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Manual National Instruments FP-RLY-420

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  • National Instruments FP-RLY-420 - page 1

    FieldPoint ™ is a trademark of National Instruments Corporation. Product a nd company names mentioned herein are trad emarks or trade na mes of their resp ective companies. 321904B-01 © Copyright 1998, 1999 National Instruments Corp. All rights reserved. June 1999 OPERA TING INSTR UCTIONS FP-RLY-420 8-Channel, SPST Relay Module These operating i ...

  • National Instruments FP-RLY-420 - page 2

    FP-RLY-420 2 www.natinst.com module. The maximum number of terminal bases per bank multiplied by 1 watt is the total po wer the network module can supply . For e xample, an FP-1000 or FP-1001 can support nine terminal bases (9*1 W = 9 W). Next, refer to the specif ications section in the operating instructions for the I/O modules. Use the P ower fr ...

  • National Instruments FP-RLY-420 - page 3

    © National Instruments Corp. 3 FP-RLY-420 Field Wiring The terminal base has connections for each of th e eight relay channels and an extern al supply to po wer f ield de vices. Each relay channel of the FP-RL Y -420 has two terminals: N.O. (Normally Open) and I.C. (Isolated Common). The external supply is not needed for the internal operation of ...

  • National Instruments FP-RLY-420 - page 4

    FP-RLY-420 4 www.natinst.com Figures 2a and 2b sho w examples of basic wiring connections. Figure 2. Basic Field Connection (T wo Channels Shown) Relay Output Circuit The outputs of the FP-RL Y -420 consist of Form A electromechanical relays. The po wer -up state is off (open) to ensure safe installation. In the ON state, the N.O. and I.C. contacts ...

  • National Instruments FP-RLY-420 - page 5

    © National Instruments Corp. 5 FP-RLY-420 Figure 3 shows the diagram of one channel’ s relay output circuit. Figure 3. Relay Output Circuit The maximum switching capacity of each relay is 3 A up to 250 V A C or 35 VDC. T o switch greater DC v oltages, refer to Figure 4. Figure 4. Maximum Current vs. DC Volts Contact Protection for Inductive Load ...

  • National Instruments FP-RLY-420 - page 6

    FP-RLY-420 6 www.natinst.com In addition, the FP-RL Y -420 contains its ow n internal protection MO V to preve nt e xcessi vely high voltage from being applied across the contacts. The MO V is located between the N.O. and I.C. contacts of each relay , but National I nstruments still recommends the use of a protection circuit across your inducti v e ...

  • National Instruments FP-RLY-420 - page 7

    © National Instruments Corp. 7 FP-RLY-420 Diode Circuit CR Circuits Varistor Circuit Diagram Notes Use in DC applications only . Compared to RC type, circuit delays release time (2 to 5 times v alues stated in catalog). For larger v oltages, use diode with rev erse breakdown 10 times circuit voltage and forward load ci rcuit. For smaller v oltages ...

  • National Instruments FP-RLY-420 - page 8

    FP-RLY-420 8 www.natinst.com In-Rush Current The type of load and its in -rush current characteristics, together with switching frequency , can cause contact welding. F or loads with in-rush current, measure the steady state current and in-rush current to determine the proper relay . Some typical types of loads and the in-rush current the y create ...

  • National Instruments FP-RLY-420 - page 9

    © National Instruments Corp. 9 FP-RLY-420 After the module has been inserted into a terminal base ( and po wer is applied), the green POWER indicator lights and the FP-RL Y -420 informs the network mod ule of its presence. When the network module recognizes the FP-RL Y -420, the network module sends initial configuration information to the FP-R L ...

  • National Instruments FP-RLY-420 - page 10

    FP-RLY-420 10 www.natinst.com •D o not share the external supply voltages (V and C on the terminal base) with other de vices (including other FieldPoint de vices) unless those devices are also isolated from human contact. • As with any hazardous voltage wiring, ensure that all wiring and connections meet with applicable electrical codes or comm ...

  • National Instruments FP-RLY-420 - page 11

    © National Instruments Corp. 11 FP-RLY-420 Maximum switching frequenc y Mechanical ................... ............. . 20 operations per second Electrical..................................... 1 operation per second at maximum load Relays operate time.... ............. .......... 6 ms typical, 8 ms max. Relays release time ...................... .. ...

  • National Instruments FP-RLY-420 - page 12

    Mechanical Dimensions Figure 6 sho ws the mechanical dimensions of the FP-RL Y -420 installed onto a terminal base. Dimensions are gi ven in inches [millimeters]. Figure 6. Mechanical Di mensions 4.31 [109.5] 3.60 [91.44] 4.22 [107.19] ...

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Documents that we receive from a manufacturer of a National Instruments FP-RLY-420 can be divided into several groups. They are, among others:
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All of them are important, but the most important information from the point of view of use of the device are in the user manual National Instruments FP-RLY-420.

A group of documents referred to as user manuals is also divided into more specific types, such as: Installation manuals National Instruments FP-RLY-420, service manual, brief instructions and user manuals National Instruments FP-RLY-420. Depending on your needs, you should look for the document you need. In our website you can view the most popular manual of the product National Instruments FP-RLY-420.

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A complete manual for the device National Instruments FP-RLY-420, how should it look like?
A manual, also referred to as a user manual, or simply "instructions" is a technical document designed to assist in the use National Instruments FP-RLY-420 by users. Manuals are usually written by a technical writer, but in a language understandable to all users of National Instruments FP-RLY-420.

A complete National Instruments manual, should contain several basic components. Some of them are less important, such as: cover / title page or copyright page. However, the remaining part should provide us with information that is important from the point of view of the user.

1. Preface and tips on how to use the manual National Instruments FP-RLY-420 - At the beginning of each manual we should find clues about how to use the guidelines. It should include information about the location of the Contents of the National Instruments FP-RLY-420, FAQ or common problems, i.e. places that are most often searched by users in each manual
2. Contents - index of all tips concerning the National Instruments FP-RLY-420, that we can find in the current document
3. Tips how to use the basic functions of the device National Instruments FP-RLY-420 - which should help us in our first steps of using National Instruments FP-RLY-420
4. Troubleshooting - systematic sequence of activities that will help us diagnose and subsequently solve the most important problems with National Instruments FP-RLY-420
5. FAQ - Frequently Asked Questions
6. Contact detailsInformation about where to look for contact to the manufacturer/service of National Instruments FP-RLY-420 in a specific country, if it was not possible to solve the problem on our own.

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