background image

FP-RLY-420

10

www.natinst.com

Do not share the external supply voltages (V and C on the 
terminal base) with other devices (including other FieldPoint 
devices) 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 
common sense practices. Mount terminal bases in an area, 
position, or cabinet that prevents accidental or unauthorized 
access to wiring with hazardous voltages.

The isolation of the FP-RLY-420 is certified as double 
insulated for normal operating voltages of 250 Vrms. Do not 
use the FP-RLY-420 as the sole isolating barrier between 
human contact and working voltages of more than 250 Vrms.

Specifications

The following specifications are typical for the range 
–40 to +70 °C, unless otherwise noted.

Input Characteristics

Number of channels .......................... 8

Relay type ......................................... 1 Form A (SPST) 

Nonlatching

Maximum Switching Capacity (Resistive Load)

AC .............................................. 3 A at 250 VAC
DC .............................................. 3 A at 35 VDC

2 A at 40 VDC
1 A at 55 VDC
0.4 A at 120 VDC

Note

Above 55 °C ambient, max. 1.5 A per channel.

Minimum switching voltage ............. 10 mA at 5 VDC

On resistance..................................... 100 m

Off state leakage ............................... 0.3 µA at 250 VAC

Expected Life

Mechanical ................................. 20 

×

 10

6

 operations min.

Electrical (at 30 cpm) ................. 300,000 operations at 3 A, 

35 VDC
100,000 operations at 3 A, 
250 VAC

Summary of Contents for FP-RLY-420

Page 1: ...output module with the following features Eight Single Pole Single Throw SPST relay channels Switching capacity 3 A at 35 VDC or 250 VAC On Off LED indicators Hot plug and play operation 3 000 V inpu...

Page 2: ...Installation The FP RLY 420 mounts on a FieldPoint terminal base FP TB xx unit The hot plug and play operation of the FP RLY 420 allows you to install it onto a powered terminal base without disturbi...

Page 3: ...ternal operation of the FP RLY 420 however you may connect an external supply to power field devices by connecting to the V and C terminals of the terminal base If you connect an external supply to th...

Page 4: ...contacts connect together to form a short circuit Choose the impedance of the loads so that the current switched by any one channel in the ON state is no more than 3 A In the ON state there is an eff...

Page 5: ...nter electromotive force may occur at relay switching time because of the energy stored in the inductive load These flyback voltages can severely damage the relay contacts and greatly shorten the life...

Page 6: ...the protection device always locate it near the immediate area of the load or contact Typically you should mount a protective device within 18 in of the load or contact Typically contact protection ci...

Page 7: ...otes Circuit A is suitable for AC or DC applications but if used with AC voltage impedance of the load should be smaller than the CR circuit s Do not utilize for timer loads as leakage current can cau...

Page 8: ...abel and status indicators You can remove the insertable label to see wiring diagrams for the input channels Figure 5 Status Indicators and Module Label Type of Load In Rush Current Resistive load Ste...

Page 9: ...ne of the terminal base with an isolation barrier designed and tested to protect against fault voltages of up to 3000 Vrms In addition the FP RLY 420 provides double insulation compliant to UL and IEC...

Page 10: ...ed for normal operating voltages of 250 Vrms Do not use the FP RLY 420 as the sole isolating barrier between human contact and working voltages of more than 250 Vrms Specifications The following speci...

Page 11: ...only 250 Vrms designed per IEC 1010 as double insulated Physical Indicators Green POWER and READY indicators 8 green output state indicators Weight 160 g 5 6 oz Power Requirements Power from network...

Page 12: ...Dimensions Figure 6 shows the mechanical dimensions of the FP RLY 420 installed onto a terminal base Dimensions are given in inches millimeters Figure 6 Mechanical Dimensions 4 31 109 5 3 60 91 44 4...

Reviews: