Use this document as a guide when installing the 1771-IFF series A fast analog
input module.
ToSee page
Important User Information1
North American Hazardous Location Approval4
Understand Product Compatibilty5
Calculate Power Requirements6
Determine Module Placement in the I/O Chassis6
Set the Simulation Jumper7
Set the Configuration Jumpers7
Key the Backplane Connector8
Install the Module and Field Wiring Arm8
Connect Wiring to the Field Wiring Arm9
Grounding13
Configure the Module14
Interpret Status Indicators16
Troubleshooting17
Specifications18
Important User Information
1Publication 1771-IN046B-EN-P - December 2003
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.ab.com/manuals/gi)
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.
2 Fast Analog Input Module
Reproduction of the contents of this manual, in whole or in part, without written
permission of Rockwell Automation, Inc. is prohibited.
Throughout this manual we use notes to make you aware of safety considerations.
WARNING
IMPORTANT
ATTENTION
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.
Identifies information that is critical for successful
application and understanding of the product.
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
• recognize the consequence
Publication 1771-IN046B-EN-P - December 2003
Fast Analog Input Module 3
ATTENTION
Environment and Enclosure
This equipment is intended for use in a Pollution
Degree 2 industrial environment, in overvoltage
Category II applications (as defined in IEC
publication 60664-1), at altitudes up to 2000 meters
without derating.
This equipment is considered Group 1, Class A
dus
trial equipment according to IEC/CISPR
in
Publication 11. Without appropriate precautions,
there may be potential difficulties ensuring
electromagnetic compatibility in other environments
due to conducted as well as radiated disturbance.
This equipment is supplied as "open type"
m
equip
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 interior
of the enclosure must be accessible only by the use
of a tool. Subsequent sections of this publication
may contain additional information regarding
specific enclosure type ratings that are required to
comply with certain product safety certifications.
ent. It must be mounted within an enclosure
See NEMA Standards publication 250 and IEC
u
blication 60529, as applicable, for explanations of
p
the degrees of protection provided by different types
of enclosure. Also, see the appropriate sections in
this publication, as well as the Allen-Bradley
publication 1770-4.1 ("Industrial Automation Wiring
and Grounding Guidelines"), for additional
installation requirements pertaining to this
equipment.
Publication 1771-IN046B-EN-P - December 2003
4 Fast Analog Input Module
North American Hazardous Location Approval
This 1771-IFF series A module is hazardous location approved.
The following information applies when
operating this equipment in hazardous
locations:
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.
EXPLOSION HAZARD
WARNING
•Do not disconnect
equipment unless power has
been removed or the area is
known to be nonhazardous.
•Do not disconnect
connections to this equ ipment
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.
•If this product contains
batteries, they must only be
changed in an area known to
be nonhazardous.
Informations sur l’utilisation de cet
équipement en environnements dangereux :
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.
RISQUE D’EXPLOSION
AVERTISSEMENT
•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.
•S’assurer que l’environnement
est classé non dangereux avant
de changer les piles.
Publication 1771-IN046B-EN-P - December 2003
Fast Analog Input Module 5
Understand Product
Compatibilty
ATTENTION
Preventing Electrostatic Discharge
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.
• If available, use a static-safe workstation.
• When not in use, store the equipment in appropriate
static-safe packaging.
The 1771-IFF module can be used with any 1771 I/O chassis. Compatibility
and data table usage is listed below.
Catalog
Number
Use of Data TableCompatibility
Image
Input
Bits
Output
Image
Bits
Read
Block
Words
Write
Block
Words
AddressingChassis
1/2- Slot1-Slot2-Slot
Series
1771-IFF/A882441YYYA, B
A = Compatible with 1771-A1, -A2, -A4
B = Compatible with 1771-A1B, -A2B, -A3B, -A3B1, -A4B
Y = Compatible without restriction
ATTENTION
Do not use this module with Cat. No. 1771-AL PLC-2/20
or 2/30 Local Adapter.
Publication 1771-IN046B-EN-P - December 2003
6 Fast Analog Input Module
Calculate Power
Requirements
Determine Module
Placement in the I/O
Chassis
The module receives its power through the 1771 I/O power supply and
requires 500mA from the backplane.
Add this current to the requirements of all other modules in the I/O chassis to
prevent overloading the chassis backplane and/or backplane power supply.
