National Instruments FP-CTR-502, CFP-CTR-502 User Manual
FieldPoint Operating Instructions
FP-CTR-502 and
cFP-CTR-502
Eight-Channel, 16-Bit Counter Module
These operating instructions describe how to install and use the
National Instruments FP-CTR-502 and cFP-CTR-502 counter
modules (referred 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.
Features
The [c]FP-CTR-502 is a FieldPoint counter module with the
following features:
• Eight 16-bit counters with individual count-input terminals
• Four gate-input channels configurable as either gates or digital
inputs
• Four output channels configurable as either generic digital
outputs or associated outputs for the count-input channels
• 5–30 VDC sourcing inputs and sinking outputs, compatible
with TTL devices and other 5, 12, and 24 VDC devices
• Internal frequency references of 1 kHz and 32 kHz
• Internally cascadable counters
• Software-enabled 50 kHz or 200 Hz lowpass filter on
count-input channels
• On/Off LED indicators
• 2,300 V
• Hot swappable
transient overvoltage protection
rms
FieldPoint™, National Instruments™, NI™, and ni.com™ are trademarks of National Instruments Corporation.
Product and company names mentioned herein are trademarks or trade names of their respective companies.
For patents covering National Instruments products, refer to the appropriate location: Help»Patents in your software,
the
patents.txt file on your CD, or ni.com/patents.
323324B-01 June 2003
© 2002–2003 National Instruments Corp. All rights reserved.
Installing the FP-CTR-502
The FP-CTR-502 mounts on a FieldPoint terminal base (FP-TB-x),
which provides operating power to the module. Installing the
FP-CTR-502 onto a powered terminal base does not disrupt the
operation of the FieldPoint bank.
To install the FP-CTR-502, refer to Figure 1 and complete the
following steps:
1. Slide the terminal base key to either position X, used for any
module, or position 8, used for the FP-CTR-502 module.
2. Align the FP-CTR-502 alignment slots with the guide rails 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.
Key
Latch
Alignment
Slot
Guide Rails
Terminal BaseI/O Module
Figure 1. Installing the FP-CTR-502
Installing the cFP-CTR-502
The cFP-CTR-502 mounts on a Compact FieldPoint backplane
(cFP-BP-x), which provides operating power to the module.
Installing the cFP-CTR-502 onto a powered backplane does not
disrupt the operation of the FieldPoint bank.
To install the cFP-CTR-502, refer to Figure 2 and complete the
following steps:
1. Align the captive screws on the cFP-CTR-502 with the holes
on the backplane. The alignment keys on the cFP-CTR-502
prevent backward insertion.
FP-CTR-502 and cFP-CTR-502 2 ni.com
2. Press firmly to seat the cFP-CTR-502 on the backplane.
3. Using a number 2 Phillips screwdriver with a shank of at least
64 mm (2.5 in.) length, tighten the captive screws to 1.1 N ⋅ m
(10 lb ⋅ in.) of torque. The nylon coating on the screws prevents
them from loosening.
3 5
2
2
1
1 cFP I/O Module
2 Captive Screws
3 cFP Controller
Figure 2. Installing the cFP-CTR-502
4
4
4 Screw Holes
5 cFP Backplane
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 input
channels and field devices. The cFP-CB-x connector block
provides the same connections for the cFP-CTR-502. The V and
V
terminals are all internally connected, as are the C and COM
SUP
terminals.
© National Instruments Corp. 3 FP-CTR-502 and cFP-CTR-502
Use a 5–30 VDC external power supply for the input channels.
The power supply must provide enough current to power all of the
input channels and all of the field devices on the output channels.
Connect the external power supply to multiple V and V
SUP
terminals and to multiple C and COM terminals as needed to
ensure that the maximum current through any terminal is 2 A
or less.
Install a 2 A maximum, fast-acting fuse between the external
power supply and the V or V
a 1 A maximum, fast-acting fuse suitable for the load at the V
terminal on each channel. Install
SUP
OUT
terminal. The detailed wiring diagrams in this document show
fuses where appropriate.
Table 1 lists the terminal assignments for the signals of each
channel. Terminal assignments are also listed on the side panel of
the cFP-CTR-502 and under the slide-in card on the front of the
FP-CTR-502.
