NI-9871 Specifications
- Updated2024-11-25
- 4 minute(s) read
NI-9871 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.
NI-9871
Pinout
The NI-9871 has four RJ-50 receptacles that provide connections for four RS485/RS422 devices.
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RJ-50 Pin | Signal Name* |
---|---|
1 | No Connect |
2 | TXD- |
3 | TXD+ |
4 | RTS- |
5 | CTS- |
6 | RXD- |
7 | RXD+ |
8 | RTS+ |
9 | CTS+ |
10 | GND |
*These signals are shared by all four RJ-50 connectors on the NI-9871.
The cables included with your kit convert the RJ-50 pinout to the standard NI pinout on a DB-9 male connector, as shown in the following table.
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RJ-50 Pin | Signal Name |
---|---|
1 | GND |
2 | CTS+ |
3 | RTS+ |
4 | RXD+ |
5 | RXD- |
6 | CTS- |
7 | RTS- |
8 | TXD+ |
9 | TXD- |
Specifications
Maximum baud rate | 3.6864 Mbps |
Maximum module throughput | 1.28 Mbps |
Maximum cable length | 1.2 km (4,000 ft) |
Data line ESD protection (human body model) | ±15 kV |
MTBF | 514,016 hours at 25 °C; Bellcore Issue 6, Method 1, Case 3, Limited Part Stress Method |
Power Requirements
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Required external supply voltage range (V sup) | +8 to +28 V DC | ||||||
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Physical Characteristics
If you need to clean the controller, wipe it with a dry towel.
Weight | Approx. 153 g (5.4 oz) |
Safety Voltages
Maximum Measurement
Voltages
Connect only voltages that are within these limits.
RS485/RS422 Port-to-COM | -8 to +13 VDC maximum, Measurement Category I |
V sup-to-COM | ±28 V maximum, Measurement Category I |
Isolation Voltages
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Measurement Category I
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.
Environmental Characteristics
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Ingress protection | IP30 | ||||||||||||
Pollution Degree | 2 | ||||||||||||
Maximum altitude | 5,000 m | ||||||||||||
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To meet these shock and vibration specifications, you must panel mount the system.
Indoor use only.