ATTENTION
Place your module in any slot of the chassis except for the extreme left slot.
This slot is reserved for PC processors or adapter modules.
Group your modules to minimize adverse affects from radiated electrical noise
and heat. We recommend the following:
• Group analog input and low voltage dc modules away from ac modules
or high voltage dc modules to minimize electrical noise interference.
• Do not place this module in the same I/O group with a digital
high-density I/O module when using 2-slot addressing. This module
uses a byte in both the input and output image tables for block transfer.
Do not insert or remove modules from the I/O chassis
while system power is ON. Failure to observe this rule
could result in damage to the module circuitry.
The 1771-IFF is a modular component of the 1771 I/O system requiring a
properly installed system chassis. Refer to publication 1771-IN075 for detailed
information on acceptable chassis, proper installation and grounding
requirements. Limit the maximum adjacent slot power dissipation to 10W
or less.
Publication 1771-IN046B-EN-P - December 2003
Fast Analog Input Module 7
Set the Simulation Jumper
Set the Simulation Jumper
1. Locate the simulation jumper at the top edge
of the module circuit board.
2. Using your fingers, slide the jumper of f the 2 posts.
3. Carefully position the jumper on 2 of the 3 posts that
correspond to your requirement.
Set the Configuration
Jumpers
The module is shipped with the simulation jumper set in position POS G. This
setting allows input data to go above and below the range points. If the
simulation jumper is set to the POS E position, input data is clamped (does
not exceed) at range end points.
Simulation
Jumper
Simulation
Top edge of circuit board
POS GPOS E
Simulation Jumper (shown in POS E
position). This position provides Clamped
Input Data at range end points.
Top edge of circuit board
POS GPOS E
Simulation Jumper (shown in POS G
position). This position does not Clamp Input
Data at range end points.
The module has configuration jumpers for determining the input type (voltage
or current) desired for each input. The module is shipped with the
configuration jumpers positioned for voltage mode.
Not that you can select either voltage or current for each input, but they must
l be either single-ended or all differential. Do not mix single-ended or
al
differential inputs on the module.
Remove the four screws securing the side
11
cover to the module and remove the covers.
Reposition the cover and secure with the four
13
screws removed in step 1.
19805
19813
Reposition the configuration jumpers associated with each
12
input channel according to your requirements
Y ou can mix voltage mode and current mode
settings on the module. Make sure that the entire
module is set for either single-ended or dif ferential.
Do not mix them.
Voltage Mode
Differential or Single-ended (factory set)
Channel
Current Mode
Differential
Current
Single-ended
Odd channel current
Even channel voltage
Even channel current
Odd channel voltage
Single-ended
Current
1 and 2
Channel
3 and 4
Channel
5 and 6
Channel
7 and 8
Channel
9 and 10
Channel
11 and 12
Channel
13 and 14
Channel
15 and 16
Configuration
Jumpers
DifferentialSingle-ended
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Publication 1771-IN046B-EN-P - December 2003
8 Fast Analog Input Module
Key the Backplane
Connector
ATTENTION
Observe the following precautions
when inserting or removing keys:
• insert or remove keys with
• make sure that key placement
Incorrect keying or the use of a tool
can result in damage to the backplane
connector and possible system faults.
your fingers
is correct
Place your module in any slot in the chassis except the leftmost slot which is
reserved for processors or adapters.
Position the keying bands in the backplane connectors to
correspond to the key slots on the module.
I/O chassis
Upper Connector
Y ou can change the position of these
bands if subsequent system design and
rewiring makes insertion of a dif ferent
type of module necessary.
Place the keying bands:
between 10 and 12
between 24 and 26
11022-I
Install the Module and Field
Wiring Arm
ATTENTION
WARNING
Remove power from the 1771 I/O chassis backplane and
field wiring arm before removing or installing the I/O
module.
• Failure to remove power from the backplane or wiring
arm could cause module damage, degradation of
performance, or injury.
• Failure to remove power from the backplane could
cause injury or equipment damage due to possible
unexpected operation.
If you insert or remove the module while backplane power
is on, or connect or disconnect the wiring arm 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.
