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Document #7650-0038 Rev A1. © Copyright 2019 Directed Energy, Inc. All rights reserved.
The inputs on the Remote Interface connector are internally pulled high. For remote
operation, pull the Remote pin low. This disables the front panel Enable button and
prevents local operation.
NOTE: The Enable, Interlock, Invert, and Auto Reset inputs are always active, regardless
of the state of the Remote input.
If the Enable input is momentarily pulled low, the instrument will be enabled, or a fault will
be cleared, on the rising edge.
If the Invert input is pulled low, gate pulses are inverted internally. The output pulse will
be inverted from that of the Gate input.
WARNING: If the system is wired for remote control, the local mode can be
overridden by the remote user and the system can be enabled remotely.
This can
create a dangerous scenario: One person may be working on the load, needing to turn
the instrument on and off locally, while another person working remotely could
inadvertently turn it ON. For this reason, it is recommended to completely turn the high
voltage power supplies and the instrument OFF when servicing the load.
The Interlock input (pin 12) must be connected to Ground (pin 4) in order to satisfy
the interlock circuit as shipped from the factory.
If the Interlock pin is disconnected,
the user will not be able to enable the output. The interlock feature can used as part of a
safety circuit in which the Interlock input is pulled low to enable the instrument and
unconnected to disable it.
The Auto Reset input allows the user to choose how to clear the faults. When the Auto
Reset input is low, the instrument resets itself 6 ms after a fault occurs. When the Auto
Reset input is unconnected, the user must reset faults manually.
A fault can be cleared manually by either of two methods:
1) On the front panel, press the Enable button once to reset the fault, then a second time
to enable the output.
2) On the Remote Interface connector, pull the Enable input low once to reset the fault,
then a second time to enable the output.
The status outputs (pins 6, 8, 14, and 15) follow the states of the front panel LEDs. All are
open drain and require external pull up resistors (1 kΩ or larger) to a power supply of up
to +24 V DC.
