Installation Instructions Original Instructions FLEX I/O 220V AC Digital Input and Output Modules Catalog Numbers 1794-IM8, 1794-OM8 Topic Page Important User Information Environment and Enclosure North American Hazardous Location Approval Prevent Electrostatic Discharge Installing Your 220V AC Digital Input or Output Module...
FLEX I/O 220V AC Digital Input and Output Modules 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.
FLEX I/O 220V AC Digital Input and Output Modules 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.
FLEX I/O 220V AC Digital Input and Output Modules North American Hazardous Location Approval The following modules are North American Hazardous Location approved: 1794-IM8, 1794-OM8 The Following Information Applies When Informations sur l’utilisation de cet équipement en Operating This Equipment In Hazardous Locations.
FLEX I/O 220V AC Digital Input and Output Modules 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. •...
Page 6
FLEX I/O 220V AC Digital Input and Output Modules 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.
FLEX I/O 220V AC Digital Input and Output Modules Installing Your 220V AC Digital Input or Output Module Description Description Keyswitch Alignment bar Terminal base Groove Flexbus connector Latching mechanism Module The module mounts on a 1794 terminal base. ATTENTION: During mounting of all devices, be sure that all debris (metal chips, wire strands, etc.) is kept from falling into the module.
Page 8
1794-OM8 table. 2. 1794-IM8 – Connect the associated 220V AC L1 power lead of the input device to the corresponding odd-numbered terminal (C-1, 3, 5, 7, 9, 11, 13, or 15) on row (C) for each input as indicated in the...
Page 9
FLEX I/O 220V AC Digital Input and Output Modules Wiring Connections for 1794-IM8 and 1794-OM8 1794-IM8 1794-OM8 1794-TBN 1794-TBN, 1794-TBNF Input Input Terminal 220V AC Supply Output Output Terminal Common Input 0 Output 0 Input 1 Output 1 Input 2...
FLEX I/O 220V AC Digital Input and Output Modules 1794-TBN Terminal Base Wiring for 1794-IM8 and 1794-OM8 Even Numbered I/O Terminals 0 thru 14 Odd Numbered I/O Terminals 1 thru 15 (1794-TBN shown) L1 = 220V AC power - Connect to terminal C-34...
Page 11
FLEX I/O 220V AC Digital Input and Output Modules Set the Input Filter Time for the 1794-IM8 Module To select your input filter time (FT) for channels 00...07, set the corresponding bits in the output image table (complementary word) for the module.
FLEX I/O 220V AC Digital Input and Output Modules Specifications Specifications – 220V AC Input Module 1794-IM8 Attribute Value Number of inputs 8, nonisolated Recommended terminal base unit 1794-TBN, 1794-TBNK Module mounting Derating Curve for 1794-IM8 On-state voltage, min 159V AC...
Page 13
FLEX I/O 220V AC Digital Input and Output Modules Specifications – 220V AC Output Module 1794-OM8 Attribute Value Number of outputs 8, nonisolated Recommended terminal base unit 1794-TBN, 1794-TBNF, 1794-TBNK, 1794-TBNFK Module mounting Derating Curve for 1794-OM8 Output voltage, min 159V AC Output voltage, nom 240V AC...
Page 14
FLEX I/O 220V AC Digital Input and Output Modules General Specifications Attribute 1794-IM8 1794-OM8 Terminal base screw torque Determined by installed terminal base Dimensions, approx. (H x W x D) 94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.)
Page 15
FLEX I/O 220V AC Digital Input and Output Modules Environmental Specifications Attribute Value IEC 60068-2-30 (Test Db, unpackaged damp heat): Relative humidity 5…95% noncondensing IEC60068-2-6 (Test Fc, operating): Vibration 5 g @ 10...500 Hz IEC60068-2-27 (Test Ea, unpackaged shock): Shock, operating 30 g IEC60068-2-27 (Test Ea, unpackaged shock): Shock, nonoperating...
Page 16
FLEX I/O 220V AC Digital Input and Output Modules Certifications Certifications (When Product Value is Marked) 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. c-UL-us and Canada.
FLEX I/O 220V AC Digital Input and Output Modules Derating Curves Derating Curve for 1794-IM8 V in On–state oltage (V AC) Temperature o C Ambient The area within the curve represents the safe operating range for the module under various conditions of user supplied 220V AC supply voltages and ambient temperatures.
Page 18
FLEX I/O 220V AC Digital Input and Output Modules Notes: Rockwell Automation Publication 1794-IN104C-EN-P - July 2018...
Page 19
FLEX I/O 220V AC Digital Input and Output Modules Rockwell Automation Support Use the following resources to access support information. Knowledgebase Articles, How-to Videos, Technical Support www.rockwellautomation.com/ FAQs, Chat, User Forums, and Product knowledgebase Center Notification Updates. Local Technical www.rockwellautomation.com/global/ Support Phone Locate the phone number for your country.
Page 20
Rockwell Automation maintains current product environmental information on its website at http://www.rockwellautomation.com/rockwellautomation/about-us/sustainability-ethics/product-environmental-compliance.page. Allen-Bradley, Rockwell Automation, FLEX I/O, Rockwell Software, and TechConnect are trademarks of Rockwell Automation, Inc. Trademarks not belonging to Rockwell Automation are property of their respective companies. Rockwell Otomasyon Ticaret A.Ş., Kar Plaza İş Merkezi E Blok Kat:6 34752 İçerenköy, İstanbul, Tel: +90 (216) 5698400...
Need help?
Do you have a question about the 1794-IM8 and is the answer not in the manual?
Questions and answers