NI-9350/9351 Explosive Atmospheres User Guide

Product Descriptions

NI-9350: 8-Channel C Series Functional Safety Module

NI-9351: 4-Channel C Series Functional Safety Module

Physical Characteristics

Weight (includes 26-pin spring terminal and connector backshell)
NI-9350 with Spring Terminal	210 g (7.4 oz)
NI-9351 with Spring Terminal	210 g (7.4 oz)

Dimensions

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

NI-9350

Spring terminal wiring

Wire length

61 cm (24 in.), minimum

COM jumper length

61 cm (24 in.), minimum

Gauge

0.50 mm² to 1.5 mm² (20 AWG to 16 AWG) copper conductor wire, if using single wire per spring terminal; 0.34 mm² (22 AWG) copper conductor wire, if using two wires per spring terminal

Wire strip length

10 mm (0.39 in.) of insulation stripped from the end

Insulation temperature rating

90 °C, minimum

Wires per spring terminal

One solid or stranded wire per spring terminal; two stranded wires per spring terminal using a two-wire ferrule

Ferrules
Single ferrule, uninsulated	0.50 mm² to 1.5 mm² (20 AWG to 16 AWG), 10 mm barrel length
Single ferrule, insulated	0.50 mm² to 1.0 mm² (20 AWG to 18 AWG), 12 mm barrel length
Two-wire ferrule, insulated	2x 0.34 mm² (2x 22 AWG), 12 mm barrel length

Connector securement
Securement type	Screw flanges provided
Torque for screw flanges	0.25 N · m (2.2 lb · in.)

NI-9351

Spring terminal wiring

Wire length

30 cm (12 in.), minimum

COM jumper length

30 cm (12 in.), minimum

Gauge

0.50 mm² to 1.5 mm² (20 AWG to 16 AWG) copper conductor wire, if using single wire per spring terminal; 0.34 mm² (22 AWG) copper conductor wire, if using two wires per spring terminal

Wire strip length

10 mm (0.39 in.) of insulation stripped from the end

Insulation temperature rating

90 °C, minimum

Wires per spring terminal

One solid or stranded wire per spring terminal; two stranded wires per spring terminal using a two-wire ferrule

Ferrules
Single ferrule, uninsulated	0.50 mm² to 1.5 mm² (20 AWG to 16 AWG), 10 mm barrel length
Single ferrule, insulated	0.50 mm² to 1.0 mm² (20 AWG to 18 AWG), 12 mm barrel length
Two-wire ferrule, insulated	2x 0.34 mm² (2x 22 AWG), 12 mm barrel length

Connector securement
Securement type	Screw flanges provided
Torque for screw flanges	0.25 N · m (2.2 lb · in.)

Environmental

Temperature
Operating	-40 °C to 70 °C
Storage	-40 °C to 85 °C

Ingress protection

IP40

Humidity
Operating	10% RH to 90% RH, noncondensing
Storage	5% RH to 95% RH, noncondensing

Pollution Degree

2

Maximum altitude

5,000 m

Indoor use only.

Hazardous Locations

Explosive atmospheres rating	Ex ec IIC T4 Gc
CCC certificate number	2021312310000312

Safety Guidelines

Operate the product only as described in this document.

Caution This icon denotes a caution, which advises you to consult documentation where this symbol is marked.

Caution Do not operate this product in a manner not specified in this document. Product misuse can result in a hazard. You can compromise the safety protection built into the product if the product is damaged in any way. If the product is damaged, return it to NI for repair.

Safety Guidelines for Hazardous Locations

These products have been evaluated as Ex ec IIC T4 Gc equipment and are CCC certified. Each product is suitable for use within ambient temperatures of -40 °C ≤ Ta ≤ 70 °C in either nonhazardous locations or Zone 2 hazardous locations. If you are using the products in Gas Group IIC hazardous locations, you must use the device in an NI chassis that has been evaluated as Ex ec IIC T4 Gc equipment.

Follow these guidelines if you are installing the product in a potentially explosive environment. Not following these guidelines may result in serious injury or death.

Caution Do not disconnect I/O-side wires or connectors unless power has been switched off or the area is known to be nonhazardous.

Caution Do not remove modules unless power has been switched off or the area is known to be nonhazardous.

Caution Substitution of components may impair suitability for Zone 2.

Caution Transient protection shall be provided that is set at a level not exceeding 140% of the peak rated voltage value of 85 V at the supply terminals to the equipment.

Caution The system shall only be used in an area of not more than Pollution Degree 2, as defined in IEC/EN 60664-1.

Caution The system shall be mounted in a CCC-certified enclosure with a minimum ingress protection rating of at least IP54 as defined in GB/T3836.1.

Caution The enclosure must have a door or cover accessible only by the use of a tool.

Safety Voltages

NI-9350

Connect only voltages that are within the following limits:

Vsup voltage input range

19 V DC to 30 V DC

Maximum voltages
Vsup-to-COM	30 V DC
DI-to-COM	30 V DC
DO-to-COM	0 V DC to Vsup

Caution Do not connect hazardous voltages to the product. A hazardous voltage is a voltage greater than 42.4 V peak voltage or 60 V DC to earth ground.

Caution DO channels are not protected for negative voltages or voltages greater than Vsup.

Isolation voltages

Channel-to-earth^[1]¹ Channels include Vsup and COM. (up to 5,000 m)
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.

NI-9351

Connect only voltages that are within the following limits:

Vsup voltage input range

19 V DC to 30 V DC

Maximum voltages
Vsup-to-COM	30 V DC
DI-to-COM	30 V DC
DO-to-COM	0 V DC to Vsup
AI-to-COM	20 V DC
AI Vsup-to-COM	30 V DC

Caution Do not connect hazardous voltages to the product. A hazardous voltage is a voltage greater than 42.4 V peak voltage or 60 V DC to earth ground.

Caution DO channels are not protected for negative voltages or voltages greater than Vsup.

Isolation voltages

Channel-to-earth^[2]² Channels include Vsup, AI Vsup, and COM. (up to 5,000 m)
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.

Installing C Series Modules

Verify that power is not connected to the I/O connector(s) on the C Series module.

Removing C Series Modules

Verify that power is not connected to the I/O connector(s) on the C Series module before you remove a module from the chassis.

Safety Compliance and Hazardous Locations 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
IEC 60079-0, IEC 60079-7
GB/T3836.1, GB/T3836.3

Note For safety certifications, refer to the product label or the Product Certifications and Declarations section.

Product Certifications and Declarations

To obtain product certifications and the DoC for NI products, visit ni.com/product-certifications, search by model number, and click the appropriate link.

Worldwide Support and Services

NI corporate headquarters is located at 11500 North Mopac Expressway, Austin, Texas, 78759-3504, USA.