National Instruments FieldPoint FP-AI-110, FieldPoint cFP-AI-110 Operating Instructions Manual

National Instruments FP-AI-110 Manual

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FieldPoint™ Operating Instructions

FP-AI-110 and cFP-AI-110

Eight-Channel, 16-Bit Analog Input Modules

These operating instructions describe how to install and use the
FP-AI-110 and cFP-AI-110 analog input modules (referred to
inclusively as the [c]FP-AI-110). For information about
configuring and accessing the [c]FP-AI-110 over a network, refer
to the user manual for the FieldPoint network module you are
using.

Features

The [c]FP-AI-110 is a FieldPoint analog input module with the
following features:

• Eight analog voltage or current input channels

• Eight voltage input ranges: 0–1 V, 0–5 V, 0–10 V, ±60 mV,
±300 mV, ±1V, ±5V, and ±10 V

• Three current input ranges: 0–20, 4–20, and ±20 mA

• 16-bit resolution

• Three filter settings: 50, 60, and 500 Hz

• 250 V
verified by 2,300 V

• –40 to 70 °C operation

• Hot swappable

CAT II continuous channel-to-ground isolation,

rms

dielectric withstand test

rms

Installing the FP-AI-110

The FP-AI-110 mounts on a FieldPoint terminal base (FP-TB-x),
which provides operating power to the module. Installing the
FP-AI-110 onto a powered terminal base does not disrupt the
operation of the FieldPoint bank.

To install the FP-AI-110, 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 1 (used for the FP-AI-110).

2. Align the FP-AI-110 alignment slots with the guide rails on the
terminal base.

3. Press firmly to seat the FP-AI-110 on the terminal base. When
the FP-AI-110 is firmly seated, the latch on the terminal base
locks it into place.

4

5

3

6

1

1 I/O Module
2 Terminal Base
3 Alignment Slot

4Key
5Latch
6 Guide Rails

Figure 1. Installing the FP-AI-110

2

Installing the cFP-AI-110

The cFP-AI-110 mounts on a Compact FieldPoint backplane
(cFP-BP-x), which provides operating power to the module.
Installing the cFP-AI-110 onto a powered backplane does not
disrupt the operation of the FieldPoint bank.

To install the cFP-AI-110, refer to Figure 2 and complete the
following steps:

1. Align the captive screws on the cFP-AI-110 with the holes on
the backplane. The alignment keys on the cFP-AI-110 prevent
backward insertion.

2. Press firmly to seat the cFP-AI-110 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

FP-AI-110 and cFP-AI-110 2 ni.com

(10 lb ⋅ in.) of torque. The nylon coating on the screws prevents
them from loosening.

3 5

2

2

4

4

1

1cFP-DI-300
2Captive Screws
3 cFP Controller Module

Figure 2. Installing the cFP-AI-110

4 Screw Holes
5cFP Backplane

Wiring the [c]FP-AI-110

The FP-TB-x terminal base has connections for each of the eight
input channels and for an external power supply to power field
devices. The cFP-CB-x connector block provides the same
connections. Each channel has separate input terminals for voltage
(V

) and current (IIN) input. Voltage and current inputs are

IN

referenced to the COM terminals, which are internally connected
to each other and to the C terminals. All eight V
internally connected to each other and to the V terminals.

terminals are

SUP

You can use a 10–30 VDC external supply to power field devices.
Connect the external power supply to multiple V and V
terminals so that the maximum current through any V terminal

© National Instruments Corp. 3 FP-AI-110 and cFP-AI-110

SUP

is 2 A or less and the maximum current through any V

terminal

SUP

is 1 A or less.

Install a 2 A maximum, fast-acting fuse between the external
power supply and the V terminal on each channel. 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-x terminal bases and the cFP-CB-x connector blocks.

Table 1. Terminal Assignments

Terminal Numbers

Channel

V

IN

1

2

I

IN

V

0 1 2 17 18

1 3 4 19 20

2 5 6 21 22

3 7 8 23 24

4 9 10 25 26

5 11 12 27 28

6 13 14 29 30

7 15 16 31 32

1

Install a 2 A, fast-acting fuse on each VIN terminal.

2

Install a 2 A, fast-acting fuse on each IIN terminal.

3

Install a 2 A maximum, fast-acting fuse on each V

Caution Do not connect both current and voltage inputs

to the same channel.

SUP

SUP

3

terminal.

COM

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.

FP-AI-110 and cFP-AI-110 4 ni.com

Taking Measurements
with the [c]FP-AI-110

The [c]FP-AI-110 has eight single-ended input channels. All eight
channels share a common ground reference that is isolated from
other modules in the FieldPoint system. Figure 3 shows the analog
input circuitry on one channel.

V

V

SUP

V

I

COM

IN

IN

Filter

16-Bit

Isolated ADC

Filter

C

Figure 3. FP-AI-110 Analog Input Circuit

Measuring Voltage with the [c]FP-AI-110

The input ranges for voltage signals are 0–1 V, 0–5 V, 0–10 V,
±60 mV, ±300 mV, ±1V, ±5 V, and ±10 V.

Figure 4 shows how to connect a voltage source without an
external power supply to one channel of the [c]FP-AI-110.

VC

V

SUP

To Analog

Input Circuitry

>100 MΩ
Input
Impedance

Voltage

Source

V

IN

I

+

–

IN

COM

Figure 4. Voltage Source without External Power Supply

© National Instruments Corp. 5 FP-AI-110 and cFP-AI-110

To Next Channel

[c]FP-AI-110

Figure 5 shows how to connect a voltage source with an external
power supply to one channel of the [c]FP-AI-110.

Powered

Voltage

Transducer

+

OUT

–

1 A

Max

V

SUP

V

I

COM

IN

IN

10–30 VDC

External

Power Supply

(Optional)

To Analog

Input Circuitry

To Next Channel

[c]FP-AI-110

+

–

Figure 5. Voltage Source with External Power Supply

Measuring Current with the [c]FP-AI-110

2 A

Max

VC

The input ranges for current sources are 0–20, 4 –20, and ±20 mA.
The module reads current flowing into the I

terminal as positive

IN

and current flowing out of the terminal as negative. Current flows
into the I

terminal, goes through a 100 Ω resistor, and flows out

IN

from the COM or C terminal.

Figure 6 shows how to connect a current source without an external
power supply to one channel of the [c]FP-AI-110.

FP-AI-110 and cFP-AI-110 6 ni.com