National Instruments FieldPoint FP-DI-330 User manual

FieldPoint™Operating Instructions
FP-DI-330 and cFP-DI-330
Eight-Channel Universal Digital Input Module
These operating instructions describe how to install and use the
National Instruments FP-DI-330 and cFP-DI-330 digital input
modules (referred to inclusively as the [c]FP-DI-330). For
information about configuring and accessing the [c]FP-DI-330
over a network, refer to the user manual for the FieldPoint network
module you are using.
Features
The [c]FP-DI-330 is a FieldPoint digital input module with the
following features:
• Eight digital input channels
• Universal inputs that work with any voltage from 5 V TTL
level up to 250 VDC/VAC
• Compatibility with sourcing, sinking, or power-sensing
applications
• On/Off LED indicators
• 250 Vrms CAT II continuous channel-to-ground isolation,
verified by 2,300 Vrms, 1 minute dielectric withstand test
• –40 to 70 °C operation
• Hot swappable
Installing the FP-DI-330
The FP-DI-330 mounts on a FieldPoint terminal base (FP-TB-x),
which provides operating power to the module. Installing the
FP-DI-330 onto a powered terminal base does not disrupt the
operation of the bank.

FP-DI-330 and cFP-DI-330 2 ni.com
To install the FP-DI-330, refer to Figure 1 and complete the
following steps:
1. Slide the terminal base key to position X.
2. Align the FP-DI-330 alignment slots with the guide rails on the
terminal base.
3. Press firmly to seat the FP-DI-330 on the terminal base. When
the module is firmly seated, the terminal base latch locks it into
place.
Figure 1. Installing the FP-DI-330
Installing the cFP-DI-330
The cFP-DI-330 mounts on a Compact FieldPoint backplane
(cFP-BP-x), which provides operating power to the module.
Installing the cFP-DI-330 onto a powered backplane does not
disrupt the operation of the bank.
To install the cFP-DI-330, refer to Figure 2 and complete the
following steps:
1. Align the captive screws on the cFP-DI-330 with the holes on
the backplane. The alignment keys on the cFP-DI-330 prevent
backward insertion.
2. Press firmly to seat the cFP-DI-330 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
1 I/O Module
2 Terminal Base
3 Alignment Slot
4Key
5 Latch
6 Guide Rails
1
3
2
4
5
6

© National Instruments Corp. 3 FP-DI-330 and cFP-DI-330
(10 lb ⋅in.) of torque. The nylon coating on the screws prevents
them from loosening.
Figure 2. Installing the cFP-DI-330
Wiring the [c]FP-DI-330
The FP-TB-xterminal base has connections for each FP-DI-330
input channel and for an external supply to power field devices.
The cFP-CB-xconnector block provides the same connections
for the cFP-DI-330. You can wire each channel to a switch,
a sourcing-output device, a sinking-output device, or a load.
Each channel has two input terminals, INaand INb; a supply
terminal, VSUP; and a common terminal, COM. All eight COM
terminals are internally connected to each other and to the
C terminals. All eight VSUP terminals are internally connected to
each other and to the V terminals.
1 cFP I/O Module
2 Captive Screws
3 cFP Controller Module
4 Screw Holes
5 cFP Backplane
2
2
1
3 5
4
4

FP-DI-330 and cFP-DI-330 4 ni.com
You can use a 5–250 VDC external power supply to power field
devices. Connect the positive lead of the external power supply to
both V terminals and the negative lead to both C terminals. Ensure
that the current through both V terminals can never exceed 2 A.
Install 2 A maximum, fast-acting fuses between the external power
supply and the V terminals. The wiring diagrams in this document
show fuses where appropriate.
Table 1 lists the terminal assignments for the signals associated
with each channel. The terminal assignments are the same for the
FP-TB-xterminal bases and the cFP-CB-xconnector blocks.
If you are using the cFP-DI-330 in a hazardous voltage
application, you must use the cFP-CB-1 connector block or a
suitable hazardous voltage cable. A hazardous voltage is a voltage
greater than 42.4 Vpeak or 60 VDC.
Caution Ensure that hazardous voltage wiring is
performed only by qualified personnel adhering to local
electrical standards.
Caution Do not mix circuits with hazardous voltages and
human-accessible circuits on the same module.
Caution Cascading power between two modules defeats
isolation between those modules. Cascading power from
the network module defeats all isolation between
modules in the FieldPoint bank.
Table 1. Terminal Assignments
Channel
Terminal Numbers
INaINbVSUP COM
01217 18
13419 20
25621 22
37823 24
4 9 10 25 26
511 12 27 28
613 14 29 30
715 16 31 32

© National Instruments Corp. 5 FP-DI-330 and cFP-DI-330
Connecting Devices to the [c]FP-DI-330
Figure 3 shows how to connect several types of devices to channels
of the [c]FP-DI-330. Devices connected to VSUP and COM share a
common potential.
Figure 3. Connecting Devices to the [c]FP-DI-330
+
–
Sinking-
Output
Device
(NPN)
[c]FP-DI-330
VSUP
COM
VC
Input
Circuitry
INb(Ch 1)
INa(Ch 1)
+
–
Sourcing-
Output
Device
(PNP)
VSUP
COM
Input
Circuitry
INb(Ch 2)
INa(Ch 2)
Sinking-
Output
Device
(NPN)
VSUP
COM
Input
Circuitry
INb(Ch 3)
INa(Ch 3)
Sourcing-
Output
Device
(PNP)
VSUP
COM
Input
Circuitry
INb(Ch 4)
INa(Ch 4)
Switch
VSUP
COM
Input
Circuitry
INb(Ch
n )
INa(Ch
n )
5–250 V
External
Power Supply
+
–
2 A
Max
To Next Channel

FP-DI-330 and cFP-DI-330 6 ni.com
Connecting a Switch to the [c]FP-DI-330
You can connect limit or control switches to the [c]FP-DI-330.
Connect a power supply to the V and C terminals of the
[c]FP-DI-330. Connect the INaand the VSUP terminals to the
switch.
Figure 4. Wiring the [c]FP-DI-330 to a Switch
Connecting a Sourcing-Output Device
to the [c]FP-DI-330
To connect a sourcing-output device to the [c]FP-DI-330, connect
a power supply to the V and C terminals of the [c]FP-DI-330.
Connect the VSUP, INa, INb, and COM terminals to the
sourcing-output device.
Figure 5. Wiring the [c]FP-DI-330 to a Sourcing-Output Device
Switch
[c]FP-DI-330
V
SUP
COM
VC
Input
Circuitry
IN
b
IN
a
5–250 V
External
Power Supply
+
–
2 A
Max
Sourcing-
Output
Device
(PNP)
[c]FP-DI-330
VSUP
COM
VC
Input
Circuitry
INb
INa
5–250 V
External
Power Supply
+
–
2 A
Max

© National Instruments Corp. 7 FP-DI-330 and cFP-DI-330
If the sourcing-output device is connected to a power supply,
connect the power supply to the INbterminal of the [c]FP-DI-330.
Figure 6. Wiring the [c]FP-DI-330 to an Externally Powered
Sourcing-Output Device
Connecting a Sinking-Output Device
to the [c]FP-DI-330
To connect a sinking-output device to the [c]FP-DI-330, connect
a power supply to the V and C terminals of the [c]FP-DI-330.
Connect the VSUP, INa, INb, and COM terminals to the
sinking-output device.
Figure 7. Wiring the [c]FP-DI-330 to a Sinking-Output Device
+
–
Sourcing-
Output
Device
(PNP)
[c]FP-DI-330
VSUP
COM
VC
Input
Circuitry
INb
INa
Sinking-
Output
Device
(NPN)
[c]FP-DI-330
VSUP
COM
VC
Input
Circuitry
INb
INa
5–250 V
External
Power Supply
+
–
2 A
Max

