The
DCP31
is provided with four external switch inputs as standard (eight optional). The op-
tional eight inputs are located on the add-on terminal base. Wire the external switch inputs
across the standard and add-on terminal bases.
Handling Precautions
• The external switch inputs on the DCP31 have built-in power
supplies (open voltage 12 Vdc). Be sure to use no-voltage con-
tacts for external contacts.
• Use no-voltage contacts such as gold contacts whose small cur-
rent can be switched ON/OFF. On some relay contacts, the small
current cannot be switched ON/OFF. Use no-voltage contacts
having a sufficient minimum switching capability with respect to
the contact current and open voltage of the DCP31.
• When using a semiconductor (e.g. open-collector) as a no-
voltage contact, use a semiconductor whose contact terminal
voltages at contact ON are 3 V max., and whose leakage current
at contact OFF is 0.1 mA.
• External switch inputs on the DCP31, DCP32, and SDC40 series
can be connected in parallel.
When connecting in parallel with other controllers, thoroughly
check the conditions of the other controller before configuring
the control system.
25
23
24
21
22
RSW1
RSW2
RSW3
RSW4
Contact
Contact
Contact
Contact
COM
45
43
44
41
42
48
46
47
RSW5
RSW6
RSW7
RSW8
RSW10
RSW11
RSW12
RSW9
Contact
Contact
Contact
Contact
Contact
Contact
Contact
Contact
4-15
Chapter 4. WIRING
4 - 12
Connecting External Switch (RSW) Input
