Allen-Bradley C Series User manual

Installation Instructions
POINT I/O 2 Current and 2 Voltage Input
Analog Modules
Catalog Numbers 1734-IE2C, 1734-IE2CK, 1734-IE2V,
1734-IE2VK, Series C
Catalog numbers with the suffix ‘K’ are conformal coated and their specifications are the
same as non-conformal coated catalogs.
Table of Contents
Topic Page
Important User Information 2
Environment and Enclosure 3
Prevent Electrostatic Discharge 3
North American Hazardous Location Approval 4
European Hazardous Location Approval 5
Before You Begin 7
Install the Mounting Base 9
Install the Module 10
Install the Removable Terminal Block 12
Wire the Module 15
Communicate with the Module 17
Interpret Status Indicators 18
Specifications 20

2POINT I/O 2 Current and 2 Voltage Input Analog Modules
Publication 1734-IN027D-EN-E - December 2018
Important User Information
Solid-state equipment has operational characteristics differing from those of electromechanical
equipment. Safety Guidelines for the Application, Installation, and Maintenance of Solid-State Controls
(Publication SGI-1.1 available from your local Rockwell Automation Sales Office or online at
http://www.rockwellautomation.com/literature/) describes some important differences between
solid-state equipment and hard-wired electromechanical devices. Because of this difference, and also
because of the wide variety of uses for solid-state equipment, all persons responsible for applying this
equipment must satisfy themselves that each intended application of this equipment is acceptable.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages
resulting from the use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the
many variables and requirements associated with any particular installation, Rockwell Automation, Inc.
cannot assume responsibility or liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits,
equipment, or software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell
Automation, Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an
explosion in a hazardous environment, which may lead to personal injury or death,
property damage, or economic loss.
ATTENTION: Identifies information about practices or circumstances that can lead to
personal injury or death, property damage, or economic loss. Attentions help you
identify a hazard, avoid a hazard, and recognize the consequences.
SHOCK HAZARD: Labels may be on or inside the equipment (for example, drive or
motor) to alert people that dangerous voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment (for example, drive or
motor) to alert people that surfaces may reach dangerous temperatures.
IMPORTANT Identifies information that is critical for successful application and understanding of
the product.

POINT I/O 2 Current and 2 Voltage Input Analog Modules 3
Publication 1734-IN027D-EN-E - December 2018
Environment and Enclosure
Prevent Electrostatic Discharge
ATTENTION: This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications (as defined in
EN/IEC 60664-1), at altitudes up to 2000 m (6562 ft) without derating.
This equipment is not intended for use in residential environments and may not
provide adequate protection to radio communication services in such
environments.
This equipment is supplied as open-type equipment for indoor use. It must be
mounted within an enclosure that is suitably designed for those specific
environmental conditions that will be present and appropriately designed to
prevent personal injury resulting from accessibility to live parts. The enclosure
must have suitable flame-retardant properties to prevent or minimize the spread
of flame, complying with a flame spread rating of 5VA or be approved for the
application if nonmetallic. The interior of the enclosure must be accessible only
by the use of a tool. Subsequent sections of this publication may contain more
information regarding specific enclosure type ratings that are required to
comply with certain product safety certifications.
In addition to this publication, see the following:
• Industrial Automation Wiring and Grounding Guidelines, publication
1770-4.1, for more installation requirements.
• NEMA Standard 250 and EN/IEC 60529, as applicable, for explanations of
the degrees of protection provided by enclosures.
ATTENTION: This equipment is sensitive to electrostatic discharge which can
cause internal damage and affect normal operation. Follow these guidelines
when you handle this equipment.
• Touch a grounded object to discharge potential static.
• Wear an approved grounding wriststrap.
• Do not touch connectors or pins on component boards.
• Do not touch circuit components inside the equipment.
• Use a static-safe workstation if available.
• Store the equipment in appropriate static-safe packaging when not in use.