Publication 1771-IN046B-EN-P - December 2003
Fast Analog Input Module 9
1
2
1771-A1B, -A2B, -A3B, -A3B1, -A4B I/O chassis
locking tab
card guides
Snap the chassis latch over
the top of the module to secure it.
Attach the wiring arm (1771-WG) to the
horizontal bar at the bottom of the I/O chassis.
The wiring arm pivots upward and
connects with the module so you can install
or remove the module without
disconnecting the wires.
IFF module
1771-A1B, -A2B, -A3B1, -A4B Series B I/O chassis
locking bar pin
Swing the chassis locking bar down into place to secure the
modules. Make sure the locking pins engage.
wiring arm
locking bar
card guides
IFF module
19809
1771-WG
Connect Wiring to the Field
Wiring Arm
remove
horizontal bar
install
17643
Connect your I/O devices to the cat. no. 1771-WG wiring arm shipped with
the module
ATTENTION
Remove power from the 1771 I/O chassis backplane and
field wiring arm before removing or installing the I/O
module.
• Failure to remove power from the backplane or wiring
arm could cause module damage, degradation of
performance, or injury.
• Failure to remove power from the backplane could
cause injury or equipment damage due to possible
unexpected operation.
Publication 1771-IN046B-EN-P - December 2003
10 Fast Analog Input Module
WARNING
If you connect or disconnect the wiring 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.
Input connections for the 1771-IFF with:
• single-ended inputs are shown on page 11.
• differential inputs are shown on page 12.
Minimizing Ground Loops
To minimize ground loop current on input circuits:
• use single-ended mode whenever possible
• use 2-wire transmitters with a common power supply
• separate 2-wire and 4-wire transmitters between different modules
• tie 4-wire transmitter and/or separate power supply grounds together
IMPORTANT
Mixing 2-wire and 4-wire transmitter inputs on the same
module is not recommended. Power supply placement can
make it impossible to eliminate ground loops.
Cable Lengths
Recommended maximum cable length for voltage-mode input devices is 50
feet (15.24m), due to possible signal degradation and electrical noise immunity
in typical industrial environments. Cable length for current-mode input devices
need not be as restrictive because analog signals from these devices are less
sensistive to electrical noise interference.
Publication 1771-IN046B-EN-P - December 2003
Fast Analog Input Module 11
Connection Diagram for 16 Single-ended Inputs and Two-Wire Transmitters
single-ended wiring
Note: Refer to transmitter manufacturers
specifications for power supply connections.
Note:
– All module commons are electrically
tied together inside the module.
– Jumper all unused channels to module
common to reduce noise.
– Tie power supply grounds together
to minimize ground loops.
The 1771-IFF module does not supply loop power for the input
device. The user must supply loop power for loop-powered input devices.
The sensor cable must be shielded. The shield must:
extend the length of the cable, but be connected only at the 1771 I/O chassis
extend up to the point of termination
Important:The shield should extend to the termination point, exposing just enough
2-Wire
Transmitter
Power
Supply
2-Wire
Transmitter
Power
Supply
cable to adequately terminate the inner conductors. Use heat shrink or
another suitable insulation where the wire exits the cable jacket.
+
–
+
_
Functional Ground
Channel 1
Channel 2
Channel 3
Channel 4
Module Common
Channel 5
Channel 6
Channel 7
Channel 8
Module Common
Channel 9
Channel 10
Channel 11
Channel 12
Module Common
Channel 13
Channel 14
Channel 15
Channel 16
Module Common
Module Common
1771-WG
Field Wiring Arm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Connection Diagram for 16 Single-ended Inputs and Four-Wire Transmitters
Note: Refer to transmitter manufacturers
specifications for power supply connections.
Note:
– All module commons are electrically
tied together inside the module.
– Jumper all unused channels to module
common to reduce noise.
– Tie power supply grounds together
to minimize ground loops.
The 1771-IFF module does not supply loop power for the input
device. The user must supply loop power for loop-powered input devices.
The sensor cable must be shielded. The shield must:
extend the length of the cable, but be connected only at the 1771 I/O chassis
extend up to the point of termination
Important:The shield should extend to the termination point, exposing just enough
Power
Supply
Power
Supply
cable to adequately terminate the inner conductors. Use heat shrink or
another suitable insulation where the wire exits the cable jacket.