Table 1. Terminal Assignments
Ter m i n a l Nu m b e rs
Channel Name
Count Input 0 1 17 18
Count Input 1 2 17 18
Count Input 2 3 19 20
Count Input 3 4 19 20
Count Input 4 5 21 22
Count Input 5 6 21 22
Count Input 6 7 23 24
Count Input 7 8 23 24
Gate 0 9 25 26
Gate 1 10 25 26
Gate 2 11 27 28
Gate 3 12 27 28
VIN or V
1
OUT
Count Inputs
Gate Inputs
2
V
SUP
COM
FP-CTR-502 and cFP-CTR-502 4 ni.com
Table 1. Terminal Assignments (Continued)
Ter m i n a l Nu m b e rs
Channel Name
Output 0 13 29 30
Output 1 14 29 30
Output 2 15 31 32
Output 3 16 31 32
1
Install a 1 A maximum, fast-acting fuse on each V
2
Install a 2 A maximum, fast-acting fuse on each V and V
VIN or V
1
OUT
Outputs
2
V
SUP
OUT
COM
terminal.
terminal.
SUP
Inputs
Each input channel has one input terminal, VIN. Each channel also
has V
devices or provide additional connections to the external power
supply. You can connect the eight count-input channels and four
gate-input channels to devices with sinking outputs. The
[c]FP-CTR-502 has sourcing inputs, which means that the V
terminal provides a path to a voltage supply.
The [c]FP-CTR-502 input channels are optically isolated from
the rest of the FieldPoint bank and have current-limiting circuitry.
All the input channels are referenced to the V and V
In the ON state, an optoisolator is turned on between the positive
external supply voltage (V and V
When choosing your external devices and power supply, keep in
mind that the input-logic thresholds are defined by the power
supply as detailed in the Specifications section.
where V
When V
the channel is ON. Therefore, if you connect a 24 V power supply
to the [c]FP-CTR-502, an input channel registers an ON state when
and COM terminals that can supply power to field
SUP
) and the input (VIN).
SUP
V
is the threshold voltage for the channel
threshold
is the supply voltage, measured across V
V
SUP
and COM
has a value of 2–3 V
V
K
, the voltage across VIN and COM, is lower than V
IN
threshold
= V
SUP
– V
K
terminals.
SUP
SUP
IN
threshold
,
© National Instruments Corp. 5 FP-CTR-502 and cFP-CTR-502
VIN is 21 V or lower, and an OFF state when VIN is 22 V or higher.
The channel state is indeterminate when V
and22V.
is between 21 V
IN
Ensure that the sinking-output devices have OFF state leakage
currents of less than 0.3 mA so they do not send false ON state
readings to the [c]FP-CTR-502.
Note Yo u must use the same ground for all of the input
and output channels on the [c]FP-CTR-502.
+–
5–30 VDC
External
2 A max
Power
Supply
VC
To next channel
Sinking-
Output
Device
V
SUP
V
COM
IN
Sourcing-
Input
Circuitry
[c]FP-CTR-502
Figure 3. Wiring a Count-Input or Gate-Input Channel to a
Sinking-Output Device
Outputs
Each output channel has one output terminal, V
also has V
and COM terminals that can supply power to field
SUP
devices.
The [c]FP-CTR-502 has sinking outputs, which means that V
provides a path to ground. You can connect the [c]FP-CTR-502
outputs to sourcing-input devices.
In the ON state, a transistor is turned on between the output (V
and common (C and COM). In the OFF state, this transistor is
turned off, allowing only a small leakage current to flow. Ensure
that the load on any output channel does not draw more than 1 A.
. Each channel
OUT
OUT
OUT
)
FP-CTR-502 and cFP-CTR-502 6 ni.com
2 A max
+–
5–30 VDC
External
Power Supply
VC
Sinking-
Output
Circuitry
To next channel
[c]FP-CTR-502
V
SUP
V
OUT
COM
1 A max
Load
Figure 4. Wiring an Output Channel to a Sourcing-Input Device
If you connect a [c]FP-CTR-502 output to an externally powered
sourcing-input device, be aware that the voltage applied to the
V
terminal by the external device must not exceed the voltage
OUT
level of the power supply connected to the [c]FP-CTR-502.
V
SUP
+
V
To next channel
[c]FP-CTR-502
5–30 VDC
–
Power Supply
C
Sinking-
Output
Circuitry
External
V
SUP
V
OUT
COM
1 A max
Load
≤
V
SUP
External
Power Supply
+
–
Figure 5. Wiring an Output to an Externally Powered Sourcing-Input Device
© National Instruments Corp. 7 FP-CTR-502 and cFP-CTR-502
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