Allen-Bradley 1794-OB8 FLEX Digital DC Output Modules Instruction Manual

Installation Instructions
Original Instructions

FLEX I/O Digital DC Output Modules

Catalog Numbers 1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P, 1794-OB32P

Summary of Changes

This publication contains the following new or updated information. This list includes substantive updates only and is not intended to reflect all changes.

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.
Activities including 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. If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

Environment and Enclosure

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.

Prevent Electrostatic Discharge

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.

Special Conditions for Safe Use

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
ATTENTION: If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

ATTENTION:

• If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.

• 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.

• 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.

• Use only a soft dry anti-static cloth to wipe down equipment. Do not use any cleaning agents.

WARNING: When you insert or remove the module while backplane power is on, an electric 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 electric 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: If you insert or remove the module while backplane power is on, an electric 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.

UK and European Hazardous Location Approval

Approved for 1794-OB8, 1794-OB8EP, 1794-OB16 and 1794-OB16P modules.
The following applies to products marked II 3 G:

• 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 Schedule 1 of UKEX and Annex II of EU Directive 2014/34/EU. See the UKEx and EU Declaration of Conformity at rok.auto/certifications for details.
• The type of protection is Ex ec IIC T4 Gc (1794-OB8EP) & Ex ec IIC T3 Gc (1794-OB16P) according to EN IEC 60079-0:2018 and EN IEC 60079-7:2015+A1:2018.
• The type of protection is Ex nA IIC T4 Gc (1794-OB8 & OB16) according to EN 60079-0:2009 & EN 60079-15:2010.
• Comply to Standard EN IEC 60079-0:2018 & EN IEC 60079-7:2015+A1:2018 reference certificate number DEMKO 14 ATEX 1342501X and UL22UKEX2378X.
• Comply to Standards: EN 60079-0:2009, EN 60079-15:2010, reference certificate number LCIE 01ATEX6020X.
• 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 UKEX regulation 2016 No. 1107 and ATEX directive 2014/34/EU.

IEC Hazardous Location Approval

The following applies to products marked with IECEx certification (1794-OB8EP & 1794-OB16P):

• 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 to IEC 60079-0.
• The type of protection is Ex ec IIC T4 Gc (1794-OB8EP) & Ex ec IIC T3 Gc (1794-OB16P) according to IEC 60079-0 and IEC 60079-7.
• Comply to Standards IEC 60079-0, Explosive atmospheres Part 0: Equipment – General requirements, Edition 7, Revision Date 2017, IEC 60079-7, 5.1 Edition revision date 2017, Explosive atmospheres – Part 7: Equipment protection by increased safety “e”, reference IECEx certificate number IECEx UL 14.0066X.

WARNING: Special Conditions for Safe Use:

• This equipment shall be mounted in an UKEX/ATEX/IECEx Zone 2 certified enclosure with a minimum ingress protection rating of at least IP54 (in accordance with EN/IEC 60079-0) 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.
• Transient protection shall be provided that is set at a level not exceeding 140% of the peak rated voltage value at the supply terminals to the equipment.
• This equipment must be used only with UKEX/ATEX/IECEx certified Rockwell Automation backplanes.
• Secure any external connections that mate to this equipment by using screws, sliding latches, threaded connectors, or other means provided with this product.
• Do not disconnect equipment unless power has been removed or the area is known to be nonhazardous.
• Earthing is accomplished through mounting of modules on rail.

North American Hazardous Location Approval
The 1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P modules are 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 hazardouslocation 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.

Overview

The FLEX™ I/O Digital DC Output module mounts on a 1794 terminal base.

Install Your Module

1. Rotate the keyswitch (3) on the terminal base (4) clockwise to position 2 as required for this type of module.
2. Make sure the Flexbus connector (1) is pushed all the way to the left to connect with the neighboring terminal base/adapter. You cannot install the module unless the connector is fully extended.
3. Make sure the pins on the bottom of the module are straight so they will align properly with the connector in the terminal base.
4. Position the module (7) with its alignment bar (6) aligned with the groove (5) on the terminal base.
5. Press firmly and evenly to seat the module in the terminal base unit. The module is seated when the latching mechanism (2) is locked into the module.

Connect Wiring for 1794-OB8, 1794-OB8EP, 1794-OB16, and 1794-OB16P

1. Connect individual output wiring to numbered terminals on the 0…15 row (A) as indicated in the table below 1794-OB8 – Terminals 0…7; 1794-OB16 and 1794-OB16P – terminals 0…15; 1794-OB8EP – even numbered terminals 0…14.

