National Instruments NI 9870 Bedienungsanleitung

GETTING STARTED GUIDE

NI 9870

4-Port, RS232 Serial Module

This document explains how to connect to the NI 9870.

Note Before you begin, complete the software and

hardware installation procedures in your chassis

documentation.

Note The guidelines in this document are specific to

the NI 9870. The other components in the system might

not meet the same safety ratings. Refer to the

documentation for each component in the system to

determine the safety and EMC ratings for the entire

system.

Safety Guidelines

Operate the NI 9870 only as described in this document.

Hot Surface This icon denotes that the component

may be hot. Touching this component may result in

bodily injury.

Caution Do not operate the NI 9870 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

2| ni.com | NI 9870 Getting Started Guide

way. If the product is damaged, return it to NI for

repair.

Safety Guidelines for Hazardous Locations

The NI 9870 is suitable for use in Class I, Division 2, Groups A,

B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC T4

and Ex nA IIC T4 hazardous locations; and nonhazardous

locations only. Follow these guidelines if you are installing the

NI 9870 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 Class I, Division 2.

Caution For Division 2 and Zone 2 applications,

install the system in an enclosure rated to at least IP54

as defined by IEC/EN 60079-15.

NI 9870 Getting Started Guide | © National Instruments Corporation | 3

Caution For Zone 2 applications, install a protection

device between the RS232 signal cables and the

NI 9870 RJ-50 jacks (ports 1 to 4). The device must

prevent the RS232 signal-to-signal or signal-to-COM

voltage from exceeding 35 V if there is a transient

overvoltage condition.

Caution For Zone 2 applications, install a protection

device between the external power supply and the

NI 9870 Vsup and COM pins. The device must prevent

the Vsup-to-COM voltage from exceeding 39 V if there

is a transient overvoltage condition.

Special Conditions for Hazardous Locations Use in

Europe and Internationally

The NI 9870 has been evaluated as Ex nA IIC T4 Gc equipment

under DEMKO Certificate No. 07 ATEX 0626664X and is

IECEx 14.0089X certified. Each NI 9870 is marked II 3G and

is suitable for use in Zone 2 hazardous locations, in ambient

temperatures of -40 °C ≤ Ta ≤ 70 °C. If you are using the NI 9870

in Gas Group IIC hazardous locations, you must use the device in

an NI chassis that has been evaluated as Ex nC IIC T4, Ex IIC

T4, Ex nA IIC T4, or Ex nL IIC T4 equipment.

4| ni.com | NI 9870 Getting Started Guide

Caution You must make sure that transient

disturbances do not exceed 140% of the rated voltage.

Caution The system shall only be used in an area of

not more than Pollution Degree 2, as defined in

IEC 60664-1.

Caution The system shall be mounted in an

ATEX/IECEx-certified enclosure with a minimum

ingress protection rating of at least IP54 as defined in

IEC/EN 60079-15.

Caution The enclosure must have a door or cover

accessible only by the use of a tool.

Special Conditions for Marine Applications

Some products are Lloyd’s Register (LR) Type Approved for

marine (shipboard) applications. To verify Lloyd’s Register

certification for a product, visit ni.com/certification and search

for the LR certificate, or look for the Lloyd’s Register mark on

the product.

Caution In order to meet the EMC requirements for

marine applications, install the product in a shielded

enclosure with shielded and/or filtered power and

NI 9870 Getting Started Guide | © National Instruments Corporation | 5

input/output ports. In addition, take precautions when

designing, selecting, and installing measurement probes

and cables to ensure that the desired EMC performance

is attained.

Wiring the NI 9870

The NI 9870 has four RJ-50 receptacles that provide connections

for four RS232 devices.

6| ni.com | NI 9870 Getting Started Guide

Table 1. RS232 Port Pinout

RJ-50 Pin Signal Name*

DCD

CTS

RTS

DSR

COM

DTR

TXD

RXD

RJ50 Jack

1 No Connect

2 RI

3 CTS

4 RTS

5 DSR

6 GND

7 DTR

8 TXD

9 RXD

10 DCD

*These signals are shared by all four RJ-50 connectors on the NI 9870.

NI 9870 Getting Started Guide | © National Instruments Corporation | 7

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

Table 2.

Table 2. Pin Assignments for RS232 DB-9 Male Connector

Connector RJ-50 Pin Signal Name

1 DCD

2 RXD

3 TXD

4 DTR

5 GND

6 DSR

7 RTS

8 CTS

9 RI

8| ni.com | NI 9870 Getting Started Guide

You must connect an external power supply to the NI 9870. This

power supply provides the power for the RS232 transceivers on

the module. You can use the included female four-position pigtail

to connect to an external voltage source. Figure 1 lists the

connections between an external voltage source

(of +8 V to +28 V) and the NI 9870.

Caution To ensure the specified EMC performance,

do not connect the power input to a DC mains supply

or to any supply requiring a connecting cable longer

than 30 m (100 ft). A DC mains supply is a local DC

electricity supply network in the infrastructure of a

certain site or building.

NI 9870 Getting Started Guide | © National Instruments Corporation | 9

Figure 1. Four-Position External Power Connector

1. VSUP

2. VSUP

3. COM

4. COM

Figure 2 shows the method of power connection to the NI 9870

module. Attach an isolated power supply to the VSUP and COM

terminals using the included pigtail.

10 | ni.com | NI 9870 Getting Started Guide

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