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National Instruments Corp.

11

FP-CTR-502 and cFP-CTR-502

Output Mode

For each output channel select one of the following output modes 
from the Value menu: 

Toggle, Reset Off

Toggle, Reset On

On Pulse

; or 

Off Pulse

. The output modes work only if you select 

Counter Channel 0–7

 for the 

Output Source

. The following 

sections describe the different output modes.

Toggle, Reset Off

In Toggle, Reset Off mode, the output channel starts low and goes 
high when the terminal count is exceeded. The output channel 
returns to low the next time the terminal count is exceeded or when 
you send a reset command to the associated count-input channel. 
In Figure 7, the terminal count is 4.

Figure 7.  

Output of a Channel Set to Toggle, Reset Off Mode

Toggle, Reset On

In Toggle, Reset On mode, the output channel starts high and goes 
low when the terminal count is exceeded. The output channel 
returns to high the next time the terminal count is exceeded or 
when you send a reset command to the associated count-input 
channel. In Figure 8, the terminal count is 4.

Figure 8.  

Output of a Channel Set to Toggle, Reset On Mode

0

1

2

3

4

0

1

2

3

4

0

1

Output

Count

Input

0

1

2

3

4

0

1

2

3

4

0

1

Output

Count

Input

Summary of Contents for FieldPoint FP-CTR-502

Page 1: ...cFP CTR 502...

Page 2: ...erred to inclusively as the c FP CTR 502 For information about configuring and accessing the c FP CTR 502 over a network refer to the user manual for the FieldPoint network module you are using Featur...

Page 3: ...ails on the terminal base 3 Press firmly to seat the FP CTR 502 on the terminal base When the module is firmly seated the terminal base latch locks it into place Figure 1 Installing the FP CTR 502 Ins...

Page 4: ...nts them from loosening Figure 2 Installing the cFP CTR 502 Wiring the c FP CTR 502 The FP TB x terminal base has connections for each FP CTR 502 channel and for an external power supply to power the...

Page 5: ...h channel Install a 1 A maximum fast acting fuse suitable for the load at the VOUT terminal The detailed wiring diagrams in this document show fuses where appropriate Table 1 lists the terminal assign...

Page 6: ...d on between the positive external supply voltage V and VSUP and the input VIN When choosing your external devices and power supply keep in mind that the input logic thresholds are defined by the powe...

Page 7: ...tput Device Outputs Each output channel has one output terminal VOUT Each channel also has VSUP and COM terminals that can supply power to field devices The c FP CTR 502 has sinking outputs which mean...

Page 8: ...l by the external device must not exceed the voltage level of the power supply connected to the c FP CTR 502 Figure 5 Wiring an Output to an Externally Powered Sourcing Input Device Load To next chann...

Page 9: ...the Configuring Output Channels section The count input channel also sends a count trigger to the next count input channel if that channel is set to use the previous channel as the count source Chann...

Page 10: ...low intervals of the gate input signal If you do not associate a gate input channel with the count input channel select Always Disabled or Always Enabled Select Always Enabled if you want the count i...

Page 11: ...able lowpass filter The states of the gate inputs can always be read as simple digital inputs on Channels 8 11 You do not need to configure anything in software for the gate input channels Configuring...

Page 12: ...channel returns to low the next time the terminal count is exceeded or when you send a reset command to the associated count input channel In Figure 7 the terminal count is 4 Figure 7 Output of a Cha...

Page 13: ...he terminal count is 4 Figure 9 Output of a Channel Set to On Pulse Mode Off Pulse In Off Pulse mode the output channel starts high and goes low when the terminal count is exceeded The output channel...

Page 14: ...set up the prescaler counter complete the following steps 1 If you do not need to scale the frequency of your clock input you can configure the pulse counter to use the clock input directly instead of...

Page 15: ...ut fsrc is the count input frequency for the prescaler counter termpre is the terminal count value for the prescaler counter Step 2 Set Up the Pulse Counter To set up the pulse counter complete the fo...

Page 16: ...t the Output Mode of the output channel To generate a pulse train with variable duty cycle use one of the pulse modes On Pulse or Off Pulse To generate a 50 duty cycle pulse train use one of the toggl...

Page 17: ...each channel has a numbered green status indicator that lights when the channel is in the ON state Upgrading the FieldPoint Firmware You may need to upgrade the FieldPoint firmware when you add new I...

Page 18: ...ed beside it Connect the backplane PE ground terminal to the system safety ground using 14 AWG 1 6 mm wire with a ring lug Use the 5 16 in panhead screw shipped with the backplane to secure the ring l...

Page 19: ...xternal supply voltage Typical VSUP 2 5 V Maximum VSUP 2 0 V Minimum VSUP 3 0 V Input current limiting 6 mA Input bandwidth Count inputs 50 kHz 200 Hz with software enabled lowpass filter Gate inputs...

Page 20: ...0 oz cFP CTR 502 113 g 4 0 oz Power Requirements Power from network module 800 mW Isolation Voltage Channel to channel isolation No isolation between channels Transient overvoltage 2 300 Vrms Environ...

Page 21: ...ine 18 shocks at 6 orientations 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 61...

Page 22: ...duct for any additional regulatory compliance information To obtain the DoC for this product click Declarations of Conformity Information at ni com hardref nsf Mechanical Dimensions Figure 13 shows th...

Page 23: ...7 00 20 Brazil 55 11 3262 3599 Canada Calgary 403 274 9391 Canada Montreal 514 288 5722 Canada Ottawa 613 233 5949 Canada Qu bec 514 694 8521 Canada Toronto 905 785 0085 Canada Vancouver 514 685 7530...

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