Rockwell Automation 1771-QB Linear Pos. - Manual (Page 60)

Installing the Linear Positioning Module
Chapter 5
5Ć21
Power Supply
To connect the discrete output power supply, follow these steps:
1. Connect the (+) side of the discrete output power supply to the O/P
SUPPLY terminal (40) on the module.
2. Connect the common of the discrete output power supply to ground at the
I/O chassis and to the returns (-) of all output devices.
3. Connect the discrete output power supply chassis to ground.
4. Connect the shield to ground at the I/O chassis end.
OUTPUT 1
If configured as an in-position output, this output goes low in auto mode when
the axis begins to move towards a commanded setpoint or after a jog. It goes
high when the axis enters the in-position band surrounding an endpoint.
You can use this output to drive another control loop to coordinate the axis
movement of various control loops. In this case, you connect the OUTPUT 1
terminal to the discrete hardware start input of another control loop. Otherwise,
you may connect this output to a light emitting diode or other indicator.
Important: When you are connecting the module’s discrete inputs and outputs
to external devices, keep in mind that the discrete inputs sink current and the
discrete outputs source current.
OUTPUT 2
If configured as a loop fault output, this output is normally high. It goes low
when the module detects a fault in the control loop. You can use the loop fault
output to drive another module’s hardware stop input. You can connect the loop
fault output terminal to the hardware stop input of another control loop or to a
visual/audible fault indicator.
Both OUTPUT 1 and OUTPUT 2 can be configured to be programmable
outputs. (See Chapter 9.)