AMCI SD4840EK, Руководство пользователя

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SD4840EK User Manual
I
NSTALLING THE
SD4840EK
87
2.5 Input Wiring
Figure T2.5 below shows how to wire discrete DC sourcing or sinking sensors to Inputs 1, 2, and 3 of the
SD4840EK.
Figure T2.5 Input Wiring
2.5.1 Cable Shields
Because they are low power signals, cabling from the sensor to the SD4840EK should be done using a twisted
pair cable with an overall shield. The shield should be grounded at the end when the signal is generated, which
is the sensor end. If this is not practical, the shield should be grounded to the same ground bus as the
SD4840EK.
2.6 Output Wiring
The SD4840EK output is an optically isolated
transistor that is capable of driving a typical
PLC input. Both ends are uncommitted, so it
can be wired as a sinking or sourcing output.
Electrical Specifications
R
LIMIT
A resistor may be needed to limit the current
through the output. The value, and power rating
of the resistor is dependent on the value of Vdc,
the voltage drop across the input, and the cur-
rent requirements of the input.
Input “n” –
Input “n” –
Input “n” +
Input “n” +
+
+
+
+
–
–
5 to
24 Vdc
5 to
24 Vdc
PNP
Sourcing
Sensor
NPN
Sinking
Sensor
Out
Out
2.5.1
2.5.1
Figure T2.6 Output Wiring
R *
LIMIT
SD4840EK Output - Sinking Connection
R *
LIMIT
SD4840EK Output - Sourcing Connection
Shielded, Twisted
Pair Cable
Shielded, Twisted
Pair Cable
V max:
DC
V :
CE SAT 30Vdc
1Vdc @ 20 mA
Power Dissipation: 20 mW max.
20 mA