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FieldPoint 

 is a trademark of National Instruments Corporation. Product and company names are 

trademarks or trade names of their respective companies.

321634A-01

©

 Copyright 1997 National Instruments Corp. All rights reserved.

July 1997

FP-AO-200

8 Channel, 20 mA Loop Output Module

Highlights

Eight 0-20/4-20 mA outputs

0.5 mA over-range ability

12-bit resolution DACs 

Open current loop indicators

3,000 V input-to-output isolation

Double insulated for 250 V safe working voltage

Up to 1 kOhm load impedance (with 24 V loop supply)

Short circuit protection

-40° to +70° C operation

Overview

The FP-AO-200 is a FieldPoint analog output module with eight 
0-20/4-20 mA current loop outputs. You can use the FP-AO-200 to 
drive devices using process current loops of either the 0-20 mA or 
4-20 mA standards. Hot plug and play operation, safety isolation, 
onboard diagnostics such as open loop detection, and over-ranging 
ability ensure that installation and maintenance are as trouble free 
as possible. 

These operating instructions describe the installation, features, and 
characteristics of the FP-AO-200. For details on configuring and 
accessing the FP-AO-200 over a network, refer to the user manual 
for the particular FieldPoint network module you are using with the 
FP-AO-200.

FPAO200.fm  Page 1  Thursday, July 31, 1997  8:55 AM

Summary of Contents for FIeldPoint FP-AO-200

Page 1: ...0 to 70 C operation Overview The FP AO 200 is a FieldPoint analog output module with eight 0 20 4 20 mA current loop outputs You can use the FP AO 200 to drive devices using process current loops of either the 0 20 mA or 4 20 mA standards Hot plug and play operation safety isolation onboard diagnostics such as open loop detection and over ranging ability ensure that installation and maintenance ar...

Page 2: ...O 200 in the terminal base The terminal base latch locks the FP AO 200 into place when it is firmly seated 4 Connect a current loop supply for the outputs to the V and C terminals of the terminal base Figure 1 Module Installation Diagram Field Wiring The FP AO 200 sources current from an external loop supply to a load or field device The terminal base provides connections for both the external loo...

Page 3: ...mentary power Figure 2 Basic Field Connections Two channels shown Table 1 lists the terminal assignments for the signals associated with each channel Table 1 Terminal Assignments Channel Terminal Numbers Iout COM Vsup 0 1 2 18 17 1 3 4 20 19 2 5 6 22 21 3 7 8 24 23 4 9 10 26 25 5 11 12 28 27 6 13 14 30 29 7 15 16 32 31 Loop Supply V C Load Iout COM Load Iout COM Loop Supply V Load Iout Load Iout a...

Page 4: ...tects and reports error conditions due to excessive loads or insufficient loop supplies For more information refer to the Open Loop Detection section in this document The FP AO 200 updates the output channels as new values are sent to it by the network module The time it takes to respond to a change on a single channel is between 3 and 6 ms The response time to changes on all eight channels is 24 ...

Page 5: ...nnected However this method or detection also catches errors caused by a load impedance that is too high or a loop supply voltage that is too low to provide the desired output current If the output of the an FP AO 200 channel is set to 0 mA the monitoring circuit does not register an error condition because the FP AO 200 can always source zero current even to an open loop So if any channels are un...

Page 6: ...turns on and the FP AO 200 is in its normal operating mode In addition to the green POWER and READY indicators each channel has a red numbered error status indicator For more information refer to the section on Open Loop Detection in this document Isolation and Safety CAUTION Read the following information before attempting to connect ANY circuits which may contain hazardous voltages to the FP AO ...

Page 7: ...t not between channels on the same module If any of the channels on a module are wired at a hazardous potential ensure that all other devices or circuits connected to that module are properly insulated from human contact Do not share the external loop supply voltages V and C on the terminal base with other devices including other FieldPoint devices unless those devices are also isolated from human...

Page 8: ...ble 0 21 mA or 3 5 21 mA with over range Type Current source external loop power required External Loop Power 5 to 24 VDC Resistive load up to 1 kOhm with 24 V loop supply up to 100 Ohm with 5 V supply Voltage Drop 3 V Protection Short circuit and open circuit Default Power on state 0 mA Accuracy Absolute accuracy 0 2 FSR Monotonicity Guaranteed over temperature Offset temperature coefficient 50 n...

Page 9: ...k Compliance This product meets applicable EU directive s as follows Safety isolation EN 61010 double insulation for 250 Vrms working isolation installation category II EMC Directive Immunity EN 50082 1 1994 Emissions EN 55011 1991 Group I Class A at 10 meters Mechanical Dimensions Figure 5 shows the mechanical dimensions of the FP AO 200 installed onto a terminal base Figure 5 Mechanical Dimensio...

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