National-instruments FP-RLY-420 Bedienungsanleitung

FieldPoint ™ is a trademark of National Instruments Corporation. Product and company names mentioned herein are trademarks or trade names of their res

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

© National Instruments Corp. 11 FP-RLY-420Maximum switching frequencyMechanical ...20 operations per secondElectrical...

Mechanical DimensionsFigure 6 shows the mechanical dimensions of the FP-RLY-420 installed onto a terminal base. Dimensions are given in inches [millim

FP-RLY-420 2 www.natinst.commodule. The maximum number of terminal bases per bank multiplied by 1 watt is the total power the network module can suppl

© National Instruments Corp. 3 FP-RLY-420Field WiringThe terminal base has connections for each of the eight relay channels and an external supply to

FP-RLY-420 4 www.natinst.comFigures 2a and 2b show examples of basic wiring connections.Figure 2. Basic Field Connection (Two Channels Shown)Relay Ou

© National Instruments Corp. 5 FP-RLY-420Figure 3 shows the diagram of one channel’s relay output circuit.Figure 3. Relay Output CircuitThe maximum s

FP-RLY-420 6 www.natinst.comIn addition, the FP-RLY-420 contains its own internal protection MOV to prevent excessively high voltage from being applie

© National Instruments Corp. 7 FP-RLY-420Diode Circuit CR Circuits Varistor Circuit Diagram NotesUse in DC applications only.Compared to RC type, circ

FP-RLY-420 8 www.natinst.comIn-Rush CurrentThe type of load and its in-rush current characteristics, together with switching frequency, can cause cont

© National Instruments Corp. 9 FP-RLY-420After the module has been inserted into a terminal base (and power is applied), the green POWER indicator lig