Chapter 1. Installation
9
Trigger Connections
+5V - Pin 32
Chassis
GND
SHLD - Pin 58
74HCxx
TRG-D - Pin 47
74HCxx
TRG-C - Pin 45
GND
GND - Pin
52
TRG-x connected to GND (normally-open switches).
The active level (default is active low) can be changed with the INLVL
command. These inputs are like the general-purpose inputs. The
differences are (1) the triggers are pulled up via the AUX-P pull-up
terminal; and (2) the triggers can be programmed with the INFNCi-H
command to function as position capture inputs (encoder & motor
position is latched within 50µs) and registration inputs.
+5V connected to AUX-P (sourcing current).
Pr5V power to the TRG input pull-up
resistors. As an alternative, you can connect
AUX-P to an external power supply of up to
24VDC.
NOTE: AUX-P is also the pull-up for POS, NEG, &
HOM inputs.
SINKING CURRENT: To make these inputs sink
current, connect AUX-P to GND.
Internal Schematic
HCMOS compatible:
Low
≤
1.00V; High
≥
3.25V
74HCxx
6
.
8 K
Ω
Resistors
47 K
Ω
Resistors
TRG-B - Pin 43
AUX-P - Pin
34
74HCxx
TRG-A - Pin 41
+5VDC
Connection to a Sinking Output Device
Connection to a Sourcing Output Device
Electronic
Device
Out 5-24 Volts
GND
74HCxx
6.8 K
Ω
47 K
Ω
Trigger Input
Connection
Ground
Connection
Output
Ground
+5VDC
AUX-P
+5V
GND
Pulled up
to +5V
(sourcing)
The output should
be able to sink at
least 1mA of current.
OEM-AT6400
GND
Electronic
Device
Out 5-24 Volts
GND
74HCxx
6.8 K
Ω
47 K
Ω
Trigger Input
Connection
Ground
Connection
Output
Ground
+5VDC
AUX-P
+5V
GND
Pulled
down to
ground
(sinking)
OEM-AT6400
GND
V1
R1
Connection to a Combination of Sinking & Sourcing Outputs
Typical value for R = 450
Ω
(assuming R1 = 0)
Note: The value of R may vary depending on the value of R1 and V1.
Electronic
Device
Out 5-24 Volts
GND
74HCxx
6.8 K
Ω
47 K
Ω
Trigger Input
Connection
Ground
Connection
Output
Ground
+5VDC
AUX-P
+5V
GND
Pulled up
to +5V
(sourcing)
OEM-AT6400
GND
V1
R1
R
If you will be connecting to a combination of sourcing and sinking outputs,
connect
AUX-P
to
+5V
to accommodate sinking output devices. Then for each
individual input connected to a sourcing output, wire an external resistor between
the OEM-AT6400's trigger input terminal and ground (see illustration). The
resistor provides a path for current to flow from the device when the output is
active.
PROGRAMMING TIP
Connecting to a sinking output? Set the trigger input's active level to low
with the
INLVL
command (
Ø
= active low,
default setting).
Connecting to a sourcing output? Set the trigger input's active level to
high with the
INLVL
command (
1
= active high).
Thus, when the output is active, the
TIN
status command will report a “
1
”
(indicates that the input is active), regardless of the type of output that is
connected.
For details on setting the active level and checking the input status refer to the
INLVL
and
TIN
command descriptions in the
6000 Series Software
Reference Guide.
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