OPERATING INSTRUCTIONS
FP-TB-10
Terminal Base and Dual-channel
FieldPoint Modules
These operating instructions describe the installation, features, and
characteristics of the FP-TB-10 and the various dual-channel
modules. For details on configuring and accessing these modules
over a network, refer to the user manual for the particular
FieldPoint network module you are using with the dual-channel
system.
Features
The FP-TB-10 terminal base and the dual-channel FieldPoint
modules have the following features:
• High granularity of system design with up to six dual-channel
I/O modules per terminal base.
• Any combination of I/O types in each terminal base.
• Each dual-channel I/O module is independently isolated.
FieldPoint dual-channel modules include a family of two-channel
I/O modules for maximum flexibility in configuring I/O systems.
You can mount up to six dual-channel modules in any combination
on the FP-TB-10 terminal base. You can mix dual-channel modules
with standard eight- and 16-channel modules in a single FieldPoint
bank. Therefore, you can configure your FieldPoint system to
match your specific I/O needs very closely, minimizing the size
and cost of your distributed I/O system. In addition, the
dual-channel modules provide a flexible solution for applications
requiring channel-to-channel isolation.
FieldPoint™, National Instruments™, and ni.com™ are trademarks of National Instruments Corporation. Product and
company names m entioned herein are trademarks or trade names of their respective comp anies.
322717B-01 © Copyright 2000 National Instruments Corp. All rights reserved. July 2000
DIN Rail Mounting
Before connecting a terminal base to a network
Note
module, the network module must be powered off.
1. With a flat-bladed screwdriver, open the rail clip to the
unlocked position as shown in the following figure.
2. Hook the lip on the rear of the terminal base onto the top of a
35 mm DIN rail and rotate the terminal base down onto the
DIN rail as shown in the following figure.
Press onto rail
and snap into place
DIN Rail
3. Slide the terminal base along the DIN rail until its local bus
connector mates with the connector of the terminal base or
network module adjacent to it.
4. Lock the terminal base to the DIN rail by pushing in the
rail clip.
5. Continue adding as many terminal bases as you need to the
DIN rail, making sure to mate the local bus connectors.
6. Place the protective cover over the local bus connector of the
last terminal base in the stack. The following figure shows an
installed terminal base.
FP-TB-10 2 www.ni.com
Local Bus Connectors
Firmly Mated
Protective
Cover
Rail Clip
Locked
DIN
Rail
Panel Mounting
1. With a flat-bladed screwdriver, open the rail clip to the
unlocked position.
2. Snap the panel mount accessory onto the terminal base as
shown in the following figure.
Press
3. Lock the rail clip.
4. Mount the FP-TB-10 and panel mount accessory onto the
desired surface. You can drill pilot holes using the directions
in the panel mount adapter installation guide.
You should install the network module first, using two
bolts/screws, then install the FP-TB-10 module(s) using the
right bolt tab. If you use a FieldPoint bus extender cable, the
first FP-TB-10 on the new row should use both panel mount
bolt tabs.
© National Instruments Corp. 3 FP-TB-10
Installation
You can install up to six dual-channel modules on each FP-TB-10
terminal base. You can use any combination of modules in any
order on the terminal base.
To install a dual-channel module on an FP-TB-10, snap the module
onto the terminal base while squeezing the legs of the module
inwards. Install the modules with the colored label oriented
towards the top. Make sure that both legs of the module are
securely snapped into place.
Terminal
Base
I/O Module
To remove a dual-channel module, squeeze the legs of the module
together to unlock, then pull from the terminal base.
Hot Plug-and-Play Live Insertion and Swapping of Modules
You can install modules while the network module is powered and
in operation. Replacing any dual-channel module with another
dual-channel module of the same type will not interrupt the
FieldPoint system’s operation (although during the time a module
is missing, it will be reported as having a bad status). The new
dual-channel module will be automatically configured with the
same settings as the previous module, and if it is an output module,
the output value will be automatically updated. However, if a
module of a different type replaces a removed dual-channel
module, the FP-TB-10 will reset itself and all six of its modules
and will request new initial configuration settings from the network
module.
