Chapter 1. Installation
1 7
INPUT CONNECTIONS —
Connecting to electronic devices such as PLCs
Connection to a
Sinking Output
D e v i c e
Connection to a
Sourcing Output
D e v i c e
Connection to a
Combination of
Sinking &
Sourcing
O u t p u t s
Electronic
Device
Out 5-24 Volts
GND
74HCxx
6.8 K
W
47 K
W
Input
Connection
Ground
Connection
Output
Ground
IN-P
+5V
GND
Pulled up
to +5V
(sourcing)
The output should
be able to sink at
least 1mA of current.
OEM6250
GND
+5VDC
R12
(0 K
W
)
Remove if you wish
to use an external
5-24V power source.
Electronic
Device
Out 5-24 Volts
GND
74HCxx
47 K
W
Input
Connection
Ground
Connection
Output
Ground
IN-P
+5V
GND
Pulled
down to
ground
(sinking)
OEM6250
GND
V1
R1
+5VDC
R12
(0 K
W
) is
removed.
6.8 K
W
Electronic
Device
Out 5-24 Volts
GND
74HCxx
47 K
W
Input
Connection
Ground
Connection
Output
Ground
IN-P
+5V
GND
OEM6250
GND
V1
R1
R
+5VDC
R12
(0 K
W
)
Remove if you wish
to use an external
5-24V power source.
6.8 K
W
Pulled up
to +5V
(sourcing)
The value of R must be < 6.8 K
W
and sized such that V
A
< 1.0V when the output is
open and V
A
> 3.4V when the output is closed.
R
1
must be < R. If R
1
is 0
W
, the typical value for R is 450
W
.
V
A
PROGRAMMING TIP
Connecting to a
sinking output? Set the
input’s active level to low
with the
INLVL
command
(
¯
= active low).
Connecting to a
sourcing output? Set
the 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.
Details on setting the active
level and checking the input
status are provided in the
6000 Series Programmer’s
Guide. Refer also to the
INLVL
and
TIN
command
descriptions in the
6000
Series Software Reference.
NOTE: If you will be connecting to a combination of sourcing and sinking outputs, leave
IN-P
internally connected to
+5V
(or remove R12 and connect
IN-P
to an external 5-24VDC supply)
to accommodate sinking output devices. Then for each individual input connected to a
sourcing output, wire an external resistor between the OEM6250’s programmable input
terminal and ground (see “R” in above drawing). The resistor provides a path for current to
flow from the device when the output is active.
