Installation Instructions
FLEX I/O Digital Sourcing Input and
Sinking Output Modules
Cat. Nos. 1794-IV32, 1794-OV32
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
Automation sales office or online at http://www.literature.rockwellautomation.com) 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 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
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 (6562 ft) without
derating.
This equipment is considered Group 1, Class A industrial equipment
according to IEC/CISPR 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 equipment. 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, V2, V1, V0 (or equivalent) if non-metallic. 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.
In addition to this publication, see:
• Industrial Automation Wiring and Grounding Guidelines, for
additional installation requirements, Allen-Bradley publication
1770-4.1.
• NEMA Standards publication 250 and IEC publication 60529, as
applicable, for explanations of the degrees of protection provided by
different types of enclosure.
SGI-1.1 available from your local Rockwell
WARNING
ATTENTION
ATTENTION
WARNING
If 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.
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.
• Store the equipment in appropriate static-safe packaging when not
in use.
This product is grounded through the DIN rail to chassis ground. Use zinc
plated yellow-chromate 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.
Do not connect directly to line voltage. Line voltage must be supplied by a
suitable, approved isolating transformer or power supply having short circuit
capacity not exceeding 100 VA maximum or equivalent.
North American Hazardous Location Approval
The following modules are North American Hazardous Location approved:
1794-IV32, 1794-OV32.
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.
WARNING
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.
• 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.
AVERTISSEMENT
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.
• S’assurer que l’environnement est
classé non dangereux avant de changer
les piles.
Publication 1794-IN122A-EN-P - June 2008
2 FLEX I/O Digital Sourcing Input and Sinking Output Modules
IMPORTANT
WARNING
To comply with North American restrictions, all connected I/O must be
powered from a source compliant with the following:
Class 2
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.
Install Your Digital Module
7
3
4
Description Description
1 Keyswitch 5 Alignment bar
2 Terminal base 6 Groove
3 Flexbus connector 7 Latching mechanism
4 Module
The module mounts on a 1794 terminal base.
ATTENTION
ATTENTION
1. Rotate the keyswitch (1) on the terminal base (2) clockwise to position 2 as
2. Make certain the flexbus connector (3) is pushed all the way to the left to
3. Make sure the pins on the bottom of the module are straight so they will
4. Position the module (4) with its alignment bar (5) aligned with the groove
5. Press firmly and evenly to seat the module in the ter minal base unit. The
During mounting of all devices, be sure that all debris (metal chips, wire
strands, etc.) is kept from falling into the module. Debris that falls into the
module could cause damage on power up.
Do not remove or replace a Terminal Base unit when power is applied.
Interruption of the backplane can result in unintentional operation or
machine motion.
required for this type of module.
connect with the neighboring terminal base/adapter.
You cannot install the module unless the connector is fully extended.
align properly with the connector in the terminal base.
(6) on the terminal base.
module is seated when the latching mechanism (7) is locked into the
module.
5
Connect Wiring for the 1794-IV32
(using a 1794-TB32 or -TB32S Terminal Base)
1. Connect individual input wiring (0...15) to numbered terminals on the 0-15
row (A) as indicated in Table 1.
2. Connect the associated power to the +V1 terminal (35, 37, 39 or 41) on
the 34-51 row (C) as indicated in
3. Connect the associated common for inputs 0...15 to COM1 (terminal 36,
38, 40 or 42) on the 34-51 row (C) as indicated in
4. Connect individual input wiring (16...31) to numbered terminals on the
16-33 row (B) as indicated in Table 1.
Do not connect to terminals 16 or 33.
5. Connect the associated power to the +V2 terminal (43, 45, 47 or 49) on
1
2
6
the 34-51 row (C) as indicated in Ta ble 1.
6. Connect the associated common for inputs 16...31 to COM2 (terminal 44
46, 48 or 50) on the 34-51 row (C).
7. If continuing input wiring power for inputs 0...15 to the next terminal base,
connect a jumper from terminal 41 (+V1) on this terminal base unit to the
power terminal on the next terminal base unit.
8. If continuing input wiring for inputs 0...15 common to the next terminal
base, connect a jumper from terminal 42 (COM1) on this terminal base
unit to the common terminal on the next terminal base unit.
