National Instruments EIGHT CHANNEL SPST RELAY MODULE - Manuals

Page 3 - connector block has connections for each of the; Caution; Ensure that hazardous voltage wiring is

© National Instruments Corp. 3 cFP-RLY-421 Figure 1. Installing the cFP-RLY-421 Wiring the cFP-RLY-421 The cFP-CB- x connector block has connections for each of the eight cFP-RLY-421 relay channels and for an external supply to power field devices. If you are using the cFP-RLY-421 in a hazardous vol...

Page 4 - terminals are connected internally. NI does not recommend; Cascading power between two modules defeats; Terminal Assignments; Channel; and COM Terminal Assignments; COM

cFP-RLY-421 4 ni.com Table 1 lists the terminal assignments for the signals of each channel. All of the COM terminals are connected internally and all of the V SUP terminals are connected internally. NI does not recommend using them with the cFP-RLY-421. Caution Cascading power between two modules d...

Page 5 - Connecting a Load; between the NO and IC terminals, which; Protecting Contacts for Inductive Loads; Guidelines for Selecting

© National Instruments Corp. 5 cFP-RLY-421 Connecting Loads to the cFP-RLY-421 Wire an external power supply to the load and IC terminal of the individual channel as shown in Figure 2. This method of wiring keeps the electrical connections of the cFP-RLY-421 within safe current limits. Figure 2. Con...

Page 6 - Specifications; Diode and Zener Diode Circuit; Diagram; Use in DC applications only.

cFP-RLY-421 6 ni.com In addition, the cFP-RLY-421 has internal protection MOVs to prevent excessively high voltage from being applied across the contacts. The MOVs are located between the NO and IC contacts of each relay. However, National Instruments still recommends the use of a protection circuit...

Page 7 - Diode Circuit

© National Instruments Corp. 7 cFP-RLY-421 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 values stated in catalog). For larger voltages, use diode with reverse breakdown 10 times circuit voltage an...

Page 8 - Status Indicators; POWER; READY; indicator lights and the module is in normal operating mode.; and; READY; Type of Load

cFP-RLY-421 8 ni.com In-Rush Current The type of load and its in-rush current characteristics, together with switching frequency, can cause contact welding. For loads with in-rush current, measure the steady state current and in-rush current to determine the proper relay. Some typical types of loads...

Page 9 - Upgrading the FieldPoint Firmware; and enter; fpmatrix; Isolation and Safety Guidelines; Read the following information before; double; . Safety standards (such as those published by UL and

© National Instruments Corp. 9 cFP-RLY-421 Upgrading the FieldPoint Firmware You may need to upgrade the FieldPoint firmware when you add new I/O modules to the FieldPoint system. For information on determining which firmware you need and how to upgrade the firmware, go to ni.com/info and enter fpma...

Page 10 - not

cFP-RLY-421 10 ni.com • Do not share the external supply voltages (the V and C terminals) with other devices (including other FieldPoint devices), unless those devices are isolated from human contact. • You must connect the protective earth (PE) ground terminal on the cFP-BP- x backplane to the syst...

Page 11 - Relay Characteristics; Frequency; DC

© National Instruments Corp. 11 cFP-RLY-421 Specifications The following specifications are typical for a range of – 40 to 60 °C unless otherwise noted. Relay Characteristics Number of channels .......................... 8 Relay type ......................................... 1 SPST, nonlatching Maxi...

Page 12 - Physical; Power Requirements; Environmental

cFP-RLY-421 12 ni.com Physical Indicators .......................................... Green POWER and READY indicators, 8 green output state indicators Weight cFP-RLY-421 .............................. 130 g (4.5 oz) Power Requirements Power from network module ............ 1,700 mW Isolation Voltage...

Page 13 - Safety; must; CE Compliance; Note; Declarations of Conformity Information

© National Instruments Corp. 13 cFP-RLY-421 Safety This product is designed to meet the requirements of the following standards of safety for electrical equipment for measurement, control, and laboratory use: • IEC 61010-1, EN 61010-1 • UL 3121-1, UL 61010C-1 • CAN/CSA C22.2 No. 1010.1 For UL, hazar...

Page 14 - Where to Go for Support

cFP-RLY-421 14 ni.com Where to Go for Support For more information about setting up the FieldPoint system, refer to these National Instruments documents: • FieldPoint network module user manual • Other FieldPoint I/O module operating instructions • FieldPoint connector block operating instructions G...