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HA0368T Rev C May 2019
Chapter 3
10)Windows
TM
should detect the new hardware. Wait while Windows
TM
installs the
drivers for the new hardware.
3.4.1 Using an External Trigger
To use the external trigger, the unit must be set to
Triggered
mode - see Section 4.4.2.
The K-Cube solenoid controllers have two bidirectional trigger ports (TRIG1 and
TRIG2) that can be used to read an external logic signal or output a logic level to
control external equipment. By default, TRIG 1 is configured as an input and TRIG 2
as an output. The active logic state can be selected High or Low to suit the
requirements of the application. In this way, the shutter can be opened and closed in
relation to the duty cycle of the trigger input signal.
Electrically the ports output 5 Volt logic signals and are designed to be driven from a
5 Volt logic. The unit must be primed (i.e. the top panel wheel has been moved up)
before the unit can respond to the external trigger.
Note
If any problems are encountered during the connection and power up
process, power cycle the unit, which should clear the error.
Warning
In external triggering mode, the shutter is opened and closed under
control of an external logic signal, connected to the SMA input marked
“TRIG IN” on the rear panel.
The ‘TRIG IN’ SMA defaults to logic LOW, when the external input is open
circuit (disconnected). However, the way in which the unit responds when
the ‘TRIG IN’ connector is open circuit differs depending on whether the
trigger is set to Active High or Active Low. This is particularly important
in applications where a shutter is used to enable or disable a laser light
source.
When set to Active Low, the shutter will open immediately if the top panel
wheel is moved up.
When set to Active High, the trigger is disabled when the external input is
open circuit (disconnected).
The top panel wheel must be moved up for the shutter opening to be
enabled, so a disconnected input in itself cannot cause the shutter to
open. However, understanding this feature of the KSC101 is particularly
important for customers using the KSC101 cube in an application where
the shutter opening due to a disconnected EXT TRIG input can have
safety implications.