4-Wire
Transmitter
4-Wire
Transmitter
+
–
+
_
Functional Ground
Channel 1
Channel 2
Channel 3
Channel 4
Module Common
Channel 5
Channel 6
Channel 7
Channel 8
Module Common
Channel 9
Channel 10
Channel 11
Channel 12
Module Common
Channel 13
Channel 14
Channel 15
Channel 16
Module Common
Module Common
1771-WG
Field Wiring Arm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Publication 1771-IN046B-EN-P - December 2003
12 Fast Analog Input Module
differential wiring
Connection Diagram for 8 Differential Inputs and Two-Wire Transmitters
Note: Refer to transmitter manufacturers
specifications for power supply connections.
Note:
2-Wire
Transmitter
– Unused channels must have their + and
- inputs jumpered together and tied to
module common to reduce noise.
– Tie power supply grounds together to
2-Wire
Transmitter
minimize ground loops.
The 1771-IFF module does not supply loop power for the input device.
The user must supply loop power for loop-powered input devices.
Configuring the module for differential inputs does not provide isolation.
The sensor cable must be shielded. The shield must:
extend the length of the cable, but be connected only at the 1771 I/O chassis
extend up to the point of termination
Important:The shield should extend to the termination point, exposing just enough
cable to adequately terminate the inner conductors. Use heat shrink or
another suitable insulation where the wire exits the cable jacket.
Power
Supply
Power
Supply
+
–
+
–
Functional Ground
Channel 1+
Channel 1Channel 2+
Channel 2-
Not used
Channel 3+
Channel 3Channel 4+
Channel 4Not used
Channel 5+
Channel 5Channel 6+
Channel 6Not used
Channel 7+
Channel 7Channel 8+
Channel 8Module Common
Module Common
1771-WG
Field W iring Arm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Connection Diagram for 8 Differential Inputs and Four-Wire Transmitters
Note: Refer to transmitter manufacturers
specifications for power supply connections.
Note:
Power
Supply
4-Wire
Transmitter
– Unused channels must have their + and
- inputs jumpered together and tied to
module common to reduce noise.
– Tie power supply grounds together to
Power
Supply
4-Wire
Transmitter
minimize ground loops.
The 1771-IFF module does not supply loop power for the input device.
The user must supply loop power for loop-powered input devices.
Configuring the module for differential inputs does not provide isolation.
The sensor cable must be shielded. The shield must:
extend the length of the cable, but be connected only at the 1771 I/O chassis
extend up to the point of termination
Important: The shield should extend to the termination point, exposing just enough
cable to adequately terminate the inner conductors. Use heat shrink or
another suitable insulation where the wire exits the cable jacket.
+
–
+
–
Functional Ground
Channel 1+
Channel 1-
Channel 2+
Channel 2-
Not used
Channel 3+
Channel 3-
Channel 4+
Channel 4-
Not used
Channel 5+
Channel 5-
Channel 6+
Channel 6-
Not used
Channel 7+
Channel 7-
Channel 8+
Channel 8Module Common
Module Common
1771-WG
Field Wiring Arm
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
Publication 1771-IN046B-EN-P - December 2003
Fast Analog Input Module 13
Grounding
1
Cable Grounding
Remove a length of cable
jacket from the Belden 8761
cable.
Belden 8761 Cable
When using shielded cable wire, ground the foil shield and drain wire only at
one end of the cable. We recommend that you wrap the foil shield and drain
together, and connect them to a chassis mounting bolt, grounding stud or
chassis single-point grounding point. Use heat-shrink tubing to seal the exit
point of the wires. At the opposite end of the cable, tape exposed shield and
drain wire with electrical tape to insulate it from electrical contact.
Pull the foil shield and bare
drain wire from the insulated
wires.
Bare drain
wire
Insulated
wires
Foil
shield
Twist the foil shield and drain
wire together to form a single
strand.
Attach a ground lug, and apply
heat shrink tubing to the exit area.
Length as needed
20104
2
When you connect grounding conductors to the I/O
chassis grounding stud, place a star washer under the
first lug, then place a nut with captive lock washer on
top of each ground lug.
Grounding Stud
I/O Chassis
Side Plate
1
Use the cup washer if crimp-on lugs are not used.
