RM-24999 Specifications
- Updated2025-06-26
- 5 minute(s) read
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 0 °C to 55 °C unless otherwise noted.
RM-24999 Pinout
- Mounting Holes (4x)
- RJ50 Connectors (8 per position)
- LED status indicator (1 per position)
| Pin | Signal | Description |
|---|---|---|
| 1 | QTR/SC | Quarter bridge completion signal, Shunt calibration signal |
| 2 | AI+ | Positive differential analog input signal |
| 3 | AI- | Negative differential analog input signal |
| 4 | RS+ | Positive remote sense signal |
| 5 | RS- | Negative remote sense signal |
| 6 | EX+ | Positive excitation signal for bridge modes |
| 7 | EX- | Negative excitation signal for bridge modes |
| 8 | T+ | TEDS data |
| 9 | T- | TEDS ground |
| 10 | — | No connect |
- Chassis Ground
- 96-Pin DIN Cable Connector (1 per position)
Input Characteristics
Number of channels | 8 analog input channels per position |
Trace resistance QTR, EX+, and EX- | 0.22 Ω |
Mechanical
RJ50 mean number of insertions before failure | 500 |
Connectors
RJ50 | 24 |
96-pin DIN | 3 |
Physical
Dimensions | 482.6 mm (19 in.) × 43.94 mm(1.730 in.) × 156.21 mm(6.150 in.) |
Weight | 1,595 g (56.3 oz) |
Safety Guidelines
Measurement category | I |
Safety Compliance Standards
This product is designed to meet the requirements of the following electrical equipment safety standards for measurement, control, and laboratory use:
- IEC 61010-1, EN 61010-1
- UL 61010-1, CSA C22.2 No. 61010-1
Environmental
Operating temperature | 0 °C to 55 °C (Tested in accordance with IEC 60068-2-1 and IEC 60068-2-2. Meets MIL-PRF-28800F Class 3 low temperature limit and MIL-PRF-28800F Class 2 high temperature limit.) |
Storage temperature range | -40 °C to 71 °C (Tested in accordance with IEC 60068-2-1 and IEC 60068-2-2. Meets MIL-PRF-28800F Class 3 low temperature limit and MIL-PRF-28800F Class 2 high temperature limit.) |
Relative humidity range, operating | 0% to 60%, noncondensing |
Relative humidity range, storage | 5% to 95%, noncondensing (Tested in accordance with IEC 60068-2-78 ) |
Maximum altitude | 2,000 m (800 mbar) (at 25 °C ambient) |
Pollution Degree | 2 |
Indoor use only.
Environmental Management
NI is committed to designing and manufacturing products in an environmentally responsible manner. NI recognizes that eliminating certain hazardous substances from our products is beneficial to the environment and to NI customers.
For additional environmental information, refer to the Engineering a Healthy Planet web page at ni.com/environment. This page contains the environmental regulations and directives with which NI complies, as well as other environmental information not included in this document.
Electromagnetic Compatibility
This product meets the requirements of the following EMC standards for electrical equipment for measurement, control, and laboratory use:
- EN 61326-1 (IEC 61326-1): Class A emissions; Basic immunity
- EN 55011 (CISPR 11): Group 1, Class A emissions
- AS/NZS CISPR 11: Group 1, Class A emissions
- FCC 47 CFR Part 15B: Class A emissions
- ICES-001: Class A emissions
CE Compliance

This product meets the essential requirements of applicable European Directives, as follows:
- 2014/35/EU; Low-Voltage Directive (safety)
- 2014/30/EU; Electromagnetic Compatibility Directive (EMC)
- 2011/65/EU; Restriction of Hazardous Substances (RoHS)
- 2014/53/EU; Radio Equipment Directive (RED)
- 2014/34/EU; Potentially Explosive Atmospheres (ATEX)
Product Certifications and Declarations
Refer to the product Declaration of Conformity (DoC) for additional regulatory compliance information. To obtain product certifications and the DoC for NI products, visit ni.com/product-certifications, search by model number, and click the appropriate link.
EU and UK Customers
电子信息产品污染控制管理办法(中国RoHS)
NI Services
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