4POINT I/O 2 Current and 2 Voltage Input Analog Modules
Publication 1734-IN027D-EN-E - December 2018
North American Hazardous Location Approval
The following information applies when
operating this equipment in hazardous
locations:
Informations sur l’utilisation de cet équipement
en environnements dangereux:
Products marked "CL I, DIV 2, GP A, B, C, D" are suitable
for use in Class I Division 2 Groups A, B, C, D, Hazardous
Locations and nonhazardous locations only. Each product
is supplied with markings on the rating nameplate
indicating the hazardous location temperature code.
When combining products within a system, the most
adverse temperature code (lowest "T" number) may be
used to help determine the overall temperature code of
the system. Combinations of equipment in your system
are subject to investigation by the local Authority Having
Jurisdiction at the time of installation.
Les produits marqués "CL I, DIV 2, GP A, B, C, D" ne conviennent
qu'à une utilisation en environnements de Classe I Division 2
Groupes A, B, C, D dangereux et non dangereux. Chaque produit
est livré avec des marquages sur sa plaque d'identification qui
indiquent le code de température pour les environnements
dangereux. Lorsque plusieurs produits sont combinés dans un
système, le code de température le plus défavorable (code de
température le plus faible) peut être utilisé pour déterminer le
code de température global du système. Les combinaisons
d'équipements dans le système sont sujettes à inspection par
les autorités locales qualifiées au moment de l'installation.
EXPLOSION HAZARD
• Do not disconnect equipment unless
power has been removed or the area is
known to be nonhazardous.
• Do not disconnect connections to this
equipment unless power has been
removed or the area is known to be
nonhazardous. Secure any external
connections that mate to this equipment
by using screws, sliding latches,
threaded connectors, or other means
provided with this product.
• Substitution of components may impair
suitability for Class I, Division 2.
RISQUE D’EXPLOSION
• Couper le courant ou s'assurer que
l'environnement est classé non dangereux
avant de débrancher l'équipement.
• Couper le courant ou s'assurer que
l'environnement est classé non dangereux
avant de débrancher les connecteurs. Fixer
tous les connecteurs externes reliés à cet
équipement à l'aide de vis, loquets
coulissants, connecteurs filetés ou autres
moyens fournis avec ce produit.
• La substitution de composants peut rendre cet
équipement inadapté à une utilisation en
environnement de Classe I, Division 2.

POINT I/O 2 Current and 2 Voltage Input Analog Modules 5
Publication 1734-IN027D-EN-E - December 2018
European Hazardous Location Approval
The following applies to products marked II 3 G:
• Are intended for use in potentially explosive atmospheres as defined by European
Union Directive 2014/34/EU and has been found to comply with the Essential Health
and Safety Requirements relating to the design and construction of Category 3
equipment intended for use in Zone 2 potentially explosive atmospheres, given in
Annex II to this Directive.
• Compliance with the Essential Health and Safety Requirements has been assured by
compliance with EN 60079-15 and EN 60079-0.
• Are Equipment Group II, Equipment Category 3, and comply with the Essential Health
and Safety Requirements relating to the design and construction of such equipment
given in Annex II to Directive 2014/34/EU. See the EC Declaration of Conformity at
http://www.rockwellautomation.com/global/certification/overview.page for details.
• The type of protection is Ex nA IIC T4 Gc according to EN 60079-15.
• Comply to Standards EN 60079-0:2012+A11:2013, EN 60079-15:2010, reference
certificate number DEMKO 04 ATEX 0330347X.
• Are intended for use in areas in which explosive atmospheres caused by gases,
vapors, mists, or air are unlikely to occur, or are likely to occur only infrequently and
for short periods. Such locations correspond to Zone 2 classification according to
ATEX directive 2014/34/EU.
• May have catalog numbers followed by a “K” to indicate a conformal coating option.
WARNING: Special Conditions for Safe Use:
• This equipment is not resistant to sunlight or other sources of UV radiation.
• This equipment shall be mounted in an ATEX/IECEx Zone 2 certified
enclosure with a minimum ingress protection rating of at least IP54 (in
accordance with EN/IEC 60079-15) and used in an environment of not more
than Pollution Degree 2 (as defined in EN/IEC 60664-1) when applied in
Zone 2 environments. The enclosure must be accessible only by the use of
a tool.
• This equipment shall be used within its specified ratings defined by
Rockwell Automation.
• Provision shall be made to prevent the rated voltage from being exceeded
by transient disturbances of more than 140% of the peak rated voltage
when applied in Zone 2 environments.
• The instructions in the user manual shall be observed.
• This equipment must be used only with ATEX certified Rockwell
Automation backplanes.
• Earthing is accomplished through mounting of modules on rail.
• Devices shall be used in an environment of not more than Pollution
Degree 2.

