Measurement-computing CIO-DIO24 Manual do Utilizador descarregar pdf (Página 15)

CIO-DIO24 User's Guide Functional Details

2.2 K SIP installed for pull-up

2.2 K SIP

Dot

+5 VDC

(GND)

User Connector

Digital I/O Lines

COM

Digital

I/O

Port

n = A, B, or C

2.2 K SIP

Dot

+5 VDC

(GND)

User Connector

Digital I/O Lines

COM

2.2 K SIP installed for pull-down

Digital

I/O

Port

n = A, B, or C

Figure 9. Pull-up and pull-down resistor SIPs schematic

To pull-up lines, orient the SIP with the common pin (dot) toward the HI end; to pull-down, install the resistor

with the common pin in the

LO hole.

When installing pull-up and pull-down resistor SIP packs, we recommend using 2.2K, eight-resistor Single

Inline Packages (MCC part number SP-K2.29C). Use a different value only if necessary.

Unconnected inputs float

Unconnected inputs typically float high, but not reliably. If you are using a CIO-DIO24 for input and have

unconnected inputs, ignore the data from those lines. You do not have to terminate input lines. Unconnected

lines will not affect the performance of connected lines. Mask out any unconnected bits in software.

Digital I/O Isolation

To provide external signal conditioning and isolation, you can connect the CIO-DIO24 to a CIO-ERB24 or

SSR-RACK24. The CIO-ERB24 provides 24 Form C electromechanical relays. The SSR-RACK24 is a

mounting rack for 24 solid-state relays.

1 2 ... 10 11 12 13 14 15 16 17 18 19 20

Sem comentários

Measurement-computing CIO-DIO24 Manual do Utilizador Página 15