4-12 Connecting External Switch (Rsw) Input - Honeywell DCP301 User Manual

Chapter 4. WIRING

4-12 Connecting External Switch (RSW) Input

The DCP301 is provided with four external switch inputs as standard (eight optional). The optional 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
4-14
Standard terminal base
RSW1
21
Contact
RSW2
22
Contact
RSW3
23
Contact
RSW4
24
Contact
25
COM
• The external switch inputs on the DCP301 have built-in power supplies (open
voltage 12Vdc). Be sure to use no-voltage contacts for external contacts.
• Use no-voltage contacts such as gold contacts whose small current 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 ca-
pability with respect to the contact current and open voltage of the DCP301.
• When using a semiconductor (e.g. open-collector) as a no-voltage contact, use
a semiconductor whose contact terminal voltages at contact ON are 3V max.,
and whose leakage current at contact OFF is 0.1mA.
• External switch inputs on the DCP301/302 can be connected in parallel.
When connecting in parallel with other controllers, thoroughly check the condi-
tions of the other controller before configuring the control system.
RSW5
Contact
RSW6
Contact
RSW7
Contact
RSW8
Contact
RSW9
Contact
RSW10
Contact
RSW11
Contact
RSW12
Contact
Add-on terminal base
41
42
43
44
45
46
47
48