Emerson E2 - Manual (Page 105)

The 8RO, 8ROe, 8IO, and MultiFlex Outputs Input and Output Setup • 9 - 11
The fail-safe dip switches are labeled S2 on the 8RO, and
switch S3 on the 8ROe and 8IO. Each of the eight rockers
on the fail-safe dip switch corresponds to an output on the
board. Set the rocker UP to close the relay and turn the
output ON during network failure. Set the switch DOWN
to open the relay and turn the output OFF during network
failure.
9.2.4 Wiring 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 9-8 shows 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 dur-
ing power failure.
9.2.5 The 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.
9.2.6 Output 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.
9.2.6.1 Configuring a Point from the Out-
put Definitions/Status Screen
To configure a point, go to the Output Definitions/Sta-
tus screen:
1. Press

to open the Main Menu
2. Press

(System Configuration)
3. Press

(Output Definitions)
The Output Status screen opens:
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 9-10. 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.
Depending upon what type of output you selected, the
Digital Output, (see Section 9.2.6.3, Setting Up Digital
Outputs) Pulse Digital Output, or One Shot Digital Output
screen will appear.
9.2.6.2 Using the Output Definitions/Sta-
tus Screen
The Output Definitions/Status screen serves a dual
Figure 9-9 - Output Status Screen
Figure 9-10 - Output Data Type Pop-Up Menu