6POINT I/O 2 Current and 2 Voltage Input Analog Modules
Publication 1734-IN027D-EN-E - December 2018
ATTENTION: If this equipment is used in a manner not specified by the
manufacturer, the protection provided by the equipment may be impaired.
ATTENTION: Read this document and the documents listed in the Additional
Resources section about installation, configuration, and operation of this
equipment before you install, configure, operate, or maintain this product. Users
are required to familiarize themselves with installation and wiring instructions
in addition to requirements of all applicable codes, laws, and standards.
ATTENTION: Installation, adjustments, putting into service, use, assembly,
disassembly, and maintenance are required to be carried out by suitably trained
personnel in accordance with applicable code of practice.
In case of malfunction or damage, no attempts at repair should be made. The
module should be returned to the manufacturer for repair. Do not dismantle
the module.
ATTENTION: This equipment is certified for use only within the surrounding air
temperature range of -20…+55 °C (-4…+131 °F). The equipment must not be
used outside of this range.
ATTENTION: Use only a soft dry anti-static cloth to wipe down equipment. Do
not use any cleaning agents.
WARNING: Secure any external connections that mate to this equipment by
using screws, sliding latches, threaded connectors, or other means provided
with this product.
WARNING: Do not disconnect equipment unless power has been removed or
the area is known to be nonhazardous.
WARNING: The secondary of a current transformer shall not be open-circuited
when applied in Class I, Zone 2 environments.

POINT I/O 2 Current and 2 Voltage Input Analog Modules 7
Publication 1734-IN027D-EN-E - December 2018
Before You Begin
Note that this series C product can be used with the following:
• DeviceNet® and PROFIBUS adapters
• ControlNet® and EtherNet/IP™ adapters, using RSLogix 5000® software, version
11 or later
See the figures to familiarize yourself with major parts of the module, noting that the
wiring base assembly is one of the following:
• 1734-TB or 1734-TBS POINT I/O™ two-piece terminal base, which includes
the 1734-RTB or 1734-RTBS removable terminal block, and 1734-MB
mounting base
• 1734-TOP or 1734-TOPS POINT I/O one-piece terminal base
POINT I/O Module with 1734-TB or 1734-TBS Base
Analog
Voltage
Output
Module
Status
Network
Status
NODE:
0
1
1
10
9
8
7
2
4
5
6
3
43930

8POINT I/O 2 Current and 2 Voltage Input Analog Modules
Publication 1734-IN027D-EN-E - December 2018
POINT I/O Module with 1734-TOP or 1734-TOPS Base
Description Description
1 Module locking mechanism 6 1734-TB or 1734-TBS mounting base
2 Slide-in writable label 7 Interlocking side pieces
3 Insertable I/O module 8 Mechanical keying (orange)
4 Removable terminal block (RTB) handle 9 DIN rail locking screw (orange)
5 Removable terminal block with screw
(1734-RTB) or spring clamp (1734-RTBS) 10 Module wiring diagram
Description Description
1 Module locking mechanism 6 Interlocking side pieces
2 Slide-in writable label 7 Mechanical keying (orange)
3 Insertable I/O module 8 DIN rail locking screw (orange)
4 Removable terminal block (RTB) handle 9 Module wiring diagram
5 One-piece terminal base with screw
(1734-TOP) or spring clamp (1734-TOPS)
1
9
8
7
6
2
4
5
3
46013

