24
Operation Theory
2. Form A Relay: (R4 - R7)
Figure 4-2: Form A Relay
Form A relay only has two contacts: NO (Normal Open) and COM
(Common). The COM post can make contact either with the NO
post or not. When the control bit is high (1), the COM post and NO
post are contacted. If the control bit is low (0), the COM post and
NO post does not make contact.
In normal power-up and reset, the relay is in
low
status.
The relay output contacts are rated at a maximum of 0.5A at
120VAC (resistive), 1A 24VDC, or 0.3A 60VDC. You should
reduce these ratings for inductive loads. For more information on
relay contact, please refer to the Appendix.
NO
Control Bit = High(1)
COM
NO
Control Bit = Low(0)
COM
Summary of Contents for cPCI-7252
Page 4: ......
Page 10: ......
Page 18: ...8 Introduction ...
Page 20: ...10 Installation 2 2 PCB Layout PCI 7250 PCB Layout Figure 2 1 PCI 7250 Layout ...
Page 21: ...Installation 11 cPCI 7252 PCB Layout Figure 2 2 cPCI 7252 Layout ...
Page 28: ...18 Installation ...
Page 32: ...22 Registers ...
Page 43: ...C C Libraries 33 Return Code ERR_NoError ERR_BoardNoInit ...
Page 48: ...38 C C Libraries ...
Page 52: ...42 Appendix ...