INTERFACE DETAILS VOLTECH AT3600 USER MANUAL
CONNECTOR DETAILS
9-pin female D-type connector.*
Pin Signal name Pin Signal name
1 No connection 6 0V
2 +18V 7 i/p HVIP
3 o/p HVOP 8 o/p LID1
4 o/p LID0 9 i/p LB1
5 i/p !LB0
There are 3 active circuits on the safety interlock connector. Two are digital
control circuits, and the third is a high voltage analog circuit.
ALL three circuits must be correctly made before the AT Series Tester will
generate accessible dangerous voltages.
If any of the circuits are ‘broken’ during use, dangerous voltages, which could be
applied to the transformer under test, are actively reduced and quickly made safe.
*NOTE: A slim connector shell is required to fit the AT3600 aperture. Example
type: McMurdo 51218-1
HVOP and HVIP (Pins 3 and 7)
DANGEROUS VOLTAGE
The HVOP is an analog voltage output which can be as high as 400V.
The HVIP is a corresponding input voltage. All the high voltage test signals
used by the AT Series Testers are derived from this input.
In the ‘safe’ condition, HVOP is linked back into HVIP.
LB0 and LB1 (Pins 5 and 9)
These are the two digital control signals.
In the ‘safe’ condition, !LB0 is linked to 0v, and LB1 is driven to a voltage
between +4.5V and +5V.
LID0 and LID1 (Pins 4 and 8)
These are two further digital control outputs used by the Voltech Safety
System.
PAGE 8.2.6. VPN 98 - 024 INTERFACE DETAILS
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