Справочник Пользователя для National Instruments DAQ 6527

Figure 3-5.  Signal Connections for Solid-State Relays

Writing a 0 (logic low) to an output bit closes the relay, and writing a 1 
(logic high) opens the relay.

To both sink and source current with one channel requires an external 
resistor. You can use the solid-state relays of a 6527 device with external 
resistors to drive voltages at TTL or non-TTL levels, from -60 to 60 VDC 
or 30 VAC (42 V peak). 

For isolated power, total current on all channels exceeding 1 A, or voltages 
other than +5 V, you can provide an external power supply. For driving 
non-isolated +5 V outputs totaling less than 1 A—for example, when using 
the 6527 as a TTL-level output device—you can use the +5 V line from the 
6527 device as your voltage source.

Load

R

S

I

f

+5 V

Supply

+

–

Isolation

Isolated
Ground

Digital
Logic

390 

Ω

DIG+

6527

DIG–

Load

R

S

I

f

+5 V

Supply

+

–

Isolation

Isolated
Ground

Digital
Logic

390 

Ω

 

DIG+

6527

DIG–

a. Sinking Current

b. Sourcing Current

35 

Ω

35 

Ω

LH1546

LH1546