POINT I/O 2 Current and 2 Voltage Input Analog Modules 9
Publication 1734-IN027D-EN-E - December 2018
Install the Mounting Base
To install the mounting base on the DIN rail (Allen-Bradley® part number 199-DR1;
46277-3; EN50022), proceed as follows:
1. Position the mounting base vertically above the installed units (adapter, power
supply, or existing module).
ATTENTION: This product is grounded through the DIN rail to chassis ground.
Use zinc plated chromate-passivated steel DIN rail to assure proper grounding.
The use of other DIN rail materials (for example, aluminum or plastic) that can
corrode, oxidize, or are poor conductors, can result in improper or intermittent
grounding. Secure DIN rail to mounting surface approximately every 200 mm
(7.8 in.) and use end-anchors appropriately. Be sure to ground the DIN rail
properly. Refer to Industrial Automation Wiring and Grounding Guidelines,
Rockwell Automation publication 1770-4.1, for more information.
WARNING: When used in a Class I, Division 2, hazardous location, this
equipment must be mounted in a suitable enclosure with proper wiring method
that complies with the governing electrical codes.
46014

10 POINT I/O 2 Current and 2 Voltage Input Analog Modules
Publication 1734-IN027D-EN-E - December 2018
2. Slide the mounting base down allowing the interlocking side pieces to engage the
adjacent module or adapter.
3. Press firmly to seat the mounting base on the DIN rail.
The mounting base snaps into place.
Install the Module
The module can be installed before or after base installation. Make sure that the mounting
base is correctly keyed before installing the module into the mounting base. In addition,
make sure the mounting base locking screw is positioned horizontal referenced to the base.
To install the module, proceed as follows.
1. Use a bladed screwdriver to rotate the keyswitch on the mounting base clockwise
until the number required for the type of module you are installing aligns with
the notch in the base.
2. Verify the DIN rail locking screw is in the horizontal position.
You cannot insert the module if the locking mechanism is unlocked.
WARNING: When you insert or remove the module while backplane power is
on, an electrical arc can occur. This could cause an explosion in hazardous
location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
Repeated electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create electrical
resistance that can affect module operation.

POINT I/O 2 Current and 2 Voltage Input Analog Modules 11
Publication 1734-IN027D-EN-E - December 2018
3. Insert the module straight down into the mounting base and press to secure.
The module locks into place.
Turn the keyswitch to
align the number with
the notch. Notch
position 3 is shown.
Be sure the DIN-rail
locking screw is in the
horizontal position.
1734-TB Base
45696
Turn the keyswitch to
align the number with
the notch. Notch
position 1 is shown.
Be sure the DIN-rail
locking screw is in the
horizontal position.
1734-TOP Base
45697
Module
Status
Network
Status
NODE:
0
1
2
3

12 POINT I/O 2 Current and 2 Voltage Input Analog Modules
Publication 1734-IN027D-EN-E - December 2018
Install the Removable Terminal Block
A Removable Terminal Block (RTB) is supplied with your wiring base assembly. To
remove, pull up on the RTB handle. This allows the mounting base to be removed and
replaced as necessary without removing any of the wiring. To reinsert the Removable
Terminal Block, proceed as follows.
1. Insert the end opposite the handle into the base unit.
This end has a curved section that engages with the wiring base.
2. Rotate the terminal block into the wiring base until it locks itself in place.
3. If an I/O module is installed, snap the RTB handle into place on the module.
WARNING: When you connect or disconnect the Removable Terminal Block
(RTB) with field-side power applied, an electrical arc can occur. This can cause
an explosion in hazardous location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
Module
Status
Network
Status
NODE:
0
1
2
3
Hook the RTB end into the
mounting base end, and
rotate until it locks into place.

POINT I/O 2 Current and 2 Voltage Input Analog Modules 13
Publication 1734-IN027D-EN-E - December 2018
WARNING: For 1734-RTBS and 1734-RTB3S, to latch and unlatch the wire,
insert a bladed screwdriver (catalog number 1492-N90 – 3 mm diameter blade)
into the opening at approximately 73° (blade surface is parallel with top surface
of the opening) and push up gently.
WARNING: For 1734-TOPS and 1734-TOP3S, to latch and unlatch the wire,
insert a bladed screwdriver (catalog number 1492-N90 – 3 mm diameter) into
the opening at approximately 97° (blade surface is parallel with top surface of
the opening) and press in (do not push up or down).
73° 85°
97°

