Registers
21
relay is open, the corresponding bit value read is ‘0’. If the relay is
closed, the bit value read is ‘1’.
3.4 Isolation Input Registers
There are 8 isolated input channels on the PCI-7250 / 7251 board.
The status of the 8 channels can be read from the isolation input
register. Each bit corresponds to each channel. Bit value “1”
means input voltage is high and “0” means input voltage is low.
Note
:
Bits 8-15 are for cPCI-7252 only
Bit
7
6
5
4
3
2
1
0
Relay Output
DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0
Output Readback RB7 RB6 RB5 RB4 RB3 RB2 RB1 RB0
Table 3-3: Data Format of Relay Output and Readback Status Registers
Bit
7
6
5
4
3
2
1
0
Iso. Input DI7
DI6
DI5
DI4
DI3
DI2 DI1 DI0
Bit
15
14
13
12
11
10
9
8
Iso. Input DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8
Table 3-4: Relay Output
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 ...