9. If continuing input wiring power for inputs 16...31 to the next terminal
base, connect a jumper from terminal 49 (+V2) on this terminal base unit
to the power terminal on the next terminal base unit.
10. If continuing input wiring 16...31 common to the next terminal base,
connect a jumper from terminal 50 (COM2) on this terminal base unit to
the common terminal on the next terminal base unit.
Table 1.
Table 1.
Connect Wiring for the 1794-OV32
1. Connect individual output wiring (0 to 15) to numbered terminals on the
0-15 row (A) as indicated in Ta ble 1.
2. Connect the associated power to the +V1 terminal (35, 37, 39 or 41) on
the 34-51 row (C) as indicated in Ta ble 1.
3. Connect the associated output common (-V1) for outputs 0...15 to COM1
(terminal 36, 38, 40 or 42) on the 34 to 51 row (C).
4. Connect individual output wiring (16 to 31) to numbered terminals on the
16-33 row (B) as indicated in Ta ble 1.
5. Connect the associated power to the +V2 terminal (43, 45, 47 or 49) on
the 34-51 row (C) as indicated in Ta ble 1.
6. Connect the associated output common (-V2) for outputs 16...31 to
COM2 (terminals 44, 46, 48 or 50) on the 34-51 row (C).
7. If continuing power to the next terminal base, connect a jumper from
terminal 35, 37, 39 or 41 (+V1) and 43, 45, 47 or 49 (+V2) on this base
unit to the power terminal on the next base unit.
8. If continuing output common return to the next base unit, connect a
jumper from terminal 36, 38, 40 or 42 (COM1) and 44, 46, 48 or 50
(COM2) on this base unit to common on the next base unit (refer to the
installation instructions for the next type of terminal base unit).
Publication 1794-IN122A-EN-P - June 2008
FLEX I/O Digital Sourcing Input and Sinking Output Modules 3
Table 1 Wiring Connections for 1794-IV32, 1794-OV32
Channel Signal Channel Signal
0 A-0 16 B-17
1 A-1 17 B-18
2 A-2 18 B-19
3 A-3 19 B-20
4 A-4 20 B-21
5 A-5 21 B-22
6 A-6 22 B-23
7 A-7 23 B-24
8 A-8 24 B-25
9 A-9 25 B-26
10 A-10 26 B-27
11 A-11 27 B-28
12 A-12 28 B-29
13 A-13 29 B-30
14 A-14 30 B-31
15 A-15 31 B-32
+V1 dc power (inputs 0...15) Power terminals 35, 37, 39 and 41 for inpu ts 0...15.
COM1 dc Return (inputs 0...15) Common terminals 36, 38, 40 and 42 for inputs 0...1 5.
(1)
+V2 dc power
(inputs IN16-IN31)
COM2 dc return (inputs IN16-IN31) Co mmon terminals 44, 46, 48 and 50 for inputs 16...31.
(1)
2-wire input devices use signal and return terminals
3-wire devices use signal, retu rn and supply terminals.
+V1 connected to terminals 35, 37, 39 and 41
V1 Return connected to terminals 36, 38, 40 an d 42
Power terminals 43, 45, 47 and 49 for inpu ts 16...31.
+V2 connected to terminals 43, 45, 47 and 49
V2 Return connected to terminals 44, 46, 48 an d 50
1794-TB32 and -TB32S for 1794-IV32, 1794-OV32
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33
NC
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51
NC COM1 COM1 COM1 COM1 COM2 COM2 COM2 COM2 NC
+V1 +V1 +V1 +V1 +V2 +V2 +V2 +V2
+V1 = Terminals 35, 37, 39 and 41
+V2 = Terminals 43, 45, 47 and 49
COM1 = Terminals 36, 38, 40 and 42
COM2 = Terminals 44, 46, 48 and 50
NC = No connections (terminals 16, 33, 34 and 51)
Inputs/Outputs - Channels 00-15
Inputs/Outputs - Channels 16-31
A
B
NC
C
(1794-TB32 shown)
2 and 3-Wire Input Wiring for 1794-IV32
0 -15
16-33
34-51
0
A
16
B
34
C
01 0 1
2-Wire Device
(Sinking Output)
3-Wire Device
(Sinking Output)
Configure Your Input Module
You configure your input module by setting bits in the configuration word (word 3).
