INSTALLATION 3

3.3.4 Input

An opto-coupled and polarity insensitive input is available on the 25-pin connector. The
pinout is the following:
Pin Name Function
18 EXT_TRIG A External trigger (polarity insensitive)
19 EXT_TRIG B External trigger (polarity insensitive)
When current flows through the EXT_TRIG input, the yellow LED (Figure A, 6) is on.
The External Trigger can be used in One Shot Mode or in Phase Mode. Its main functions
are:
acquisition trigger in One Shot Mode
reading phase-ON/reading phase-OFF command in Phase Mode
match code storage command when the Match Code option is enabled
This input can be driven by either a PNP or NPN type command. The connections are
indicated in the following diagrams:
NOTE
Polarity insensitive input assures full functionality even if pins A and B are
exchanged.
USER INTERFACE
OUT
MATRIX
VCC
A
Vext
BGND
V+
~
~
+ - I in
30 Vdc Max.
Figure 26 - Input PNP Command Using External Power
USER INTERFACE
MATRIX
VCC
A
B
V+
~
~
+-
9
25
OUT
GND
GND
V
S
Figure 27 - Input PNP Command Using Matrix-1000 Power
27