National Instruments FIELDPOINT cFP-DO-403 User manual

FIELDPOINT™OPERATING INSTRUCTIONS
AND SPECIFICATIONS
FP-DO-403 and cFP-DO-403
16-Channel, 5 to 30 V Sinking Digital Output Module
These operating instructions describe how to install and use the
National Instruments FP-DO-403 and cFP-DO-403 digital output
modules, referred to inclusively as the [c]FP-DO-403. For
information about configuring and accessing the [c]FP-DO-403
over a network, refer to the user manual for the FieldPoint network
module you are using.
Features
The [c]FP-DO-403 is a FieldPoint digital output module with the
following features:
• 16 sinking digital output channels
• Outputs that sink 2 A per channel, 16 A2per module
• Compatible with voltages from 5 to 30 VDC
• 250 Vrms CAT II continuous channel-to-ground isolation,
verified by 2,300 Vrms, 5 s dielectric withstand test
• –40 to 70 °C operation
• ON/OFF LED indicators
• Hot swappable
Installing the FP-DO-403
The FP-DO-403 mounts on a FieldPoint terminal base (FP-TB-x),
which provides operating power to the module. Installing the
FP-DO-403 onto a powered terminal base does not disrupt the
operation of the bank.
To install the FP-DO-403, 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 6, used for the FP-DO-403 module.

[c]FP-DO-403 2 ni.com
2. Align the FP-DO-403 alignment slots with the guide rails on
the terminal base.
3. Press firmly to seat the FP-DO-403 on the terminal base. When
the module is firmly seated, the terminal base latch locks it into
place.
Figure 1. Installing the FP-DO-403
Installing the cFP-DO-403
The cFP-DO-403 mounts on a Compact FieldPoint backplane
(cFP-BP-x), which provides operating power to the module.
Installing the cFP-DO-403 onto a powered backplane does not
disrupt the operation of the bank.
To install the cFP-DO-403, refer to Figure 2 and complete the
following steps:
1. Align the captive screws on the cFP-DO-403 with the screw
holes on the backplane. The alignment keys on the
cFP-DO-403 prevent backward insertion.
2. Press firmly to seat the cFP-DO-403 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.
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 [c]FP-DO-403
Figure 2. Installing the cFP-DO-403
Wiring the [c]FP-DO-403
The FP-TB-xterminal base has connections for each FP-DO-403
output channel and for an external supply to power field devices.
The cFP-CB-xconnector block provides the same connections for
the cFP-DO-403.
Each channel has one output terminal, VOUT. The output channels
share eight VSUP terminals and eight COM terminals. All of the
channels are referenced to the COM terminals. The V and VSUP
terminals are all internally connected, as are the C and COM
terminals.
Use a 5–30 VDC external power supply for the output channels.
The power supply must provide enough current to power all of the
1 cFP I/O Module
2 Captive Screws
3 cFP Controller Module
4 Screw Holes
5 cFP Backplane
2
2
1
35
4
4

[c]FP-DO-403 4 ni.com
loads on the output channels, up to 2 A per channel.1Connect
the external power supply to multiple V and VSUP 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 (F2A 250V) between the
external power supply and the VSUP terminal on each channel.
Install a 2 A maximum, fast-acting fuse suitable for the load at the
VOUT terminal. Figure 3 shows fuses where appropriate.
Table 1 lists the terminal assignments for the signals associated
with each channel. Terminal assignments and wiring diagrams are
also listed on the side panel of the cFP-DO-403 and under the
slide-in card on the front of the FP-DO-403 module.
National Instruments recommends that you wire the external
power supply to multiple VSUP and COM terminals. Figure 3
shows how to connect two output channels to loads.
Wiring for Low-Current Applications
If your application requires 2 A or less combined current through
all channels of the [c]FP-DO-403, you can wire your application
as shown in Figure 3. Install a 2 A maximum, fast-acting fuse
(F2A 250V) between the external power supply and the V terminal
as shown.
1 Refer to the Digital Output Circuit and Specifications sections for the maximum
output current level on all channels.
Table 1. Terminal Assignments
Channel
Terminal Numbers
Channel
Terminal Numbers
VOUT VSUP COM VOUT VSUP COM
0 1 17 18 8 9 25 26
1 2 17 18 9 10 25 26
2 3 19 20 10 11 27 28
3 4 19 20 11 12 27 28
4 5 21 22 12 13 29 30
5 6 21 22 13 14 29 30
6 7 23 24 14 15 31 32
7 8 23 24 15 16 31 32

