National Instruments FieldPoint FP-DO-410 Manual de usuario
FieldPoint ™is a trademark of National Instruments Corporation. Product and company names
mentioned herein are trademarks or trade names of their respective companies.
322301B-01 ©Copyright 1999 National Instruments Corp. All rights reserved. June 1999
OPERATING INSTRUCTIONS
FP-DO-410
8-Channel, 5 to 30 V Protected Discrete
Output Module
These operating instructions describe the installation, features, and
characteristics of the FP-DO-410. For details on configuring and
accessing the FP-DO-410 over a network, refer to the user manual
for the particular FieldPoint network module you are using with
the FP-DO-410.
Features
The FP-DO-410 is a FieldPoint discrete output module with the
following features:
• Eight electronically-fused discrete output channels with status
indicators
• Sourcing outputs supply 1 A per channel
• Compatible with voltages from 5 to 30 VDC
• On/Off LED indicators
• Hot plug and play operation
• 3,000 V input to output isolation
• Double insulated for 250 V safe working voltage
• –40 to +70 °C operation
Installation
The FP-DO-410 mounts on a FieldPoint terminal base (FP-TB-xx)
unit. The hot plug and play operation of the FP-DO-410 allows you
to install it onto a powered terminal base without disturbing the
operation of other modules or terminal bases. The FP-DO-410
receives operating power from the terminal base.
FP-DO-410 2 www.natinst.com
To install the FP-DO-410, refer to Figure 1 and follow these steps:
1. Slide the terminal base key to either position X (used for any
module) or position 4 (used for the FP-DO-410 module).
2. Align the FP-DO-410 alignment slots with the guide rails on
the terminal base.
3. Press firmly to seat the FP-DO-410 on the terminal base. The
terminal base latch locks the FP-DO-410 into place when it is
firmly seated.
Figure 1. Module Installation Diagram
Field Wiring
Theterminalbaseprovidesconnectionsforeach of the eightoutput
channels and an external supply to power field devices. Although
the external supply is not needed for the internal operation of the
FP-DO-410, the outputs source current from this external supply.
You may connect an external supply to power field devices by
connecting to the V and C terminals of the terminal base. Each
channel has one output terminal, Vout; a common terminal, COM
(internally connected to the C terminal); and a supply terminal,
Vsup (internally connected to the V terminal). If the total current
supplied by the channels of the FP-DO-410 is more than 5 A, route
the external supply to the Vsup terminals of individual channels.
Otherwise, the external supply may simply be connected to the
Vand C terminals. Figures 2a and 2b show examples of basic
wiring connections.
Alignment
Slot
Key
Latch
Guide Rails
Terminal BaseI/O Module
© National Instruments Corp. 3 FP-DO-410
Figure 2. Basic Field Connections (Two Channels Shown)
Table 1 lists the terminal assignments for the signals of each
channel.
Discrete Output Circuit
The discrete outputs of the FP-DO-410 consist of optically-
isolated sourcing outputs with overcurrent protection circuitry. In
the ON state, a transistor is turned on between the positive external
supply voltage (the V and Vsup terminals) and the output (Vout)
terminal. In the OFF state, this transistor is turned off, allowing
Table 1. Terminal Assignments
Channel
Terminal Numbers
Vout Vsup COM
0 1 17 2, 18
1 3 19 4, 20
2 5 21 6, 22
3 7 23 8, 24
4 9 25 10, 26
511 27 12, 28
613 29 14, 30
715 31 16, 32
CV Vout
–
+
–
+
COM
a. Total Current Less
Than 5 Amps
Load
Vout
COM Load
CV
Vout
COM
b. Total Current Greater
Than 5 Amps
Load
Vout
Vsup
Vsup
COM
COM
COM
Load
FP-DO-410 4 www.natinst.com
only a small leakage current to flow. Choose the impedance of the
loads driven by the output channels so that the current supplied
by any one channel in the ON state is no more than 1 A, and the
total current supplied by all channels at any one time is no more
than 8 A.
In the ON state, there is an effective resistance of 0.3 Ωbetween
the output (Vout) and the supply voltage (the V and Vsup 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
4.7 V: [5 V – (1 A x 0.3 Ω) = 4.7 V].
Figure 3 shows the diagram of one channel’s discrete output
circuit.
