National Instruments FieldPoint FP-DI-301 Operating Instructions Manual
OPERATING INSTRUCTIONS
FP-DI-301
8-Channel, 24 V Discrete Input Module
These operating instructions describe the installation, features, and
characteristics of the FP-DI-301. For details on configuring and
accessing the FP-DI-301 over a network, refer to the user manual
for the particular FieldPoint network module you are using with
the FP-DI-301.
Features
The FP-DI-301 is a FieldPoint discrete input module with the
following features:
• 16 discrete input channels
• Sinking inputs, compatible with 24 VDC sourcing outputs
• 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-DI-301 mounts on a FieldPoint terminal base (FP-TB-xx)
unit. The hot plug and play operation of the FP-DI-301 allows you
to install it onto a powered terminal base without disturbing
the operation of other modules or terminal bases. The FP-DI-301
receives operating po wer from the terminal base.
FieldPoint ™ is a trademark of National Instruments Corporation. Product and company names
mentioned herein are trademarks or trade names of their respective companies.
321700B-01 © Copyright 1997, 1999 National Instruments Corp. All rights reserved. June 1999
To install the FP-DI-301, refer to Figure 1 and follow these steps:
1. Slide the terminal base key to either position X (used for any
module) or position 5 (used for the FP-DI-301 module).
2. Align the FP-DI-301 alignment slots with the guide rails on the
terminal base.
3. Press firmly to seat the FP-DI-301 on the terminal base. The
terminal base latch locks the FP-DI-301 into place when it is
firmly seated.
Key
Latch
Alignment
Slot
Guide Rails
Terminal BaseI/O Module
Figure 1. Module Installation Diagram
Field Wiring
The terminal base provides connections for each of the 16 input
channels and an external supply to power field devices. Each
channel can be wired for use with a sourcing output device.
Figures 2a and 2b show examples of these basic wiring
connections. The connection of an external supply to power field
devices is made to the V and C terminals of the terminal base. Each
channel has one input terminal, V
common terminals, COM (internally connected to the C terminal)
and eight supply terminals, V
V terminal).
. In addition, there are eight
in
(internally connected to the
sup
FP-DI-301 2 www.natinst.com
VC
Input
Circuitry
Input
Circuitry
V
sup
V
in
COM
V
sup
V
in
COM
+
–
C
Input
Circuitry
Input
Circuitry
V
in
V
in
+
–
a. Three-Wire Sourcing Outputs
Powered from FP-DI-301
Figure 2.
Basic Field Connections to Sourcing Output Devices
b. Externally Powered
Sourcing Outputs
Table 1 lists the terminal assignments for the signals associated
with each channel.
Table 1.
Terminal Numbers
Channel
VinV
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
Terminal Assignments
COM VinV
sup
Channel
Terminal Numbers
sup
COM
© National Instruments Corp. 3 FP-DI-301
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