© National Instruments Corp. 5 [c]FP-DO-403
Figure 3. Wiring for Low-Current Applications
Wiring for High-Current Applications
If your application requires more than 2 A combined current
through all channels of the [c]FP-DO-403, wire your application
as shown in Figure 4. Install a 2 A maximum, fast-acting fuse
(F2A 250V) in series with each load as shown.
Figure 4. Wiring for High-Current Applications
COM
VOUT
V
C
[c]FP-DO-403
Load –
+
5–30 VDC
External Power
Supply
VSUP
VOUT
2 A Max
User-Supplied
Fuse
Load
COM
VOUT
V
C
[c]FP-DO-403
Load
–
+
5–30 VDC
External Power
Supply
VSUP
VOUT
2 A Max
User-Supplied
Fuse
Load
2 A Max
User-Supplied
Fuse
2 A Max
User-Supplied
Fuse

[c]FP-DO-403 6 ni.com
Digital Output Circuit
The [c]FP-DO-403 digital output channels are optically isolated
from the rest of the FieldPoint bank. In the ON state, a transistor is
turned on between the VOUT terminal and the external supply (the
C and COM terminals). In the OFF state, this transistor is turned
off, allowing only a small leakage current to flow. The VOUT
terminal sinks current from external devices. Sinking current
means the VOUT terminal provides a path to the supply common.
Ensure that no channel sinks more than 2 A, and that the total
current supplied by all channels at any time is no more than 16 A2.
To determine whether the total current is within the limit, square
the current on each channel and add the squares together. If the sum
of all the squares is less than or equal to 16 A2, the total current is
within the limit. In the following example, three channels sink 2 A
and four channels sink 1 A each:
(2 A)2+ (2 A)2+ (2 A)2+ (1 A)2
+ (1 A)2+ (1 A)2+ (1 A)2≤ 16 A2
Caution The outputs must not be short-circuited to the
potential of the V or VSUP terminals (the positive voltage
of the external supply). Short circuits damage the
[c]FP-DO-403 output channels. Check all wiring
carefully before applying power.
In the ON state, there is an effective resistance of 0.12 Ωbetween
the output (VOUT) and the supply voltage (the C and COM
terminals). This resistance causes a voltage drop between the
external supply voltage and the output voltage. For example,
if the external supply voltage is 5 V and the output current is 1 A,
the output voltage is 4.88 V:
5 V – 1 A ×0.12 Ω= 4.88 V
Protection for Inductive Loads
When an inductive load, such as a motor or relay, is connected to
an output, a large counter-electromotive force may occur at
switching time because of the energy stored in the inductive load.
This flyback voltage can damage the outputs and the power supply.
It is best to limit such flyback voltages at the inductive load by
installing a flyback diode across the load. Typically, you should

© National Instruments Corp. 7 [c]FP-DO-403
mount the flyback diode within 18 in. of the load. Figure 5 shows
a flyback diode connected to an inductive load.
Figure 5. Connection to Inductive Load with Flyback Diode
Although the [c]FP-DO-403 contains flyback diodes to prevent
excessively high voltage from damaging the module, National
Instruments recommends the use of an external protection circuit
across any inductive load.
Status Indicators
The [c]FP-DO-403 has two green status LEDs, POWER and
READY. After you insert the FP-DO-403 into a terminal base
or the cFP-DO-403 into a backplane and apply power to the
connected network module, the green POWER indicator lights
and the [c]FP-DO-403 informs the network module of its presence.
When the network module recognizes the [c]FP-DO-403, it sends
initial configuration information to the [c]FP-DO-403. After the
module receives this initial information, the green READY
indicator lights and the [c]FP-DO-403 is in normal operating
mode.
In addition to the green POWER and READY indicators, each
channel has a numbered, green output state indicator, which 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-DO-403 to any circuits
that may contain hazardous voltages.
This section describes the isolation of the [c]FP-DO-403 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
Flyback Diode
VOUT Load
V or VSUP