FP-TB-10 4 www.ni.com
Field Wiring
The terminal base has four screw terminal connections for each of
the six dual-channel modules. These four connections are labeled
“1a” and “1b” for channel 1, and “2a” and “2b” for channel 2.
The signal connections for each of the different I/O modules are
listed in these instructions and are also printed on the sides of each
of the I/O modules. In addition to these terminals are six pairs
of terminals labeled V and C. These V and C terminals are not
directly connected to the dual-channel modules, but all of the V
terminals are connected together and all of the C terminals are
connected together. These terminals may be useful for connecting
terminals of the dual-channel modules to external power supply
voltages, or for bussing power to your field devices. You do not
need to connect anything to these V and C terminals for proper
operation of the dual-channel modules.
Some dual-channel modules may provide for other field wiring
connection means on the modules, as opposed to using the screw
terminal connections of the FP-TB-10. These include the
thermocouple modules and the four-wire RTD module.
Update Rates
The FP-TB-10 continuously scans through its six dual-channel
modules, updating outputs and reading inputs. The rate of this scan
varies depending on the modules in the FP-TB-10. Empty modules
and digital modules add 0.2 ms each to the scan time, while analog
modules add 1.5 ms each. The sum of these six times is the total
scan time. Each I/O module makes its data available to or reads its
data from the network module once per scan time. However, the
network module makes data available to and receives data from the
network at rates that are independent from the operation of the
FP-TB-10 and the dual-channel modules. Refer to you network
module user manual for more details on the operation and
throughput of your particular network.
© National Instruments Corp. 5 FP-TB-10
Power Requirement (P+)
The FP-TB-10 and the dual-channel modules are powered through
the local backplane bus from the FieldPoint network module. An
FP-TB-10 with I/O modules may require more than the nominal
power allocated to an I/O module from the network module. In
some applications, this could limit the number of I/O modules that
you can connect to a single network module. When defining a
FieldPoint system that uses an FP-TB-10, you must calculate the
total power consumption of the FP-TB-10 with its dual-channel
modules, as well as the power consumption of the other I/O
modules in the system. The total power consumption of all these
modules must be less than 9 Watts. The FP-TB-10 alone requires
0.15 Watts of power; add to this the individual power requirements
of the dual-channel modules given in the specifications section.
For example, an FP-TB-10 with three FP-AO-C020 dual-channel
modules and two FP-AI-C020 dual-channel modules requires
4.2 Watts of power (0.15 W + 3 × 1.1 W + 2 × 0.375 W). A bank
of FieldPoint modules including two such FP-TB-10 bases uses
8.4 Watts of power—nearly the entire 9 Watt limit.
Dual-Channel I/O Modules
This section describes the features of the individual dual-channel
I/O modules.
Analog Current Input Modules (FP-AI-C020 and FP-AI-C420)
The FP-AI-C020 and the FP-AI-C420 are current input modules.
They provide 12-bit resolution measurements. Each channel has a
programmable filter with two settings, 20 Hz bandwidth or 100 Hz
bandwidth. Each module has two channels with a 133 Ω input
impedance that share a common reference point (the “b”
terminals). For applications requiring channel-to-channel
isolation, you can use only one channel of each module. Field
devices should be wired such that current flows into the “a”
terminals and returns out through the “b” terminals. The following
figure shows an example of this wiring. You may choose to use the
V and C terminals to conveniently connect loop power supplies for
your current transmitters.