14 POINT I/O 2 Current and 2 Voltage Input Analog Modules
Publication 1734-IN027D-EN-E - December 2018
Remove a Mounting Base
To remove a mounting base, you must remove any installed module and the module
installed in the base to the right. Remove the removable terminal block, if wired.
1. Unlatch the RTB handle on the I/O module.
2. Pull on the RTB handle to remove the removable terminal block.
3. Press the module lock on the top of the module.
4. Pull on the I/O module to remove from the base.
5. Repeat steps 1, 2, 3, and 4 for the module to the right.
6. Use a small-bladed screwdriver to rotate the orange base locking screw to a
vertical position.
This releases the locking mechanism.
7. Lift straight up to remove.
WARNING: When you insert or remove the module while backplane power is
on, an electrical arc can occur. This could cause an explosion in hazardous
location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.
Repeated electrical arcing causes excessive wear to contacts on both the
module and its mating connector. Worn contacts may create electrical
resistance that can affect module operation.
WARNING: When you connect or disconnect the Removable Terminal Block
(RTB) with field side power applied, an electrical arc can occur. This could cause
an explosion in hazardous location installations.
Be sure that power is removed or the area is nonhazardous before proceeding.

POINT I/O 2 Current and 2 Voltage Input Analog Modules 15
Publication 1734-IN027D-EN-E - December 2018
Wire the Module
POINT I/O 2 Current and 2 Voltage Output Analog Modules
WARNING: If you connect or disconnect wiring while the field-side power is
on, an electrical arc can occur. This could cause an explosion in hazardous
location installations. Be sure that power is removed or the area is
nonhazardous before proceeding.
Input 0
Chas gnd
C
Chas gnd
Input 1
41974
C
V
V
Chas gnd = Chassis ground
C = Common
V = Supply
CC
VV
1734
IE2V
Input 0
Chas gnd Chas gnd
Input 1
1734-IE2C, 1734-IE2CK 1734-IE2V, 1734-IE2VK

16 POINT I/O 2 Current and 2 Voltage Input Analog Modules
Publication 1734-IN027D-EN-E - December 2018
POINT I/O 2 Current Input Analog Module Wiring – 1734-IE2C, 1734-IE2CK
POINT I/O 2 Voltage Input Analog Module Wiring – 1734-IE2V, 1734-IE2VK
Channel Current Input Chassis Ground Common Supply
00 2 4 6
11 3 5 7
12/24V DC is provided by the internal field power bus.
Channel Voltage Input Chassis Ground Common Supply
00 2 4 6
11 3 5 7
12/24V DC is provided by the internal field power bus.
In 0
10
32
54
76
In 1
Chas
gnd
CC
VV
4-wire
In = Input channel,
Chas gnd = Chassis ground
C = Common
V = 12/24V DC supply
Note: Not protected, 0.3 A maximum
Chas
gnd
Current
input
device
AC or
DC
2-wire
Current
input
device
In = Input channel,
Chas gnd = Chassis ground
C = Common
V = 12/24V DC supply
Note: Not protected, 0.3 A maximum
In 0
10
32
54
76
In 1
Chas
gnd
CC
VV
Chas
gnd
Voltage
input
Voltage
input

POINT I/O 2 Current and 2 Voltage Input Analog Modules 17
Publication 1734-IN027D-EN-E - December 2018
Communicate with the Module
POINT I/O modules send (produce) and receive (consume) I/O data (messages). You
map this data onto the processor’s memory.
These modules produce 6 bytes of input data (scanner Rx) and fault status data. These
modules do not consume I/O data (scanner Tx).
Default Data Map
Message size: 6 Bytes
15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00
Produces
(scanner Rx) Input channel 0 – high byte Input channel 0 – low byte
Input channel 1 – high byte Input channel 1 – low byte
Status byte for channel 1 Status byte for channel 0
OR UR HHA LLA HA LA CM CF OR UR HHA LLA HA LA CM CF
Consumes
(scanner Tx) No consumed data
Where: OR = Overrange; 0 = No error, 1 = Fault
UR = Underrange; 0 = No error, 1 = Fault
HHA = High/High Alarm; 0 = No error, 1 = Fault
LLA = Low/Low Alarm; 0 = No error, 1 = Fault
HA = High Alarm; 0 = No error, 1 = Fault
LA = Low Alarm; 0 = No error, 1 = Fault
CM = Calibration Mode; 0 = Normal, 1 = Calibration mode
CF = Channel Fault Status; 0 = No error, 1 = Fault

