Inspect Your Installation; Disconnect Motion-Causing Device - Allen-Bradley SLC 500 User Manual

8-2 Starting Up Your Control System

1. Inspect Your Installation

2. Disconnect
Motion-Causing Device
Publication 1747-UM011C-EN-P - December 2001
For general recommendation concerning installation safety
requirements and safety requirements and safety related work
practices, refer to the requirements specific to your region.
• Europe: Reference the standards found in EN 60204 and your
national regulations.
• United States: refer to NFPA 70E, Electrical Safety Requirements
for Employee Workplaces.
You can often prevent serious problems in later test procedures by
first making a thorough physical inspection. We recommend that you
do the following:
1. Make sure that the controller and all other devices in the system
are securely mounted.
2. Check all wiring including:
• connections from the main disconnect to the controller input
• the master control relay/emergency-stop circuit
• input device circuits
• output device circuits
Make certain that all wiring connections are correct and that there are
no missing wires. Check the tightness of all terminals to make certain
wires are secure.
3. Measure the incoming line voltage. Be certain that it
corresponds to controller requirements and that it falls within
the specified voltage range. See specifications for input voltage
ranges on page 2-14.
In the following test procedures, the controller is energized. As a
safety precaution, you must make certain that machine motion does
not occur. The preferred way is to disconnect the motor wires at the
motor starter or the motor itself. In this way, you can test the
operation of the starter coil, verifying that your output circuit is wired
correctly and functioning. Similarly, the preferred way to disconnect a
solenoid is to disengage the valve, leaving the coil connected.
In some instances, you may not be able to disconnect a device the
preferred way. In this case, it is necessary to open the output circuit at
some convenient point.