Rockwell Automation 1771-QB Linear Pos. - Manual (Page 53)

Installing the Linear Positioning Module
Chapter 5
5Ć14
Power Supply
To connect the discrete input power supply, follow these steps:
1. Connect the (+) side of the discrete input power supply to the I/P SUPPLY
terminal (27) of the module.
2. Connect the common of the discrete input power supply to the I/P
COMMON terminal (28) of the module.
3. Connect the cable shield to ground at the I/O chassis end.
4. Connect the power supply chassis to ground.
Auto/Manual Input
The auto/manual input, in conjunction with the auto/manual bit in the command
block, determines the module’s mode of operation. Both the auto/manual input
and the auto/manual bit must be on to achieve auto mode. Otherwise, the mode
is manual. Connect the auto/manual and common terminals to an external
source.
Hardware Start Input
The hardware start input performs the same function as the software start. (See
Chapter 8.) When you command a setpoint, no axis movement occurs on that
control loop until the module receives a start command or a transition from low
to high (after at least 20 msec of low) at the control loop START terminal
(15/16).
Example: To start movement to a setpoint when Output 1 (configured as the
in-position output) of another control loop goes high, connect the hardware start
input to the Output 1 of that control loop.
You don’t need to connect the hardware start terminals if you won’t be using
this feature.
Hardware Stop Input
A low input at the STOP terminal (17/18) will stop axis movement for the
corresponding control loop. This allows you to connect any number of normally
closed emergency stop switches in series between a high source and the
hardware stop terminal. Opening any of these switches will immediately zero
the analog output for that loop.