NI-9477 Specifications

Definitions

Warranted specifications describe the performance of a model under stated operating conditions and are covered by the model warranty.

Characteristics describe values that are relevant to the use of the model under stated operating conditions but are not covered by the model warranty.

  • Typical specifications describe the performance met by a majority of models.
  • Nominal specifications describe an attribute that is based on design, conformance testing, or supplemental testing.

Specifications are Typical unless otherwise noted.

Conditions

Specifications are valid for the range -40 °C to 70 °C unless otherwise noted. All voltages are relative to COM unless otherwise noted.

NI-9477 Pinout



Table 1. NI-9477 Signal Descriptions
Signal Description
COM Common reference connection
DO Digital output signal connection
NC No connection

Output Characteristics

Number of channels

32 digital output channels

Output type

Sinking

Power-on output state

Channels off[1]1 The module may experience a 3 ms to 4 ms glitch on the output during a chassis power cycle or software reset.

Output voltage (V0)

I0 · R0

External power supply voltage range

0 V DC to 60 V DC

Continuous output current (I0)

Per channel

1 A maximum, on up to 20 channels

Module (sum of all channels)

20 A maximum

Output impedance (R0)

0.065 Ω maximum

Reversed-voltage protection

None

Short-circuit protection

None

Maximum update rate

8 μs maximum

Propagation delay

1 μs maximum

MTBF

717,920 hours at 25 °C; Bellcore Issue 2, Method 1, Case 3, Limited Part Stress Method

Environmental Characteristics

Temperature

Operating

-40 °C to 70 °C

Storage

-40 °C to 85 °C

Humidity

Operating

10% RH to 90% RH, noncondensing

Storage

5% RH to 95% RH, noncondensing

Ingress protection

IP40

Pollution Degree

2

Maximum altitude

2,000 m

Shock and Vibration
Operating vibration

Random

5 g RMS, 10 Hz to 500 Hz

Sinusoidal

5 g, 10 Hz to 500 Hz

Operating shock

30 g, 11 ms half sine; 50 g, 3 ms half sine; 18 shocks at 6 orientations

To meet these shock and vibration specifications, you must panel mount the system.

Safety Voltages

Connect only voltages that are within the following limits:

Channel-to-COM[2]2 The maximum voltage that can be applied or output between a channel and COM without creating a safety hazard.

60 V DC maximum, Measurement Category I

Isolation

Channel-to-channel

None

Channel-to-earth ground

Continuous

60 V DC, Measurement Category I

Withstand

1,000 V RMS, verified by a 5 s dielectric withstand test

Caution Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV.
Attention Ne pas connecter le produit à des signaux dans les catégories de mesure II, III ou IV et ne pas l'utiliser pour effectuer des mesures dans ces catégories.
Warning Do not connect the product to signals or use for measurements within Measurement Categories II, III, or IV, or for measurements on MAINs circuits or on circuits derived from Overvoltage Category II, III, or IV which may have transient overvoltages above what the product can withstand. The product must not be connected to circuits that have a maximum voltage above the continuous working voltage, relative to earth or to other channels, or this could damage and defeat the insulation. The product can only withstand transients up to the transient overvoltage rating without breakdown or damage to the insulation. An analysis of the working voltages, loop impedances, temporary overvoltages, and transient overvoltages in the system must be conducted prior to making measurements.
Mise en garde Ne pas connecter le produit à des signaux dans les catégories de mesure II, III ou IV et ne pas l'utiliser pour des mesures dans ces catégories, ou des mesures sur secteur ou sur des circuits dérivés de surtensions de catégorie II, III ou IV pouvant présenter des surtensions transitoires supérieures à ce que le produit peut supporter. Le produit ne doit pas être raccordé à des circuits ayant une tension maximale supérieure à la tension de fonctionnement continu, par rapport à la terre ou à d'autres voies, sous peine d'endommager et de compromettre l'isolation. Le produit peut tomber en panne et son isolation risque d'être endommagée si les tensions transitoires dépassent la surtension transitoire nominale. Une analyse des tensions de fonctionnement, des impédances de boucle, des surtensions temporaires et des surtensions transitoires dans le système doit être effectuée avant de procéder à des mesures.

Measurement Category I is for measurements performed on circuits not directly connected to the electrical distribution system referred to as MAINS voltage. MAINS is a hazardous live electrical supply system that powers equipment. This category is for measurements of voltages from specially protected secondary circuits. Such voltage measurements include signal levels, special equipment, limited-energy parts of equipment, circuits powered by regulated low-voltage sources, and electronics.

Note Measurement Categories CAT I and CAT O are equivalent. These test and measurement circuits are for other circuits not intended for direct connection to the MAINS building installations of Measurement Categories CAT II, CAT III, or CAT IV.

Power Requirements

Power consumption from chassis

Active mode

650 mW maximum

Sleep mode

25 μW maximum

Thermal dissipation (at 70 °C)

Active mode

1.5 W maximum

Sleep mode

25 μW maximum

Physical Characteristics

Dimensions

Visit ni.com/dimensions and search by module number.

Weight

145 g (5.1 oz)

1 The module may experience a 3 ms to 4 ms glitch on the output during a chassis power cycle or software reset.

2 The maximum voltage that can be applied or output between a channel and COM without creating a safety hazard.