Trig Input And Pwok Output; Conventions On Logical Inputs/Outputs - Newport LDS1000 User Manual

LDS1000
9.0

TRIG Input and PWOK Output

EDH0170FE1010 – 09/98
9.1

Conventions on Logical Inputs/Outputs

The controller has a logical TRIG input available on a BNC socket on the
rear panel.
It provides a logical PWOK output that indicates if the sensor is receiving
light.
• The convention retained for logical inputs/outputs is the following:
– ACTIVE = 1 = High Status = The current flows = Drawn at the ground.
– PASSIVE = 0 = Low Status = The current doesn't flow = Open wire.
• The output (PWOK) is in High status (value 1) when the sensor receives
light. With the RO command it is possible to read the status of this out-
put.
• The passage of the TRIG input from Low status to High status (upward
front) triggers the start of the synchronized acquisitions. With the RB
command it is possible to read the status of this input.
• The wiring of the logical PWOK output to the logical TRIG input allows
an acquisition cycle to be started when signal inputs into the measu-
rement range of the sensor.
• Max. frequency PWOK: 130 Hz.
• Max. frequency TRIG: 500 Hz.
• The reading is performed with a random delay from 0 to 1 msec.
The logical inputs/outputs can only be used in Interface Mode.
Controller for Laser Diode Sensors
TRIG PWOK
Input Output
Logical Inputs/Outputs.
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