Triggering - MICRO-EPSILON interferoMETER Operating Instructions Manual

Installation
5.4.10

Triggering

The pluggable 11-pin screw terminal with Digital I/O has two trigger inputs.
Sync/Trig input
The Sync/Trig port can be used as symmetrical
trigger input.
Configure the Sync/Trig ports of the controllers
as trigger inputs.
The trigger source must provide a symmetrical
output signal according to the RS422 standard.
For asymmetrical trigger sources, we recom-
mend inserting the SU4 level converter (3 chan-
nels TTL/HTL to RS422) between trigger source
and controller.
Encoders are not suitable for trigger purposes.
IMS5x00
TrigIn input
The TrigIn switching input is equipped with an internal
pull-up resistor of 15 kOhm. An open input is identified
as High.
Trigger sources can be switching contacts, transistors
(NPN, N-channel FET) and SPS outputs.
Electrical properties
- Programmable logic (TTL/HTL),
- TTL: Low level ≤ 0.8 V; High level ≥ 2 V
- HTL: Low level ≤ 3 V; High level ≥ 8 V (max. 30 V),
- Minimum pulse width 50 µs
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