port of an operator interface device, such as an IBM compatible computer. The interface allows you to access the ROC827 with a direct connection using ROCLINK 800 software to configure and transfer stored data.

The LOI uses the Local Port in ROCLINK 800 software.

The LOI terminal (RJ-45) on the CPU provides wiring access to a built-in EIA-232 (RS-232) serial interface, which is capable of 57.6K baud operation. The RJ-45 connector pin uses the data terminal equipment (DTE) in the IEEE standard.

The LOI port supports ROC Plus and Modbus protocol communications. The LOI also supports the log-on security feature of the ROC827 if you have enabled the Security on LOI in the ROCLINK 800 software.

Table 5-3 shows the signal routing of the CPU connections. Figure 5-3 shows the RJ-45 pin out.

Issued Mar-06 Communications 5-5