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Interconnections
26
Logic Inputs
The HPV 900 Series 2’s nine programmable
logic inputs are opto-isolated. The inputs
become “true” by closing contacts or switches
between the logic input terminal and voltage
source common (or voltage source). The
voltage supply for the logic inputs is 24VDC.
The choices for the voltage source common
(or voltage source) depend on if the user is
using an external voltage supply or using the
internal voltage supply.
Figure 9 shows the connection for using the
internal voltage supply. And in this case, the
voltage source common is TB1-21 (+24VDC
isolated).
Figure 9: Logic Inputs Sourcing Operation
(Low True - Internal Supply)
Figure 10 shows the connection for using the
internal voltage supply. And in this case, the
voltage source common is TB1-23 (+24VDC
isolated common).
Figure 10: Logic Inputs Sinking Operation
(High True - Internal Supply)
+24VDC isolated
6
7
8
9
10
11
24
25
26
21
22
23
TB1
logic input 1
logic input 2
logic input 3
logic input 4
logic input 5
logic input 6
logic input 7
logic input 8
logic input 9
logic input common
+24VDC iso. common
+24VDC isolated
+24VDC iso. common
logic input common
6
7
8
9
10
11
24
25
26
21
22
23
TB1
logic input 1
logic input 2
logic input 3
logic input 4
logic input 5
logic input 6
logic input 7
logic input 8
logic input 9
Содержание HPV 900 Series 2
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