18 POINT I/O 2 Current and 2 Voltage Input Analog Modules
Publication 1734-IN027D-EN-E - December 2018
Interpret Status Indicators
Refer to the following diagram and table for information on how to interpret the
status indicators.
Indicator Status for Modules
Status Description
Module status Off No power applied to device.
Green Device operating normally.
Flashing green Device needs commissioning due to missing, incomplete, or
incorrect configuration.
Flashing red Recoverable fault.
Red Unrecoverable fault occurred. Self-test failure present (checksum
failure, or ramtest failure at cycle power). Firmware fatal error
present.
Flashing red/green Device is in self-test mode.
Module status
Network status
Status of input 0
Status of input 1
41974
Analog
Voltage
Input
Module
Status
Network
Status
NODE:
0
1
1734-IE2C,
1734-IE2CK
1734-IE2V,
1734-IE2VK
Module status
Network status
Status of input 0
Status of input 1

POINT I/O 2 Current and 2 Voltage Input Analog Modules 19
Publication 1734-IN027D-EN-E - December 2018
Network status Off Device is not online:
- Device has not completed dup_MAC-id test.
- Device not powered – check module status indicator.
Flashing green Device is online but has no connections in the established state.
Green Device is online and has connections in the established state.
Flashing red One or more I/O connections are in timed-out state.
Red Critical link failure – failed communication device. Device detected
error that prevents it from communicating on the network.
Flashing red/green Communication faulted device – the device has detected a
network access error and is in communication faulted state. Device
has received and accepted an Identity Communication Faulted
Request – long protocol message.
Channel status Off Module is in CAL mode.
Solid green Normal operation is present with channel scanning inputs.
Flashing green Channel is being calibrated.
Solid red Major channel fault is present.
Flashing red Channel is at end of range (0 mA or 21 mA) for 1734-IE2C,
1734-IE2CK.
Channel is at end of range (over or under) for 1734-IE2V,
1734-IE2VK.
Indicator Status for Modules
Status Description

20 POINT I/O 2 Current and 2 Voltage Input Analog Modules
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Specifications
Input Specifications
Attribute 1734-IE2C, 1734-IE2CK 1734-IE2V, 1734-IE2VK
Number of inputs 2 single-ended, non-isolated,
current 2 single-ended, non-isolated, voltage
Resolution 16 bits – over 0...21 mA
0.32 μA/cnt 15 bits plus sign 320 μA/cnt in unipolar or bipolar
mode
Input current 4...20 mA
0...20 mA –
Input voltage – 0...10V user configurable
(-0.0V under, +0.5V over)
±10V user configurable
(-0.5V under, +0.5V over)
Absolute accuracy(1) 0.1% Full Scale @ 25 °C (77 °F)
Accuracy drift with temp 30 ppm/°C 5 ppm/°C
Input update rate (per module) 120 ms @ Notch = 50 Hz
100 ms @ Notch = 60 Hz (default)
24 ms @ Notch = 250 Hz
12 ms @ Notch = 500 Hz
Input step response (per channel) 80 ms @ Notch = 50 Hz
70 ms @ Notch = 60 Hz (default)
16 ms @ Notch = 250 Hz
8 ms @ Notch = 500 Hz
Digital filter time constant 0...10,000 ms (default = 0 ms)
Input impedance 60 Ω100 kΩ
Input resistance 60 Ω200 kΩ
Conversion type Delta Sigma
Common mode rejection ratio 120 dB
Normal mode rejection ratio -60 dB
Notch filter -3 dB settable at the following:
13.1 Hz @ Notch = 50 Hz
15.7 Hz @ Notch = 60 Hz
65.5 Hz @ Notch = 250 Hz
131 Hz @ Notch = 580 Hz
Data format Signed integer
Maximum overload Fault protected to 28.8V DC
Calibration Factory calibrated