SAFETY SYSTEMS VOLTECH AT3600 USER MANUAL
PAGE 10.6. VPN 98 - 024 SAFETY SYSTEMS
Principle of Operation
The cable carries 3 pairs of color-coded wires. Each pair must be linked together by the
safety system before the AT3600 will operate a high voltage test. If any one of the three
pairs is becomes un-linked during a test, the AT3600 very quickly switches off any
high voltage that is being produced.
There are three pairs of wires in order to provide the multiple redundancy required by
various international safety standards.
Cable Schematic.
Function AT3600
9-pin d-type
Safety Light
Curtain
Connection to safety
system.
3 Yellow Primary power to
the high voltage
generators is passed
through pins 3 and 7
7 Blue
No
Connection
Black
No
Connection
Black
Main power-breaking
relays (Final Switching
Device) of the safety
system. The black link
is used to series 2
relays, if present.
5 Green Secondary control
logic.
6 Black
Monitoring or auxiliary
relay.
2 Red Secondary
switching device. (A
6k8 resistor is fitted
in series with pin 2).
9 White
Secondary Control
Element.
Screen Screen No
Connection
For full details of the Voltech Safety Interlock cable, request a copy of the Safety
Interlock Cable Installation Guide, Voltech part number 98-078.
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