FP-TB-10 6 www.ni.com
FP-AI-Cxxx
Ch. 1
Ch. 2
Current
Sources
1a 1a
1b 1b
2a
2b
FP-AI-Cxxx
Ch. 1
Ch. 2
Loop Powered Transmitters
+
Loop
Supply
-
2a
2b
+
-
Loop
Supply
Analog Voltage Input Modules
(FP-AI-V50m, FP-AI-V100m, FP-AI-V1, FP-AI-V5,
FP-AI-V5B, FP-AI-V10, and FP-AI-V10B)
The FP-AI-V50m, FP-AI-V100m, FP-AI-V1, FP-AI-V5,
FP-AI-V5B, FP-AI-V10, and FP-AI-V10B are analog voltage
input modules. They provide 12-bit resolution measurements.
Each channel has a programmable filter with two settings, 20 Hz
bandwidth or 2 kHz bandwidth. Each module has two channels
that share a common reference point (the “b” terminals). The “a”
terminal for each channel is the positive input. The following figure
shows an example of this wiring. For applications requiring
channel-to-channel isolation, you can use only one channel of each
module.
FP-AI-Vxx
Ch. 1
Ch. 2
Voltage
Sources
1a
+
V
1b
-
2a
+
V
2b
-
© National Instruments Corp. 7 FP-TB-10
Analog Thermocouple Input Modules (FP-TC-J, FP-TC-K, FP-TC-T)
The FP-TC-J, FP-TC-K, and FP-TC-T are J-, K-, and T-type
thermocouple input modules, respectively. They provide 12-bit
resolution measurements. Each channel can be programmed for
either the °C or the °F range. Each module has two thermocouple
connectors directly on the module and do not use the screw
terminals of the FP-TB-10. For applications requiring channelto-channel isolation, you can use only one channel of each module.
RTD Input Modules (FP-RTD-PT100 and FP-RTD-PT100-4)
The FP-RTD-PT100 and FP-RTD-PT100-4 are two-wire and
four-wire 100 Ω Platinum RTD input modules, respectively. They
provide 12-bit resolution measurements. Each is designed with the
linearization curves of a DIN 43760 standard RTD (α = 0.00385).
Each channel can be programmed for either the °C or the °F
range. The FP-RTD-PT100-4 four-wire RTD module has
two four-terminal connectors directly on the module and does not
use the screw terminals of the FP-TB-10. The FP-RTD-PT100 has
two terminals per channel, with the negative terminal (the “b”
terminal) common for the two channels. For applications requiring
channel-to-channel isolation, you can use only one channel of each
module. The following figure shows an example of this wiring for
both module types.
FP-RTD-PT100
Ch. 1
Ch. 2
FP-RTD-PT100-4
2-wire
RTDs
1a
1b
2a
2b
Ch. 1
Ch. 2
4-wire
RTDs
1a
1b
1c
1d
2a
2b
2c
2d
FP-RTD-PT-100-4
top view
b
c
d
a
Ch. 1
b
c
d
a
Ch. 2
FP-TB-10 8 www.ni.com
Analog Current Output Modules (FP-AO-C020, FP-AO-C420, and FP-AO-C024)
The FP-AO-C020, FP-AO-C420, and the FP-AO-C024 are current
output modules. They provide 12-bit resolution outputs. All three
modules provide internal loop power supplies that can drive loads
of up to 500 Ω. The FP-AO-C024 additionally provides open
circuit detection with a status message that is readable from the
network module. Each module has two channels that share a
common reference point (the “a” terminals). For applications
requiring channel-to-channel isolation, you can use only one
channel of each module. Field devices should be wired such that
current flows out of the common “a” terminals and returns in
through the “b” terminals. The following figure shows an example
of this wiring.
FP-AO-Cxxx
Ch. 1
1a
1b
Current
flow
Load
(500Ω max)
2a
Ch. 2
2b
Current
flow
Load
(500Ω max)
Analog Voltage Output Modules
(FP-AO-V5, FP-AO-V5B, FP-AO-V10,
and FP-AO-V10B)
The FP-AO-V5, FP-AO-V5B, FP-AO-V10, and FP-AO-V10B are
analog voltage output modules. They provide 12-bit resolution
outputs. All three modules provide internal power supplies that can
drive loads with up to 10 mA of current; however, each channel has
10 Ω of output impedance, which adds 10 mV of error for each
milliampere that the channel is required to supply. Each module
has two channels that share a common reference point (the “b”
terminals). For applications requiring channel-to-channel
isolation, you can use only one channel of each module.