2. Connect the associated -V output common to the corresponding terminal on the 16…33 row (B) for each output as indicated in the table below. Commons are internally connected together.
   1794-OB8EP – connect associated output common to odd-numbered terminals on row A or associated terminals on row (B).

3. Connect +V DC power to terminal 34 on the 34…51 row (C).

4. Connect -V DC common to terminal 16 on the 16…33 row (B).

5.  If daisychaining power to the next terminal base, connect a jumper from terminal 51 (+V DC) on this base unit to terminal 34 on the next base unit.

6.  If continuing -V DC common to the next base unit, connect a jumper from terminal 33 (common) on this base unit to terminal 16 on the next base unit.
   Wiring Connections for 1794-OB8, 1794-OB16, and 1794-OB16P
   Used with 1794-TB2, 1794-TB3, or 1794-TB3S Terminal Base Unit

(1) 1794-OB8 – Outputs 0…7; 1794-OB16 and 1794-OB16P – Outputs 0…15
Wiring Connections for 1794-OB8EP

1. 1794-TB2, 1794-TB3,1794 -TB3S – A-1, A-3, A-5, A-7, A-9, A-11, A-13, and A-15 are connected together inside the module to 24V DC common.
2. 1794-TBN – C-1, C-3, C-5, C-7, C-9, C-11, C-13, and C-15 are connected together inside the module to 24V DC common.
   1794-TB2, 1794-TB3, and 1794-TB3S Terminal Base Wiring for 1794-OB8, 1794-OB8EP, 1794-OB16, and 1794-OB16P

Connect -V (Supply Common) to terminal B-16.
Use B-33 and C-51 for daisy-chaining to next terminal base unit.
Total current draw through the terminal base is limited to 10A.
Separate power connections to each terminal base may be necessary.

1794-TBN Terminal Base Wiring for 1794-OB8EP
Connect -V (Supply Common) to terminal B-16.
Connect +V (Supply +Voltage) to terminal C-34.
Use B-33 and C-51 for daisy-chaining to next terminal base unit.
Total current draw through the terminal base is limited to 10A.
Separate power connections to each terminal base may be necessary. Rockwell Automation Publication 1794-IN094E-EN-P – July 2022
Connect Wiring for the 1794-OB32P

1.  Connect individual output wiring (OUT 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 Table 1.
3. Connect the associated output common (-V1) for OUT 0…15 to COM1 (terminal 36, 38, 40, or 42) on the 34…51 row (C).
4. Connect individual output wiring (OUT16…OUT31) to numbered terminals on the 16…33 row (B) as indicated in Table 1.
5. Connect the associated power to the +V2 terminal (43, 45, 47, or 49) on the 34…51 row (C) as indicated in Table 1.
6. Connect the associated output common (-V2) for OUT 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, 37, or 49 (+V2) on this base unit to the power terminal on thenext 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. See the installation instructions for the terminal base unit.

IMPORTANT Total current draw through terminal base connection is limited to 10 A. Separate power connections to each terminal base may be necessary.
Table 1 – Wiring Connections for 1794-OB32P
Used with 1794-TB32 or 1794-TB32S Terminal Base Unit

Connect common to terminals 36, 38, 40, and 42

|

Connect power to terminals 35, 37, 39, and 41

Output 1| A-1
Output 2| A-2
Output 3| A-3
Output 4| A-4
Output 5| A-5
Output 6| A-6
Output 7| A-7
Output 8| A-8
Output 9| A-9
Output 10| A-10
Output 11| A-11
Output 12| A-12
Output 13| A-13
Output 14| A-14
Output 15| A-15
Output 16| B-17|

Connect common to terminals 44, 46, 48, and 50

|

Connect power to terminals 43, 45, 47, and 49

Output 17| B-18
Output 18| B-19
Output 19| B-20
Output 20| B-21
Output 21| B-22
Output 22| B-23
Output 23| B-24
Output 24| B-25
Output 25| B-26
Output 26| B-27
Output 27| B-28
Output 28| B-29
Output 29| B-30
Output 30| B-31
Output 31| B-32

For Outputs 0…15, use +V1 and COM1

For Outputs 16…31, use +V2 and COM2

1794-TB32 and 1794-TB32S Terminal Base Wiring for 1794-OB32P

+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)

Configure the 1794-OB8EP Output Module
Configure your output module by setting bits in the configuration word.
Image Table Memory Map for the 1794-OB8EP Module

Where:
O = Output – O0 corresponds to output 0, 01 corresponds to output 1, and so on.
F = Overload fault bit – 1 = fault present; 0 = no fault
FR = Fault reset bit – 1 = reset output; 0 = no change
(1) The unused lower byte in read word 1 floats during operation. Do not use this byte for fault status. See Program the 1794-OB8EP.