Chassis Ground
Star
Washer
Ground Lug
Nut
Nut and Captive
Washer
Ground Lug
Shield and Drain
twisted together
19480
Single-point Grounding
Extend shield to termination point. Expose just enough
cable to adequately terminate inner conductors.
Use heat shrink tubing or
other suitable insulation
where wire exits cable
jacket.
1
Shield and Drain
twisted together
#10 Thread-forming screw
External-tooth
Washers
19923
Publication 1771-IN046B-EN-P - December 2003
14 Fast Analog Input Module
pg
any of 7 input voltage or current
Configure the Module
Dec. Bits15 14 13
Octal Bits17 16 15
Word 187654321Range Selection - Channels 1 - 8
2161514131211109
Input range selections allow the
user to configure the inputs for
ranges. Two bits are required for
for each channel. Bits 00 and 01 for
channel 1, bits 02 and 03 for
channel 2, etc.
3Real Time Sampling
Real time sampling - Default is no RTS
Bit 10 Bit 09
(11)
(12)
00
1
0
1
0
1
1
4
Data format - set to
match your processor .
BCD (default)
2' s Complement, data first
Two' s complement binary
Signed magnitude binary
Minimum sign bits , when set, designate negative minimum scaling values for the
corresponding input channels. Bit 00 corresponds to channel 1, bit 01 corresponds to
channel 2, etc.
You must configure the module to conform to the analog device and specific
application that you have chosen. Use the configuration information below to
configure your module to your specifications.
1
2
1
4
Bit 01Bit 00Voltage or Current Input
100
11
1
13
2
001 to 5V dc, 4 to 20mA (default)
0
1
1
Data
Format
0807 06 0504 03 02 01 00
9
111007 06 0504 03 02 01 00
10 to 5V dc, 0 to 20mA
0-5 to +5V dc, -20 to +20mA
1-10 to +10V dc, 0 to 10V dc
Input
Type
Digital Filter
Digital filter reduces ef fect of noise on input. (Default is no filter.)
Input type, set bit for differential mode on all channels.
Reset (0) = single-ended inputs (default)
Set (1) = differential inputs
Description
Range Selection - Channels 9-16
Real time sampling, data format,
input type and digital filter
Sign Bits, minimum scaling
values
Maximum sign bits, when set, designate maximum scaling values that are negative.
Maximum scaling value must be greater than minimum on any particular channel. Bit 00
corresponds to channel 1, bit 01 corresponds to channel 2, etc.
Minimum scaling values for each channel. Enter in BCD format.Channel 1 - minimum scaling
Maximum scaling values for each channel. Enter in BCD format.Channel 1 - maximum scaling
Offset calibration - Each bit represents a channel (bit 00 to channel 1, bit 02 to channel 2,
etc.). When the bit is set, and a BTW has been sent, the module will read the channels and
adjust the of fset to analog ground potential. In differential mode, bits 08 thru 15 (10 thru 17
in octal) are ignored. In current mode, apply 0mA.
Gain calibration - Each bit represents a channel (bit 00 to channel 1, bit 02 to channel 2, etc).
When the bit is set, and a BTW has been sent, the module will read the channels and adjust
the gain correction values. If used on +, 0 to 5, or 1 to 5V ranges, a value of 5V is expected.
If used on +10V range, 10V is expected. In dif ferential mode, bits 08 thru 15 (10 thru 17 in
octal) are ignored. In current mode, apply 20mA.
14131211109876543210Channel Sampling Disable
15
Sign Bits, maximum scaling
values
Of fset Calibration
Gain Calibration
Publication 1771-IN046B-EN-P - December 2003
Fast Analog Input Module 15
Underrange bts for each channel. Bit 00 for channel 1, bit 01 for channel 2, etc
Use the following table to read data from your input module.
Dec. Bits15 14 13 1211 10 09 080706050403020100
Octal Bits17 16 15 14 13 12 11100706050403020100
PU
Word 1
Hardware fault - (HF) When this bit is set, the
dc/dc converter fuse has blown. Digital logic will
continue to operate.
EEPROM status bit - (EE) This bit is set if an error occurs
saving calibration data to nonvolatile memory . If this bit is
set at powerup, the data from the EEPROM did not pass the
checksum and no calibration values are used.