Dec 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Oct 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
Read 1 I15 I14 I13 I12 I11 I10 I9 I8 I7 I6 I5 I4 I3 I2 I1 I0
Read 2 I31 I30 I2 9 I28 I27 I26 I25 I24 I23 I22 I21 I20 I19 I18 I17 I16
Write 1 Not used Input Filter FT
Where I = Input
C = Counter value for input 15
FT = Input filter time
CR = Counter Reset
CF = Counter Fast - where 1 = Fast input (raw) data; 0 = Standard input filtered data
NU = Not used
0...31
Note: C, CR and CF not available when used with any series 1794-ASB or -ASB2 Remote I/O Adapters.
Not used
Set the Input Filter Time for the 1794-IV32
To set the input filter time, set the associated bits in the output image
(complementary word) for the module.
09 08 07 06 05 04 03 02 01 0015 14 13 12 11 10
11 10 07 06 05 04 03 02 01 0017 16 15 14 13 12
Dec.
Octal
O:010
FT = 00...31
Input Filter Times
Bits Description Selected Filter Time
10 09 08 Filter Time for inputs 00...31 Off to On/On to Off
0 0 0 Filter Time 0 (Default) 0.25ms
0 0 1 Filter Time 1 0.50ms
0 1 0 Filter Time 2 1ms
0 1 1 Filter Time 3 2ms
1 0 0 Filter Time 4 4ms
1 0 1 Filter Time 5 8ms
1 1 0 Filter Time 6 16ms
1 1 1 Filter Time 7 32ms
Configure Your Output Module
You configure your output module by setting bits in the configuration word
(word 3)
Dec 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Oct 17 16 15 14 13 12 11 10 7 6 5 4 3 2 1 0
Read 0 Not used
Write 1 O15 014 013 012 011 010 O9 O8 O7 O6 O5 O4 O3 O2 O1 O0
Write 2 O31 O30 O29 028 O27 O26 O25 O24 O23 O22 O21 O20 O19 O18 O17 O16
Where O = Output
Specifications
Specifications - 1794-IV32 Flex I/O Digital Sourcing Input Module
Specification Description
Number of I/O channels 32 (2 groups of 16), nonisolated within gro ups, sourcing
Module location Cat. No. 1794-TB32, -TB32S
On-state voltage 19.2V dc minimum
On-state current 2.0 mA minimum
Off-state voltage 5.0V dc maximum
Off-state current 1.5mA minimum
Input impedance 6.0K ohms maximum
Isolation voltage 50V (continuous), Basic Insulation Type
Flexbus current 40mA
Power dissipation 6W maximum @ 31.2V dc
Thermal dissipation Maxim um 20.5 BTU/hr @ 31.2V dc
Indicators (field side indication,
customer device driven)
Input filter time
Off to On
On to Off
(1)
Input off-to-on filter time is the time from a valid input signal to recognition by the module.
Input on-to-off filter tim e is time from the input signal dropping be low the valid level to recognition by the module.
24V dc nominal
31.2V dc maximum
4.1mA nominal @ 24V dc
6.0mA maximum
Type tested at 707V dc for 60 s, between field side and system
No isolation between individual channels
32 yellow status indicators
(1)
0.25ms, 0.5ms, 1ms, 2ms, 4ms, 8ms, 16ms, 32ms
0.25ms, 0.5ms, 1ms, 2ms, 4ms, 8ms, 16ms, 32ms
Publication 1794-IN122A-EN-P - June 2008
Specifications - 1794-OV32 Flex I/O Digital Sinking Output Module
Specification Description
Number of I/O channels 32 (2 groups of 16), nonisolated within gr oups, sinking
Module location Cat. No. 1794-TB32, -TB32S
On-state voltage 10V dc minimum
Output current rating 14A maximum per module
Off-state voltage 31.2V dc maximum
On-state current 1.0mA minimum per channel
Surge current 2A for 50ms, repeatable every 2s
Off-state leakage 0.5mA maximum
On-state voltage drop 0.2V dc maximum
Isolation voltage 50V (continuous), Basic Insulation Type
Output signal delay
Flexbus current 110mA
Power dissipation 4.4W @ 31.2Vdc
Thermal dissipation 8.53 BT U/hr maximum @ 31.2V dc
Indicators (field side indication,
customer device driven)
Pilot Duty Rating DC13
Fusing Module outputs are not fused. Fusing is recommended. If fusing is desired,
(1)
The time from the receipt of an on or off command to the output actually turning on or off.