[c]FP-DO-403 8 ni.com
250 Vrms Measurement Category II continuous isolation, verified
by 2,300 Vrms, 5 s dielectric withstand test. The [c]FP-DO-403
provides double insulation (compliant with IEC 61010-1) for
working voltages of 250 Vrms1. Safety standards (such as those
published by UL and IEC) require the use of double insulation
between hazardous voltages and any human-accessible parts or
circuits.
Never try to use any isolation product between human-accessible
parts (such as DIN rails or monitoring stations) and circuits that
can be at hazardous potentials under normal conditions, unless the
product is specifically designed for such an application, as is the
[c]FP-DO-403.
Even though the [c]FP-DO-403 is designed to handle applications
with hazardous potentials, follow these guidelines to ensure a safe
total system:
• There is no isolation between channels on the [c]FP-DO-403.
If a hazardous voltage is present on any channel, all channels
are considered hazardous. Make sure that all other devices and
circuits connected to the module are properly insulated from
human contact.
•Donot share the external supply voltages (the V and C
terminals) with other devices (including other FieldPoint
devices), unless those devices are isolated from human contact.
• For Compact FieldPoint, you must connect the protective earth
(PE) ground terminal on the cFP-BP-xbackplane to the system
safety ground. The backplane PE ground terminal has the
following symbol stamped 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
lug to the backplane PE ground terminal.
• As with any hazardous voltage wiring, make sure that all
wiring and connections meet applicable electrical codes and
commonsense practices. Mount terminal bases and backplanes
in an area, position, or cabinet that prevents accidental or
unauthorized access to wiring that carries hazardous voltages.
1 Working voltage is defined as the signal voltage plus the common-mode voltage.
Common-mode voltage is the voltage of the module with respect to ground.

© National Instruments Corp. 9 [c]FP-DO-403
•Donot use the [c]FP-DO-403 as the only isolating barrier
between human contact and working voltages higher than
250 Vrms .
• Operate the [c]FP-DO-403 only at or below Pollution
Degree 2. Pollution Degree 2 means that only nonconductive
pollution occurs in most cases. Occasionally, however, a
temporary conductivity caused by condensation must be
expected.
• Operate the [c]FP-DO-403 at or below Measurement
Category II. Measurement Category II is for measurements
performed on circuits directly connected to the low-voltage
installation. This category refers to local-level distribution,
such as that provided by a standard wall outlet.
Safety Guidelines for Hazardous Locations
The [c]FP-DO-403 is suitable for use in Class I, Division 2, Groups
A, B, C, D, T4 hazardous locations; Class I, Zone 2, AEx nA IIC
T4 and Ex nA IIC T4 hazardous locations; and nonhazardous
locations only. Follow these guidelines if you are installing the
[c]FP-DO-403 in a potentially explosive environment. Failing to
follow these guidelines may result in serious injury or death.
Caution Make sure that all products you use in hazardous
locations are certified for such use. Refer to the product
label or visit ni.com/certification, search by model
number or product line, and click the appropriate link in
the Certification column.
Caution Do not disconnect I/O-side wires or connectors
unless power has been switched off or the area is known
to be nonhazardous.
Caution Do not remove modules unless power has been
switched off or the area is known to be nonhazardous.
Caution Substitution of components may impair
suitability for Class I, Division 2.
Caution For Zone 2 applications, install the FieldPoint
system in an enclosure rated to at least IP 54 as defined
by IEC 60529 and EN 60529.

[c]FP-DO-403 10 ni.com
Caution For Zone 2 applications, install a protection
device across the external power supply and the COM
terminal. The device must prevent the external power
supply voltage from exceeding 42 V if there is a transient
overvoltage condition.
Special Conditions for Hazardous Locations Use in Europe
The [c]FP-DO-403 has been evaluated as EEx nC IIC T4
equipment under DEMKO Certificate No. 03 ATEX 0251502X.
Each module is marked II 3G and is suitable for use in Zone 2
hazardous locations.
Specifications
These specifications are typical for –40 to 70 °C unless otherwise
noted. Specifications are subject to change without notice.
Output Characteristics
Number of channels .......................... 16
Output type ....................................... Sinking
Voltage range .................................... 5 to 30 VDC
Output impedance ............................. 0.12 Ω
(0.12 V drop at 1 A)
Maximum current
Per channel ................................. 2 A
All channels
FP-DO-403........................... 16 A2
cFP-DO-403......................... 16 A2at–40to60°C
12 A2at 60 to 70 °C
Maximum OFF state leakage............ 50 μA
Output delay time ............................. 50 μs
Physical Characteristics
Indicators .......................................... Green POWER and
READY indicators, 16 green
output state indicators
Weight
FP-DO-403 ................................. 140 g (4.8 oz)
cFP-DO-403 ............................... 110 g (3.7 oz)