The following figure shows an example of this wiring.
© National Instruments Corp. 9 FP-TB-10
FP-AO-Vxxx
10Ω
1a
+
Ch. 1
10Ω
Ch. 2
1b
2a
2b
Load
-
(10 mA Max
Per Channel)
+
Load
-
Discrete Input Modules (FP-DI-DC, FP-DI-AC120, and FP-DI-AC240)
The FP-DI-DC, FP-DI-AC120, and FP-DI-AC240 are discrete
input modules. Each module has two isolated channels, so
applications requiring channel-to-channel isolation may use both
channels on one module. Each module has two green indicator
LEDs on the module, one for each channel, to indicate whether the
channel is in the ON or OFF state. Each channel is in the ON state
when a voltage above the threshold is present between the “a” and
“b” terminals. Since each channel of the DC input modules is
isolated, each channel may be used with either sinking or sourcing
devices. The following figure shows examples of this wiring.
You may choose to use the V and C terminals to conveniently
bus-connect power supplies for your discrete output field devices
if channel-to-channel isolation is not needed.
FP-TB-10 10 www.ni.com
FP-DI-DC
Ch. 1
Ch. 2
Sourcing
Device
1a
1b
2a
2b
+
-
+
-
Sinking
Device
FP-DI-ACxxx
Ch. 1
Ch. 2
1a
Load
1b
2a
Load
2b
VAC
25-70
Hz
VAC
25-70
Hz
Discrete Output Modules
(FP-DO-DC60, FP-DO-DC200, FP-DO-AC120,
and FP-DO-AC240)
The FP-DO-DC60, FP-DO-DC200, FP-DO-AC120, and
FP-DO-AC240 are discrete output modules. Each module has
two isolated channels, so applications requiring
channel-to-channel isolation may use both channels on one
module. Each module has two green indicator LEDs on the
module, one for each channel, to indicate whether the channel is
in the ON or OFF state. Each module also has two replaceable
fuses—one for each channel. The amount of current that each
channel can drive without exceeding temperature specifications
depends on the ambient temperature and the module type—see the
Specifications section for more details. Since each channel of the
DC output modules is isolated, each channel may be used with
either sinking or sourcing devices. These modules sink current into
the “a” terminals and source current out of the “b” terminals. The
following figures show examples of this wiring. The AC output
modules have zero-crossing triac style outputs that turn on as the
voltage crosses zero and turn off as the current crosses zero.
You may choose to use the V and C terminals to conveniently
bus-connect power supplies for your loads if channel-to-channel
isolation is not needed.
© National Instruments Corp. 11 FP-TB-10
FP-DO-DCXX
1a
Load
+
Ch. 1
Ch. 2
FP-DO-ACXX
Snubber
Ch. 1
Snubber
Ch. 2
Isolation and Safety
1b
2a
2b
1a
1b
2a
2b
Connected as a
sinking output
Load
Connected as a
sourcing output
Load
Load
-
+
-
VAC
25-70
Hz
VAC
25-70
Hz
Caution
Read the following information before
attempting to connect ANY circuits which may contain
hazardous voltages to the FP-TB-10.
This section describes the isolation of the FP-TB-10 and its
compliance with international safety standards. The field wiring
connections of the FP-TB-10 and the dual-channel modules are
isolated from the backplane provided by the terminal base with
an optical and galvanic isolation barrier designed and tested to
provide protection against fault voltages of up to 2500 Vrms.
FP-TB-10 12 www.ni.com
In addition, the FP-TB-10 and the dual-channel modules provide
double insulation (compliant to IEC 1010-1) 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-TB-10 and the dual-channel modules are) for such an
application. Even when a product like the FP-TB-10 is used in
applications with hazardous potentials, follow these guidelines to
ensure a safe total system.