(1)
24V dc nominal
31.2V dc maximum
6A total for channels 0...15
8A total for channels 16...31
500mA maximum per channel
Type tested at 707V dc for 60 s, between field side and system
No isolation between individual channels
Off to On - 0.5ms maximum
On to Off - 1.0ms maximum
32 yellow status indicators
you must provide external fusing. Use SAN-O M Q4-800 800mA fuses.
Environmental Specifications
Specification Description
Operating temperature IEC 60068-2-1 (Test Ad, Operating Cold),
Storage temperature IEC 60068-2-1 (Test Ab, Unpackaged Non-operating Cold),
Relative humidity IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):
Vibration IEC60068-2-6 (Test Fc, Operating):
Shock IEC60068-2-27 (Test Ea, Unpackaged shock):
Emissions CISPR 11:
ESD immunity IEC 61000-4-2:
Radiated RF immunity IEC 61000-4-3:
EFT/B immunity IEC 61000-4-4:
Surge transient immunity IEC 61000-4-5:
Conducted RF immunity IEC 61000-4-6:
IEC 60068-2-2 (Test Bd, Operating Dry Heat),
IEC 60068-2-14 (Test Nb, Operating Thermal Shock):
0...55 °C (32...131 °F)
IEC 60068-2-2 (Test Bb, Unpackaged Non-operating Dry Heat),
IEC 60068-2-14 (Test Na, Unpackaged Non-operating Thermal Shock):
-40...85 °C (-40...185 °F)
5...95% non-condensing
5g @ 10...500Hz
Operating 30g
Non-operating 50g
Group 1, Class A (with appropriate enclosu re)
6kV contact discharges
8kV air discharges
10V/m with 1 kHz sine-wave 80% AM fro m 80…2000 MHz
10V/m with 200 Hz 50% Pulse 100% A M at 900 MHz
10V/m with 200 Hz 50% Pulse 100% AM at 1890 MHz
1V/m with 1 kHz sine-wave 80% AM from 2000 …2700 MHz
±2k V at 5kHz on signal ports
±1 kV line-line(DM) and ±2 kV line-earth(CM) on sign al ports
10V rms with 1 kHz sine-wave 80% AM from 15 0 kHz...80 MHz
General Specifications 1794-IV32, 1794-OV32
Specification Description
Terminal base screw torque Determined by installed te rminal base
Dimensions (with module installed)
H x W x D
External dc power supply voltage 24V dc nominal
Voltage range 1794- IV32 - 19.2...31.2Vdc (including 5% ac ripple)
Supply current 1794-OV32 -50mA @ 24V dc
North American temp code T4A
Keyswitch position 2
Enclosure type rating None (open-style)
Wire size Determined by installed terminal base
Wiring category
(1)
(1)
Use this Conductor Category information for planning conductor routing. Refer to Industrial Automation Wiring and
Grounding Guidelines, publication 1770-4.1
94 x 94 x 69 mm
3.7 x 3.7 x 2.7 inches
1794-OV32 - 10.0...31.2Vdc (including 5% ac ripple)
2- on signal ports
.
Certifications
Certifications (when product is marked)
c-UL-us UL Listed Industrial Control Equipme nt, certified for US and Canada.
CE European Union 200 4/108/EC EMC Directive, compliant with:
C-Tick Australian Radiocommunications Act, compliant with:
(1)
See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, and othe r certification
details.
See UL File E65584.
UL Listed for Class I, Division 2 Group A,B,C,D Hazardous Locations,
certified for U.S. and Canada. See UL File E19 4810.
EN 61326; Meas./Control/Lab., Industria l Requirements
EN 61000-6-2; Industrial Immunity
EN 61000-6-4; Industrial Emissions
EN 61131-2; Programmable Controllers (Clau se 8, Zone A & B)
AS/NZS CISPR 11; Industrial Emissions
(1)
Publication 1794-IN122A-EN-P - June 2008 4 PN-25969
Copyright © 2008 Rockwell Automation, Inc. All rights reserved.
Loading...