Program the 1794-OB8EP

If your program automatically checks for fault bits, bits 8…15 of read word 1 must be masked. This is a sample program for a module at rack address 1, group 0. Add similar rungs to your program.

Reset a Fault on the 1794-OB8EP – Faults can be reset 3 ways: Press the fault reset button on the front of the module; or toggle the output reset bit (write word 1, bit 08); or cycle backplane power.
Use the Reset Button on the 1794-OB8EP – When you press the reset button, the fault indicator for the faulted output turns off for about 1.2 s. After the delay, the faulted output attempts to turn on. If the external condition causing the fault is corrected, the output will remain on, the fault indicator is off, and the status indicator is on.
Configure the 1794-OB8, 1794-OB16, 1794-OB16P, 1794-OB32P Modules
Configure your output module by setting bits in the configuration word (Word 3).
Image Table Memory Map – 1794-OB8, 1794-OB16, 1794-OB16P, and 1794-OB32 Modules

Write

1794-OB32P only

| O31| O30| O29| O28| O27| O26| O25| O24| O23| O22| O21| O20| O19| O18| O17| O16
Where:| O = Output – O0 corresponds to output 0, 01 corresponds to output 1, and so on.

1794-OB8 uses outputs 0…7; 1 794-OB16 and 1794-OB16P use outputs 0…15; 1794-OB32P uses outputs 0…31.

Specifications

Specifications – 1794-OB8

24V DC

31.2V DC

Output current rating| 4 A (8 outputs @ 0.5 A)
On-state current, output Min, per channel Max, per channel| ****

1.0 mA 500 mA

On-state voltage drop, max| 0.5V DC
Surge current, repeatable every 2 seconds| 2 A for 50 ms
Off-state leakage current, max| 0.5 mA

Isolation voltage

| 50V (continuous), Basic Insulation Type

Tested at 850V DC for 1 s, between user and system No isolation between individual channels

Output signal delay Off to On On to Off| 0.5 ms

1.0 ms

FlexBus current| 60 mA @ 5V DC
Power dissipation, max| 3.3 W @ 31.2V DC
Thermal dissipation, max| 11.2 BTU/hr @ 31.2V DC
Fusing| Module outputs are not fused. Fusing is recommended. If fusing is desired, you must provide external fusing. Use SAN-O MQ4-800 mA fuses.

Specifications – 1794-OB8EP

1794-TB3SK, 1794-TBNK
On-state voltage, output Min Nom Max| 19.2V DC

24V DC

31.2V DC

Output current rating, max per output| 2.0 A
Output current rating, max per module| 10.0 A (8 outputs @ 1.25 A, 5 outputs @ 2.0 A, or similar combinations totaling 10.0 A or less)
On-state current, output Min, per channel Max, per channel| 1.0 mA

2.0 A

On-state voltage drop, max| 0.2V DC
Surge current, repeatable every 3 seconds| 4 A for 50 ms
Off-state leakage current, max| 0.5 mA
Isolation voltage| 50V (continuous), Basic Insulation Type

Tested at 850V DC for 1 s, between field side and system No isolation between individual channels

Output signal delay Off to On On to Off| 0.1 ms

0.1 ms

Specifications – 1794-OB8EP (Continued)

Figure 1 – Surge Current for 1794-OB8EP
Output Minimum Surge Current

Specifications – 1794-OB16 and 1794-OB16P

24V DC

31.2V DC (see Figure 2)

Output current rating| 8.0 A (16 outputs @ 0.5 A)
On-state current, output Min, per channel Max, per channel| ****

1.0 mA 500 mA

On-state voltage drop, max| 0.5V DC
Surge current, repeatable every 2 seconds| 2 A for 50 ms| 1.5 A for 50 ms
Off-state leakage current, max| 0.5 mA

Isolation voltage

| 50V (continuous), Basic Insulation Type

Tested at 850V DC for 1 s between user and system No isolation between individual channels

| 50V (continuous), Basic Insulation Type

Type tested at 2121V DC for 60 s, between field side and system No isolation between individual channels

