Emerson operation manual Wiring Outputs to Points, Output LED, Output Setup in E2, Old 8ROs

Figure 9-9- Relay Output Test Mode for MF I/O Board

9.2.5Wiring Outputs to Points

Old 8ROs

The old design of 8RO (P/N 810-3002) used points with two terminals on them. To connect output devices to these points, wire the point terminals in series with the load, so that the path is closed when the 8RO relay is CLOSED and open when the 8RO relay is OPEN.

New 8ROs and 8RO-FCs

All other E2-compatible output boards, including the new design of 8RO (P/N 810-3005), the 8RO-FC, and have Form C contacts. Figure 9-8shows how to wire the three-terminal Form C contact.

One wire of the two-wire 8RO-FC connection should always be connected to the middle terminal. The second wire must either be connected to the N.C. terminal (if you want the path to be closed when the relay is de-energized) or the N.O. terminal (if you want the path to be open during power failure.

9.2.6The Output LED

Each output point on an output board has an indicator LED that shows the status of the output. This LED is lit to show the output is ON, and unlit to show the output is OFF.

The definition of ON and OFF in this case is deter- mined by the position of the fail-safe dip switch (see Table 9-3). Therefore, if the output’s switch is UP, an illuminated LED means the path is CLOSED, but if the switch is DOWN, an illuminated LED means the path is OPEN.

9.2.7Output Setup in E2

In order for the E2 to properly control devices that are hooked to an I/O board, you must first tell the E2 what type of output the devices require. This is achieved from the Output Definitions/Status screen.

9.2.7.1Configuring a Point from the Output Definitions/Status Screen

To configure a point, go to the Output Definitions/Sta- tus screen by pressing Alt + O or:

1.Press to open the Main Menu

2.Press (System Configuration)

3.Press (Output Definitions)

The Output Status screen opens:

Figure 9-10- Output Status Screen

To configure a point, use the up and down arrow keys to move the cursor to the point you wish to set up, and press  (SETUP).

If you press  to set up a 4AO output point, the E2 will automatically transfer you to the Analog Output screen Figure 9-6. For all other output board types, press- ing  will bring up a pop-up menu such as the one shown in Figure 9-11. This menu will prompt you to spec- ify the output as either Digital, Pulse, or One Shot. Press

if the output is Digital, press if the output is Pulse,

press if the output is One Shot, or press  to cancel setup.

9-12 • E2 RX/BX/CX I&O Manual 026-1614 Rev 4 5-JAN-2013