English dropdown-ico

National Instruments FP-RLY-420 manual

1
2
3
4
5
6
7
8
9
10
11
12

Go to page of

Similar user manuals

A good user manual

The rules should oblige the seller to give the purchaser an operating instrucion of National Instruments FP-RLY-420, along with an item. The lack of an instruction or false information given to customer shall constitute grounds to apply for a complaint because of nonconformity of goods with the contract. In accordance with the law, a customer can receive an instruction in non-paper form; lately graphic and electronic forms of the manuals, as well as instructional videos have been majorly used. A necessary precondition for this is the unmistakable, legible character of an instruction.

What is an instruction?

The term originates from the Latin word „instructio”, which means organizing. Therefore, in an instruction of National Instruments FP-RLY-420 one could find a process description. An instruction's purpose is to teach, to ease the start-up and an item's use or performance of certain activities. An instruction is a compilation of information about an item/a service, it is a clue.

Unfortunately, only a few customers devote their time to read an instruction of National Instruments FP-RLY-420. A good user manual introduces us to a number of additional functionalities of the purchased item, and also helps us to avoid the formation of most of the defects.

What should a perfect user manual contain?

First and foremost, an user manual of National Instruments FP-RLY-420 should contain:
- informations concerning technical data of National Instruments FP-RLY-420
- name of the manufacturer and a year of construction of the National Instruments FP-RLY-420 item
- rules of operation, control and maintenance of the National Instruments FP-RLY-420 item
- safety signs and mark certificates which confirm compatibility with appropriate standards

Why don't we read the manuals?

Usually it results from the lack of time and certainty about functionalities of purchased items. Unfortunately, networking and start-up of National Instruments FP-RLY-420 alone are not enough. An instruction contains a number of clues concerning respective functionalities, safety rules, maintenance methods (what means should be used), eventual defects of National Instruments FP-RLY-420, and methods of problem resolution. Eventually, when one still can't find the answer to his problems, he will be directed to the National Instruments service. Lately animated manuals and instructional videos are quite popular among customers. These kinds of user manuals are effective; they assure that a customer will familiarize himself with the whole material, and won't skip complicated, technical information of National Instruments FP-RLY-420.

Why one should read the manuals?

It is mostly in the manuals where we will find the details concerning construction and possibility of the National Instruments FP-RLY-420 item, and its use of respective accessory, as well as information concerning all the functions and facilities.

After a successful purchase of an item one should find a moment and get to know with every part of an instruction. Currently the manuals are carefully prearranged and translated, so they could be fully understood by its users. The manuals will serve as an informational aid.

Table of contents for the manual

  • 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[...]

  • 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[...]

  • 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 [...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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[...]

  • 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 [...]

  • 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 [...]

  • 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[...]

  • 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 ...................... ..[...]

  • 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][...]