Specifications

Digital I/O

Number of channels ........................ 16 (eight optically isolated digital input channels and eight non-latching relay output channels)
Data transfers .................................. Interrupts, programmed I/O
I/O connector .................................. 37-pin male D-SUB

Isolated Inputs
Number of input channels............... 8 (each bipolar and isolated from other channels)
Input voltage range ......................... –30 VDC to 30 VDC, P0.X+ to P0.X–

Isolation
Channel-to-channel .................... 60 VDC continuous1

Digital logic levels

Input current
11 V inputs ................................. 4.5 mA/channel max
30 V inputs ................................. 12.5 mA/channel max
Propagation delay ........................... 45 μs typ

Electromechanical Relay Outputs
Number of channels ........................ 8
Relay types ......................................3 non-latching SPDT (Form C),
5 non-latching SPST (Form A)

Power-on state .................................De-energized, default; user-programmable to de-energized or energized

Note The response time of programmable power-up states is 400 ms.

Default power-off state....................Relays de-energized

Caution The maximum switching current is limited by the maximum switching power, the maximum voltage, and must not exceed 60 W/60 VA.

Contact rating
Maximum switching power ........60 W/60 VA
Maximum voltage (AC)..............42.4 Vpk/30 Vrms
Maximum voltage (DC)..............60 VDC
Maximum current .......................2 A2

DC path resistance
Initial...........................................0.2 Ω
End of life ...................................≥1.0 Ω
Relay operate time...........................2 ms typ, 4 ms max

Expected relay life
Mechanical..................................100,000,000 cycles
Electrical
30 VDC, 1 ADC resistive.......500,000 cycles
30 VDC, 2 ADC resistive.......100,000 cycles

Power Requirement
5 V (±5 %).......................................400 mA typ, 600 mA max

Physical Characteristics
Dimensions......................................17.5 cm × 9.9 cm (6.9 in. × 3.9 in.)
Weight .............................................150.0 g (5.29 oz)

Environmental
The NI 6520 device is intended for indoor use only.

Operating Environment
Ambient temperature range .............0 to 55 °C (tested in accordance with IEC-60068-2-1 and IEC-60068-2-2)
Relative humidity range.................. 10 to 90%, noncondensing (tested in accordance with IEC-60068-2-56)
Altitude ........................................... 2,000 m (at 25 °C ambient temperature)
Pollution Degree ............................. 2

Storage Environment
Ambient temperature range ............ –20 to 70 °C (tested in accordance with IEC-60068-2-1 and IEC-60068-2-2)
Relative humidity range.................. 5 to 95%, noncondensing
(tested in accordance with IEC-60068-2-56)

Safety
This product meets the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use:
• IEC 61010-1, EN 61010-1
• UL 61010-1, CSA 61010-1