•The safety isolation of the FP-TB-10 and the dual-channel
modules 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.
•Do not 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-TB-10 and the dual-channel modules is
certified as double insulated for normal operating voltages of
250 Vrms. Do not use the FP-TB-10 and the dual-channel
modules as the sole isolating barrier between human contact
and working voltages of more than 250 Vrms.
© National Instruments Corp. 13 FP-TB-10
Specifications
Analog Input Modules
Number of inputs
Thermocouple modules.............. 2 differential
Other types .................................2 single-ended
Measurement resolution....................12 bits (1 part in 4096)
Input impedance
Voltage inputs.............................2.2 MΩ
Current inputs.............................133 Ω
Excitation current (RTDs)
Four-wire....................................100 µA
Two-wire.....................................500 µA
Measurement bandwidth
Voltage inputs.............................20 Hz or 2 kHz,
Current inputs.............................20 Hz or 100 Hz
Thermocouple inputs..................20 Hz
RTD inputs .................................15 Hz
Input protection
Current inputs.............................45 mA
Voltage inputs.............................±30 V
Thermocouple, RTD ...................±6 V
programmable
Table 1.
Module
FP-AI-V50m 0 to 50 mV 12.2 µV 0.06% 1.8 µV + 75 ppm
FP-AI-V100m 0 to 100 mV 24.4 µV 0.06% 3.5 µV + 75 ppm
FP-AI-V1 0 to 1 V 244 µV 0.05% 35 µV + 75 ppm
FP-AI-V5 0 to 5 V 1.22 mV 0.05% 125 µV + 75 ppm
FP-AI-V5B ±5 V 2.44 mV 0.06% 250 µV + 75 ppm
FP-AI-V10 0 to 10 V 2.44 mV 0.05% 250 µV + 75 ppm
FP-AI-V10B ±10 V 4.88 mV 0.06% 500 µV + 75 ppm
FP-AI-C020 0 to 20 mA 4.9 µA 0.06% 0.5 µA + 75 ppm
FP-AI-C420 0 to 20 mA 3.9 µA 0.06% 0.5 µA + 75 ppm
FP-TB-10 14 www.ni.com
Analog Input Module Accuracy
Input
Range
Resolu-
tion
Accuracy
(at 25°C)
Temperature
Drift*
Table 1.
Module
FP-TC-J –210 to 1200 °C
FP-TC-K –100 to 1372 °C
FP-TC-T –240 to 400 °C
FP-RTD-PT100 –50 to 350 °C
FP-RTD-PT100-4 –50 to 350 °C
* Temperature Drift equals (offset + gain) / °C
Analog Input Module Accuracy (Continued)
Input
Range
–346 to 2192 °F
–148 to 2501 °F
–400 to 752 °F
–58 to 662 °F
–58 to 662 °F
Resolu-
tion
0.34 °C
0.62 °F
0.36 °C
0.65 °F
0.16 °C
0.28 °F
0.1 °C
0.18 °F
0.1 °C
0.18 °F
Accuracy
(at 25°C)
1 °C
1.8 °F
1 °C
1.8 °F
0.4 °C
0.7 °F
0.2 °C
0.4 °F
0.2 °C
0.4 °F
0.07 °C + 100 ppm
0.13 °F + 100 ppm
0.07 °C + 100 ppm
0.13 °F + 100 ppm
0.03 °C + 100 ppm
0.06 °F + 100 ppm
0.03 °C + 100 ppm
0.06 °F + 100 ppm
0.03 °C + 100 ppm
0.06 °F + 100 ppm
Temperature
Drift*
Analog Output Modules
Number of outputs ............................2 single ended
Output resolution.............................. 12 bits (1 part in 4096)
Output impedance
(voltage outputs)...............................10 Ω
Output drive (voltage outputs)..........10 mA
Maximum load (current outputs)...... 500 Ω
Table 2.
