6.3 Initial Electrical Connections
WARNING:
•
Risk of electric shock
•
Use extreme caution to avoid electrical shock. Serious injury or death could result.
•
Always disconnect power from the safety system (for example, device, module, interfacing, etc.),
guarded machine, and/or the machine being controlled before making any connections or
replacing any component. Lockout/tagout procedures might be required. Refer to OSHA
29CFR1910.147, ANSI Z244-1, or the applicable standard for controlling hazardous energy.
•
Make no more connections to the device or system than are described in this manual. Electrical
installation and wiring must be made by a Qualified Person
4
and must comply with the applicable
electrical standards and wiring codes, such as the NEC (National Electrical Code), NFPA 79, or
IEC 60204-1, and all applicable local standards and codes.
Lockout/tagout procedures may be required (refer to OSHA1910.147, ANSI Z244-1, ISO 14118, or the appropriate standard
for controlling hazardous energy).
Make the electrical connections in the order described in this section. Do not remove end-caps; no internal connections are
to be made. All connections are made through the DES4E-51D connection.
Emitter Cordset
S4B emitters require a mating 5-pin cordset, but not all conductors are used. The other wires are in place to allow a
parallel connection (color-for-color) to the receiver cable, providing sensor interchangeability (or “swapability”); either
sensor may be installed at either cordset connection. In addition to providing similar cabling, this wiring scheme is
advantageous during installation, wiring, and troubleshooting.
Receiver Cordset
Do not connect any wires to the machine control circuits (OSSD outputs) at this time.
6.4 Initial Checkout Procedure
The initial checkout procedure must be performed by a Qualified Person. It must be performed only after configuring the
System and after connecting the components.
Perform this procedure to:
•
Ensure proper installation when the System is first installed
•
Ensure proper System function whenever any maintenance or modification is performed on the System or on the
machinery that is guarded by the System.
6.4.1 Configuring the System for Initial Checkout
For the initial checkout, the S4B System must be checked without power available to the guarded machine. Final interface
connections to the guarded machine cannot take place until the light screen system has been checked out. This may require
lockout/tagout procedures (refer to OSHA1910.147, ANSI Z244-1, ISO 14118, or the appropriate standard for controlling
hazardous energy). The OSSD connections will be made after the initial checkout procedure has been successfully
completed.
Verify that:
•
Power has been removed from (or is not available to) the guarded machine and its controls or actuators
•
The machine control circuit or the Safety/Interface Module is not connected to the OSSD outputs at this time
(permanent connections will be made later)
6.4.2 Apply Initial Power to the S4B System
1. Inspect the area near the light screen for reflective surfaces, including work pieces and the guarded machine.
Reflective surfaces may cause light beams to reflect around a person in the light screen, preventing the person from
being detected and not stopping the machine motion (see
on page 20).
2. Eliminate the reflective surfaces as much possible by relocating, painting, masking, or roughening them. Remaining
problem reflections will become apparent during the trip test.
4
A person who, by possession of a recognized degree or certificate of professional training, or who, by extensive knowledge, training and
experience, has successfully demonstrated the ability to solve problems relating to the subject matter and work.
S4B Safety Light Curtain
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