Calibration status bit - (CS) When calibrating the module,
this bit will be cleared if the calibration was successful. If the
bit is set, an incorrect voltage/current was applied, or
offset and gain calibrations were attempted simultaneously
Real time sample fault bit - (RTS) This bit is set if the module
is configured for R TS and a block transfer read has not occurred
within the user±programmed period.
2
3
416 15 14 13 12 1110987654321
5Channel 1 InputChannel 1 Input
6Channel 2 InputChannel 2 Input
7Channel 3 InputChannel 3 Input
8Channel 4 InputChannel 4 Input
16 15 14 13 12 1110987654321
16 15 14 13 12 1110987654321
i
These bits are set (1) at approximately the input range limits shown on the right.
Overrange bits for each channel. Bit 00 for channel 1, bit 01 for channel 2, etc.
These bits are set (1) at approximately the input range limits shown on the right.
Polarity bits - Set when input is less than zero. Bit 00 for channel 1, bit 01 for
channel 2, etc.
HF EE CS
.
RTSIS
OR
Power up bit - (PU) Used by the
module to tell the processor that it is
alive but not yet configured. It is a key
element in the application program.
Out of range bit - (OR) This bit is sent
to tell the processor that one or more
channels are either over or under range.
Invalid scaling bit - (IS) This bit reports
that the scaling is somehow invalid. Usually,
both values are equal or minimum is greater
than maximum when this bit comes on. Can
also be an invalid filter value.
Data underrange for channels
1-16
Data overrange for channels
1-16
1 to 5V dc, 4 to 20mA (default)
.
0 to 5V dc, 0 to 20mA
-5 to +5V dc, -20 to +20mA
-10 to +10V dc, 0 to 10V dc
Data polarity for channels 1-16
Description
Diagnostics
⇓ ⇓ ⇓ ⇓
20Channel 16 InputChannel 16 Input
21Offset calibration results bits - Each bit represents a channel. After a
calibration BTW has been sent, the module confirms calibration by echoing back
the channels that were calibrated during the offset calibration BTW . In
differential mode, channels 09 thru 16 are zero.
22Gain calibration results bits - Each bit represents a channel. After a calibration
BTW has been sent, the module confirms calibration by echoing back the
channels that were calibrated during the gain calibration BTW. In dif ferential
mode, channels 09 thru 16 are zero.
23binary, 1ms resolutionTime Stamp
2410ms resolutionScan time
Of fset Calibration Results
Gain Calibration Results
Publication 1771-IN046B-EN-P - December 2003
16 Fast Analog Input Module
When Data Format bits 9 and 10 in block transfer write word 3 are set for “2’s
complement - data first,” the block transfer read will transmit channel data first
in the transfer. For single-ended configuration, words 1 through 16 will have
channel data. For differential configuration, words 1 through 8 will contain
channel data.
Default Configuration
If a write block of five words with all zeroes is sent to the module, default
selections will be:
• 1 to 5V dc or 4 to 20mA (dependent on configuration jumper setting)
• BCD data format
• no real time sampling (RTS)
• no filtering
• single-ended inputs
• 8X oversample
• oversample enabled on all channels
Interpret Status Indicators
The front panel of the analog input module contains a green RUN indicator
and a red FAULT indicator. At power-up, the module momentarily turns on
the red indicator as a lamp test, then checks for:
• correct RAM operation
• firmware errors
If there is no fault, the red indicator goes off.
The green indicator comes on when the module is powered. It will flash until
the module is programmed. If a fault is found initially or occurs later, the red
fault indicator lights. The module also reports status and specific faults (if they
occur) in every transfer of data (BTR) to the PC processor. Monitor the green
and red indicators and status bits in word 1 of the BTR file when
troubleshooting your module.
FAST
ANALOG
(12 BIT)
RUN
FL T
Green RUN indicator
Red F AULT indicator
Publication 1771-IN046B-EN-P - December 2003
Fast Analog Input Module 17
Troubleshooting
Possible module fault causes and corrective action is described in the following
table.
IndicatorsProbable CauseRecommended Action
RUN (green on)
FLT (red off)
RUN (green blinking)
FLT (red off)
RUN (green off)
FLT (red on)
RUN (green off)
FLT (red off)
Normal operationNone
Awaiting configuration
bloc
k transfer write
Hardware failure in
modul
e
No powerTurn off power. Remove and reinsert
Send configuration BTW
Return module for repair
modul
e into chassis. Return power. If
problem still exists, and chassis
power supply is functioning properly,
return the module for repair.