Output signal delay Off to On On to Off| 0.5 ms

1.0 ms

FlexBus current| 80 mA @ 5V DC| 60 mA @ 5V DC
Power dissipation, max| 5.3 W @ 31.2V DC| 5.0 W @ 31.2V DC
Thermal dissipation, max| 18.1 BTU/hr @ 31.2V DC| 17.0 BTU/hr @ 31.2V DC
Fusing| Module outputs are not fused. Fusing is recommended. If fusing is desired, you must provide external fusing. Use SAN-O MQ4-800mA fuses.| Outputs are electronically protected.

Specifications – 1794-OB32P

On-state voltage, output Min

Nom Max

| 10V DC

24V DC

31.2V DC

Output current rating| 14.0 A max per module (6 A total for channels 0…15; 8 A total for channels 16…31)
On-state current, output Min, per channel

Max, per channel

| ****

1.0 mA 500 mA

On-state voltage drop, max| 0.5V DC
Surge current| 2 A for 50 ms, repeatable every 2 seconds
Off-state leakage current, max| 0.5 mA

Specifications – 1794-OB32P (Continued)

Type tested at 850V DC for 60 s, between field side and system No isolation between individual channels

Output signal delay Off to On On to Off| ****

0.5 ms

1.0 ms

FlexBus current| 80 mA @ 5V DC
Power dissipation, max| 5.3 W @ 32.1V DC
Thermal dissipation, max| 18.1 BTU/hr @ 31.2V DC
Fusing| Outputs are electronically protected.

General Specifications

104 g (3.66 oz.) – 1794-OB8EP

78 g (2.75 oz.) – 1794-OB16

74 g (2.61 oz.) – 1794-OB16P

85 g (2.99 oz.) – 1794-OB32P

** Indicators (field side indication)| 8 yellow status indicators – 1794-OB8, 1794-OB8EP**

8 red fault indicators – 1794-OB8EP

16 yellow status indicators – 1794-OB16, 1794-OB16P

32 yellow status indicators – 1794-OB32P

External DC power supply voltage, nom| 24V DC

External DC power voltage range

| (1794-OB8, 1794-OB16, 1794-OB16P, 1794-OB32P)

10 31.2V DC (includes 5% AC ripple)

(1794-OB8EP)

19.2 31.2V DC (includes 5% AC ripple)

External DC power supply current| 25 mA @ 24V DC (10…35 mA) – 1794-OB8

80 mA @ 24V DC – 1794-OB8EP

49 mA @ 24V DC (20…65 mA) – 1794-OB16

60 mA @ 24V DC (25…75 mA) – 1794-OB16P (see Figure 2)

219 mA @ 24V DC (104 mA @ 10V DC; 278 mA @ 31.2V DC) – 1794-OB32P

North American temp code| T4A – 1794-OB8, 1794-OB8EP, 1794-OB16

T3C – 1794-OB16P, 1794-OB32P

UKEX/ATEX temp code| T4 – 1794-OB8, 1794-OB8EP, 1794-OB16

T3 – 1794-OB16P

IECEx temp code| T4 – 1794-OB8EP

T3 – 1794-OB16P

Keyswitch position| 2
Enclosure type rating| None (open-style)
Wire size| Determined by installed terminal base
Wiring category(1)| 2 – on signal ports

(1) Use this Conductor Category information for planning conductor routing. See the Industrial Automation Wiring and Grounding Guidelines, publication 1770-4.1.
Environmental Specifications

Temperature, operating

| IEC 60068-2-1 (Test Ad, Operating Cold),

IEC 60068-2-2 (Test Bd, Operating Dry Heat),

IEC 60068-2-14 (Test Nb, Operating Thermal Shock):

-20…+55 °C (-4…+131 °F) – 1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P

0…55 °C (32…131 °F) – 1794-OB32P

Temperature, surrounding air, max.| 55 °C (131 °F)

Temperature, nonoperating

| IEC 60068-2-1 (Test Ab, Unpackaged Nonoperating Cold),

IEC 60068-2-2 (Test Bb, Unpackaged Nonoperating Dry Heat),

IEC 60068-2-14 (Test Na, Unpackaged Nonoperating Thermal Shock):

-40…+85 °C (-40…+185 °F)