Module Output Range Resolution
FP-AO-C020 0 to 20 mA 4.9 µA 0.1% 1 µA + 75 ppm
FP-AO-C420 4 to 20 mA 3.9 µA 0.1% 1 µA + 100 ppm
FP-CO-C024 0 to 24 mA 5.9 mA 0.1% 1.2 µA + 100 ppm
FP-AO-V5 0 to 5 V 1.2 mV 0.08% 125 µV + 100 ppm
FP-AO-V5B ± 5 V 2.4 mV 0.06% 500 µV + 75 ppm
FP-AO-V10 0 to 10 V 2.4 mV 0.06% 250 µV + 100 ppm
FP-AO-V10B ± 10 V 4.9 mV 0.08% 1000 µV + 100 ppm
* Temperature Drift equals (offset + gain) / °C
© National Instruments Corp. 15 FP-TB-10
Analog Output Module Accuracy
Accuracy
(at 25 °C)
Temperature
Drift*
Discrete Input Modules
Number of channels.......................... Two isolated inputs
Table 3.
Nominal input 5 to 24 VDC 120 VAC 240 VAC
Voltage range 0 to 32 VDC 0 to 140
Voltage level
ON state, min
OFF state, max
Current level
ON state, min
OFF state, max
Input impedance 1.8 k
Delay time (max) 0.4 ms 20 ms 20 ms
Discrete Input Characteristics
FP-DI-DC FP-DI-AC120 FP-DI-AC240
0 to 280
VAC/VDC
180 VAC
50 VAC
2.6 mA
1.0 mA
Ω
64 k
3.0 VDC
0.9 VDC
1.0 mA
0.1 mA
Ω
VAC/VDC
90 VAC
25 VAC
3.7 mA
1.0 mA
Ω
22 k
Discrete Output Modules
Number of channels.......................... Two isolated outputs
Replaceable fuses (5x20 mm, 3.15 A, 250 V, fast-acting)
FP-DO-DC .................................Littlefuse 216315
FP-DO-AC..................................Littlefuse 217315
Voltage
range
Voltage
drop
Current
rating
(per
channel)
Max
leakage
Max
output
delay
Table 4.
FP-DO-
DC60
3 to 60 VDC 4 to 200 VDC 24 to 140 VAC
1.3 V @ 0.75 A 1.75 V @ 1.0 A 1.0 V @ 0.5 A 1.0V @ 0.5A
0.75 A@25 °C
0.40 A@40 °C
0.20 A@60 °C
1.5 mA 0.01 mA 2 mA rms 4 mA rms
60 ms 0.75 ms 1/2 cycle 1/2 cycle
Discrete Output Characteristics
FP-DO-
DC200
0.40 A@25 °C
0.20 A@40 °C
0.10 A@60 °C
FP-DO-
AC1 20
25 to 70 Hz
0.75 A@25 °C
0.50 A@40 °C
0.30 A@60 °C
24 to 280 VAC
25 to 70 Hz
0.75 A@25 °C
0.50 A@40 °C
0.30 A@60 °C
FP-DO-
AC240
FP-TB-10 16 www.ni.com
Power Requirements
FP-TB-10 ..........................................150 mW
Analog inputs....................................375 mW
Analog outputs..................................1100 mW
Discrete inputs .................................. 60 mW
Discrete outputs................................ 70 mW
Physical Characteristics
We ig ht
FP-TB-10....................................290 g (10.2 oz)
I/O module..................................60 g (2.1 oz)
Operating temperature
FP-TB-10....................................–40 to +70 °C
Discrete modules........................–40 to +70 °C
Analog modules..........................–20 to +70 °C
Storage temperature..........................–40 to +100 °C
Mechanical Dimensions
The following figure shows the mechanical dimensions of the
FP-TB-10. Dimensions are given in inches [millimeters].
4.34
[110.24]
4.31
[109.5]
4.31
[109.5]
3.67
[93.22]
© National Instruments Corp. 17 FP-TB-10
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