Publication 1771-IN046B-EN-P - December 2003
18 Fast Analog Input Module
Specifications
DescriptionValue
Inputs per module16 single-ended; 8 differential low level
Module Location1771 I/O chassis - 1 slot
Input Voltage Ranges (nominal)+1 to +5V dc
0 to +5V dc
-5 to +5V dc
-10 to +10V dc
0 to +10V dc
Input Current Ranges (nominal)+4 to +20mA
0 to 20mA
-20 to +20mA
Resolution12-bit binary
12 bits plus sign on bipolar ranges
Accuracy1.0% of full scale range at 25°C
Linearity
Repeatability
Isolation VoltageTested to 850V dc for 1s
Input overvoltage protection
Input overcurrent protection
(current ranges)
Common mode voltage
Input impedance>10 megohms (voltage ranges)
Common mode rejection80db, dc - 120Hz
Current requirements500mA at 5V dc from I/O chassis backplane
Power dissipationBackplane: 2.5W maximum; Inputs: 2.5W maximum
Thermal dissipation17 BTU/hr maximum
Unscaled BCD and binary output
to processor
+1 LSB
+1 LSB
35V maximum (voltage mode)
8V maximum (current mode)
30mA
+35V
250 ohms (current ranges)
0000 to 4095 for polar ranges (0-5V, 1-5V 0-20mA, and 4-20mA)
-409510 to +409510 for bipolar ranges (+5V, +10V,+ 20mA)
Publication 1771-IN046B-EN-P - December 2003
Engineering units sent to
processor
Fastest internal scan rate8 channels in less than 2ms (depending on number of
10V/m with 1kHz sine-wave 80%AM from 30MHz to 1000MHz
±1kV at 5kHz on signal ports
±2kV line-earth(CM) on shielded ports
10Vrms with 1kHz sine-wave 80%AM from 150kHz to 30MHz
Group 1, Class A (with appropriate enclosure)
14 AWG (2.5mm
2
) - 22 AWG (0.25mm2) solid or stranded copper
wire rated at 75°C or greater
3/64 inch (1.2mm) insulation maximum
1
2
between 24 and 26
UL - UL Listed Industrial Control Equipment
CSA - CSA Certified Process Control Equipment
CSA - CSA Certified Process Control Equipment for Class I,
Division 2, Groups A, B, C and D Hazardous locations
2 -
European Union 89/336/EEC EMC Directive,
CE
compliant with:
EN 50082-2; Industrial Immunity
EN 61000-6-2; Industrial Immunity
EN 61000-6-4; Industrial Emissions
EN 61326; Meas./Control/Lab., Industrial Requirements
2
- Australian Radiocommunications Act compliant with
C-Tick
AS/NZS CISPR 11, Industrial Emissions
Publication 1771-IN046B-EN-P - December 2003
Rockwell Automation Support
Rockwell Automation provides technical information on the web to assist you in using our products. At
http://support.rockwellautomation.com, you can find technical manuals, a knowledge base of FAQs, technical and
application notes, sample code and links to software service packs, and a MySupport feature that you can customize
to make the best use of these tools.
For an additional level of technical phone support for installation, configuration and troubleshooting, we offer
TechConnect Support programs. For more information, contact your local distributor or Rockwell Automation
representative, or visit http://support.rockwellautomation.com.
Installation Assistance
If you experience a problem with a hardware module within the first 24 hours of installation, please review the
information that's contained in this manual. You can also contact a special Customer Support number for initial help
in getting your module up and running:
United States1.440.646.3223
Monday – Friday, 8am – 5pm EST
Outside United StatesPlease contact your local Rockwell Automation representative for any technical support issues.
New Product Satisfaction Return
Rockwell tests all of our products to ensure that they are fully operational when shipped from the manufacturing
facility. However, if your product is not functioning and needs to be returned:
United StatesContact your distributor. You must provide a Customer Support case number (see phone number
above to obtain one) to your distributor in order to complete the return process.
Outside United StatesPlease contact your local Rockwell Automation representative for return procedure.
Publication 1771-IN046B-EN-P - December 2003 20PN 957859-99