Figure 3. Discrete Output Circuit
Overcurrent Protection
Detect an Overcurrent Condition
Each channel has an overcurrent protection circuit that monitors
the amount of current it sources to the Vout terminal. If this current
exceeds a safe level, which is always at least 1 A, the output
automatically becomes deactivated. If the protection circuitry
disables an output that would otherwise be in the ON state, the
output state indicator for that channel remains lit, but the output
transistoristurned off.Thisconditionalso turns on theadjacent red
overcurrent state indicator and returns an overcurrent status to the
networkmodule.To preventfalsetriggering,higherinrush currents
that exist for only a short time do not trigger the protection
circuitry.
COM
Vout
Vsup
V
C
Optical
Isolation
Load
© National Instruments Corp. 5 FP-DO-410
Reset the Overcurrent Protection Circuit
There are several ways to reset the overcurrent protection circuit,
but first correct the problem that caused the overcurrent protection
circuit to trip. Perform one of the following tasks to reset the
overcurrent protection circuit:
• Remove the load from the FP-DO-410 (theoutput remains on).
• Switch the output to the OFF state.
• Disconnect field power from the module.
• Remove the FP-DO-410 from its terminal base.
• Turn off the network module.
Status Indicators
Figure 4 shows the module label and status indicators. You can
remove the insertable label to see wiring diagrams for the output
channels.
Figure 4. Status Indicators and Module Label
After the module has been inserted into a terminal base (and power
is applied), the green POWER indicator turns on and the
FP-DO-410 informs the network module of its presence. When
the network module recognizes the FP-DO-410, it sends initial
configuration information to the FP-DO-410. After receiving this
initial information, the green READY indicator turns on and the
FP-DO-410 is in its 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 and a red overcurrent state indicator,
which lights when the channel is in overcurrent protection. For
more information, refer to the section on Overcurrent Protection.
FP-DO-410 6 www.natinst.com
Isolation and Safety Guidelines
Caution Read the following information before
attempting to connect any circuits which may contain
hazardous voltages to the FP-DO-410.
This section describes the isolation of the FP-DO-410 and its
compliance with international safety standards. The outputs are
isolated from the backplane provided by the terminal base with an
optical isolation barrier designed and tested to provide protection
against fault voltages of up to 3000 Vrms. In addition, the
FP-DO-410 provides double insulation (compliant to UL and
IEC safety standards) for working common mode voltages of
250 Vrms. 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. You should
never attempt to use any isolation product between human
accessible parts (such as DIN rails or monitoring stations) and
circuits which may be at hazardous potentials under normal
conditions, unless the product is specifically designed (as the
FP-DO-410 is) for such an application.
Even when a product like the FP-DO-410 is used in applications
with hazardous potentials, follow these guidelines to ensure a safe
total system.
• The safety isolation of the FP-DO-410 is from input to output,
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.
•Donot share the external supply voltages (V and C on the
terminal base) with other devices (including other FieldPoint
devices) unless those devices are also isolated from human
contact.
• As with any hazardous voltage wiring, ensure that all wiring
and connections meet with applicable electrical codes or
common sense practices. Mount terminal bases in an area,
position, or cabinet that prevents accidental or unauthorized
access to wiring with hazardous voltages.
• The isolation of the FP-DO-410 is certified as double insulated
for normal operating voltages of 250 Vrms. Do not use the
FP-DO-410 as the sole isolating barrier between human
contact and working voltages of more than 250 Vrms.
© National Instruments Corp. 7 FP-DO-410
Specifications
These specifications are typical for the range –40 to +70 °C unless
otherwise noted.
Input Characteristics
Number of channels..........................8
Output type .......................................Sourcing
Voltage range ....................................5 to 30 VDC
Output impedance.............................0.3 Ω
(0.3 volts drop at 1 A)
Maximum output current..................1 A perchannel, with built-in
overcurrent protection
circuitry
Output delay times
Turn ON......................................20 µs
Turn OFF....................................50 µs
Maximum leakage current
OFF state ....................................50 µA
Overcurrent condition.................1 mA
Isolation ............................................3,000 Vrms
Safety isolation, working voltage .....250 Vrms, designed per IEC
1010 as double insulated
Physical
Indicators ..........................................Green POWER and
READY indicators, 8 green
output state indicators, 8 red
overcurrent state indicators
Weight...............................................140 g (4.8 oz.)
Power Requirements
Power from network module ............400 mW
Environment
Operating temperature......................–40 to +70 °C
Storage temperature..........................–55 to +100 °C
Relative humidity..............................5% to 90% non-condensing
CE Mark 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-DO-410
installed onto a terminal base. Dimensions are given in inches
[millimeters].
Figure 5. Mechanical Dimensions
4.31
[109.5]
3.60 [91.44]
4.22 [107.19]
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