1139300
Shadow 8 User Manual
2-42
Installation and Checkout
In order for the EDM function to monitor the performance of your relays, you must connect
the Shadow 8 stop circuits to the interfacing relays (see figures 3 and 4 at the back of the
manual) instead of connecting them in series with the machine’s immediate stop circuit or
with control reliable safety relay modules.
When EDM inputs are wired and enabled, Shadow 8 regularly performs the following checks:
•
Whenever Shadow 8 powers up, it looks for an EDM “closed” condition and, if this is
found, enters a state consistent with the selected operating mode.
•
Whenever Shadow 8 activates its safety outputs, it monitors the EDM for a “closed”-to-
“open” transition. This transition must occur within 300 mS or Shadow 8 considers the
EDM faulted and enters an Alarm state.
•
Whenever Shadow 8 enters a Curtains Obstructed state, it checks whether the EDM input
closes within 300 mS of the switching of the safety output. If it does not, Shadow 8 enters
an Alarm state.
•
If the EDM connections are incorrectly wired, Shadow 8 enters an Alarm state.
Wiring Shadow 8 Optional Control Box to a PLC
When wiring the optional Shadow 8 control to a Programmable Logic Controller (PLC) or
other type of microprocessor-based control, two (or more) independent logic systems should
be used to control the press’s stop circuit. Wintriss does not provide specific step-by-step
instructions for connecting Shadow 8s to PLCs. This is because of the variety of PLCs and
the various programming techniques used. Only general guidelines are supplied in this
section. Refer to figures 3 and 4 at the end of the manual for suggested wiring.
INSTALL SUPPRESSORS IN EDM CIRCUITS
Make sure to install suppressors, as shown in figures 3 and 4 at the end of the manual, when you
wire your EDM circuits. Unsuppressed EDM circuits may generate electrical noise, which may
cause electronic components not to function properly. Two suppressors are provided in the
Shadow 8 Test Kit.
AVOID INCORRECT WIRING TO A PLC
• Ensure that the light curtain control is properly wired to your PLC.
• Follow the guidelines in ANSI standard B11.1. The guidelines below serve as a reminder of the
importance of connecting your light curtain correctly when using a PLC. Do not wire the outputs
in series when connecting Shadow 8 to a PLC.
• Be aware that the details of wiring and programming the PLC are solely your responsibility, and
not Wintriss’s.
• Use a single safety PLC or multiple non-safety PLCs.
Failure to comply with these instructions will result in death or serious injury.
NOTICE
DANGER
!
Содержание Shadow 8
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