2
4.
Wiring Instructions
4.1
Input Wiring Options
There are six input wiring options:
Normally Open
Normally Closed
Normally Open Supervised with one or two resistors
Normally Closed Supervised with one or two resistors
Normally Open Switch
Normally Closed Switch
Figure 3 shows the normally open input connection.
Figure 3: Normally Open Input
Figure 4 shows the normally closed input connection.
Figure 4: Normally Closed Inputs
Figure 5 shows the normally open supervised input connection with
single resistor.
Figure 5: Normally Open Supervised Inputs with Single Resistor
Normally Open Supervised inputs with one resistor must be connected
with an 8.2K resistor in parallel to the input switch contacts.
Always wire resistors on the input switch and not on the
terminal block.
Figure 6 shows the normally open supervised input connection with
double resistor.
Figure 6: Normally Open Supervised Inputs with Double Resistor
Normally Open Supervised inputs with two resistors must be connected
with an 8.2K resistor in parallel and a 2.2K resistor in series to the
input switch contacts.
Figure 7 shows the normally closed supervised input connection with
single resistor.
Figure 7: Normally Closed Supervised Input with Single Resistor
Normally Closed Supervised inputs with a single resistor must be
connected with a 2.2K resistor in series to the input switch contacts.
Figure 8 shows the normally closed supervised input connection with
double resistor.
Figure 8: Normally Closed Supervised Input with Double Resistors
Normally Closed Supervised inputs with two resistors must be
connected with an 8.2K resistor in parallel and a 2.2K resistor in series
to the input switch contacts.
Normally Open
Switch
Normally Closed
Switch
Normally Open
Switch
Normally Open
Switch
Normally Closed
Switch
Normally Closed
Switch