Relative humidity| IEC 60068-2-30 (Test Db, Unpackaged Damp Heat): 5…95% non- condensing
Vibration| IEC60068-2-6 (Test Fc, Operating):

5 g @ 10…500 Hz

Environmental Specifications (Continued)

Nonoperating 50 g

Emissions| CISPR 11:

Group 1, Class A (with appropriate enclosure)

ESD immunity| IEC 61000-4-2:

6 kV contact discharges 8 kV air discharges

Radiated RF immunity| IEC 61000-4-3:

10V/m with 1 kHz sine-wave 80% AM from 80…6000 MHz

EFT/B immunity

| IEC 61000-4-4:

±2 kV @ 5 kHz on power ports – 1794-OB8, 1794-OB16, 1794-OB32P

±3 kV @ 5 kHz on power ports – 1794-OB8EP, 1794-OB16P

±2 kV @ 5 kHz on signal ports – 1794-OB8, 1794-OB16, 1794-OB32P

±3 kV @ 5 kHz on signal ports – 1794-OB8EP, 1794-OB16P

Surge transient immunity| IEC 61000-4-5:

±1 kV line-line(DM) and ±2 kV line-earth(CM) on signal ports

Conducted RF immunity| IEC 61000-4-6:

10V rms with 1 kHz sine-wave 80% AM from 150 kHz…80 MHz

Certifications

Certifications

(when product is marked) (1)

| Value
---|---

c-UL-us

| 1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P only

UL Listed Industrial Control Equipment, certified for US and Canada. 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 E194810.

1794-OB32P

UL Listed Industrial Control Equipment, certified for US and Canada. See UL File E322657.

UL Listed for Class I, Division 2 Group A,B,C,D Hazardous Locations, certified for U.S. and Canada. See UL File E334470.

UK and CE

| UK Statutory Instrument 2016 No. 1091 and European Union 2014/30/EU EMC Directive, compliant with: EN 61326-1; Meas./Control/Lab., Industrial Requirements

EN 61000-6-2; Industrial Immunity

EN 61131-2; Programmable Controllers EN 61000-6-4; Industrial Emissions

UK Statutory Instrument 2012 No. 3032 and European Union 2011/65/EU RoHS, compliant with: EN 63000; Technical documentation

Ex

| For 1794-OB8EP, 1794-OB16P

UK Statutory Instrument 2016 No. 1107 and European Union 2014/34/EU ATEX Directive, compliant with: EN IEC 60079-0; General Requirements

EN IEC 60079-7; Explosive Atmospheres, Protection “e” II 3 G Ex ec IIC T4 Gc – 1794-OB8EP

II 3 G Ex ec IIC T3 Gc – 1794-OB16P DEMKO 14 ATEX 1342501X UL22UKEX2378X

For 1794-OB8, OB16

European Union 2014/34/EU ATEX Directive, compliant with: EN 60079-0; General Requirements

EN 60079-15; Potentially Explosive Atmospheres, Protection “n” II 3 G Ex nA IIC T4 Gc

LCIE 01ATEX6020X

IECEx

| For 1794-OB8EP, 1794-OB16P

IECEx System, compliant with:

IEC 60079-0; General Requirements

IEC 60079-7; Explosive Atmospheres, Protection “e” Ex ec IIC T4 Gc

Ex ec IIC T3 Gc IECEx UL 14.0066X

CCC

| For 1794-OB8, 1794-OB8EP, 1794-OB16, 1794-OB16P

CNCA-C23-01

CNCA-C23-01 CCC Implementation Rule Explosion-Proof Electrical Products

Morocco|  n° 6404-15
TÜV| 1794-OB8EP, 1794-OB16, 1794-OB16P only

TÜV Certified for Functional Safety: up to and including SIL 2

KC| Korean Registration of Broadcasting and Communications Equipment, compliant with: Article 58-2 of Radio Waves Act, Clause 3
EAC| Russian Customs Union TR CU 020/2011 EMC Technical Regulation
RCM| Australian Radiocommunications Act, compliant with: EN 61000-6-4; Industrial Emissions

Figure 2 – Derating Curve for 1794-OB16P

The area within the curve represents the safe operating range for the module under various conditions of user supplied 24V DC supply voltages and ambient temperatures.
= Normal mounting safe operating range, (includes ).
= Other mounting positions (including inverted horizontal) safe operating
Normal Mounting – Horizontal

Other Mounting (including Vertical, and Inverted Horizontal Mounting)

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