FP-DI-330 and cFP-DI-330 8 ni.com
If the sinking-output device is connected to a power supply,
connect the power supply to the INaterminal of the [c]FP-DI-330.
Figure 8. Wiring the [c]FP-DI-330 to an Externally Powered
Sinking-Output Device
Connecting a Load to the [c]FP-DI-330
If you want to use the [c]FP-DI-330 to sense the power that is
applied to a load, connect the INaand INbterminals to the load.
Figure 9. Wiring the [c]FP-DI-330 to a Load
Universal Input Circuit
The [c]FP-DI-330 has eight current-limited universal input
channels with bi-directional optical isolators. Each channel has
two interchangeable signal inputs, INaand INb. When you apply
a voltage across the INaand INbterminals, signal current flows
through the input circuitry and turns on the optical isolator,
registering as an ON condition. The current-limiting circuitry
limits the amount of current flow to 1.5 mA.
+
–
Sinking-
Output
Device
(NPN)
[c]FP-DI-330
VSUP
COM
VC
Input
Circuitry
INb
INa
Load
[c]FP-DI-330
V
SUP
COM
VC
Input
Circuitry
IN
b
IN
a
+
–

© National Instruments Corp. 9 FP-DI-330 and cFP-DI-330
Figure 10 shows the input circuitry for a single channel.
Figure 10. [c]FP-DI-330 Input Circuit
Sensing DC Voltages
When an external device applies a positive or negative DC voltage
with a magnitude of at least 4 V across the INaand INbterminals,
the [c]FP-DI-330 registers an ON condition. The [c]FP-DI-330
limits the current drawn by the input circuit to approximately
1.5 mA for voltages up to 250 V.
When an external device applies a voltage with a magnitude of less
than 1 V to the INaand INbterminals, the [c]FP-DI-330 registers
an OFF condition. When the external device applies a voltage
between –4 and –1 V or between 1 and 4 V, the [c]FP-DI-330 may
or may not register an ON condition.
Ensure that the devices you connect to the [c]FP-DI-330 have
OFF-state leakage currents lower than 350 µA. Higher leakage
currents can cause false ON readings.
The filter on the [c]FP-DI-330 inputs cause a delay of
approximately 1.2 ms between the time a voltage changes from the
ON state to the OFF state and the time the [c]FP-DI-330 recognizes
the change. The delay for a transition from an OFF to an ON state
is approximately 0.2 µs.
Sensing AC Voltages
The [c]FP-DI-330 senses a wide range of AC signals. The
minimum ON-state voltage for an AC signal depends on the
frequency of the signal. When an external device applies a voltage
between 1 V and the minimum ON-state voltage across the input
terminals, the channel may or may not register an ON condition.
INa
VSUP
COM
INb
V
C
Status
Indicators
Optical
Isolation
[c]FP-DI-330
Current
Limiter AC Smoothing
Filter

FP-DI-330 and cFP-DI-330 10 ni.com
The AC smoothing filter shown in Figure 10 ensures that the
channel remains ON if the signal frequency is higher than 50 Hz
and the signal voltage is higher than the minimum ON state. Refer
to the Specifications section for more information about minimum
ON-state voltages and digital logic levels.
Status Indicators
Figure 11 shows the status indicator LEDs on the [c]FP-DI-330.
Figure 11. Status Indicators
The [c]FP-DI-330 has two green status LEDs, POWER and
READY. After you insert the [c]FP-DI-330 into a terminal base
or backplane and apply power to the connected network module,
the green POWER indicator lights and the [c]FP-DI-330 informs
the network module of its presence. When the network module
recognizes the [c]FP-DI-330, it sends initial configuration
information to the [c]FP-DI-330. After the [c]FP-DI-330 receives
this initial information, the green READY indicator lights and the
module is in normal operating mode.
In addition to the green POWER and READY indicators, each
channel has a numbered green status indicator that lights when the
channel is in the ON state.
Isolation and Safety Guidelines
Caution Read the following information before
attempting to connect the [c]FP-DI-330 to any circuits
that may contain hazardous voltages.
This section describes the isolation of the [c]FP-DI-330 and its
compliance with international safety standards. The field wiring
connections are isolated from the backplane and the inter-module
communication bus. The isolation barriers in the module provide
250 Vrms Installation Category II continuous isolation, verified by
2,300 Vrms, 1 minute dielectric withstand test. The [c]FP-DI-330
provides double insulation (compliant with IEC 61010-1) for