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Allen-Bradley FLEX I/O 1794-OB8EP Installation Instructions Manual
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Allen-Bradley FLEX I/O 1794-OB8EP Installation Instructions Manual

Allen-Bradley FLEX I/O 1794-OB8EP Installation Instructions Manual

24v dc electronically fused 8 output module
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Installation Instructions
(Cat. No. 1794-OB8EP)
This module mounts on a 1794 terminal base unit.
1. Rotate keyswitch (1) on terminal base unit (2) clockwise to position 2
as required for this type of module.
2. Make certain the flexbus connector (3) 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 that the pins on the bottom of the module are straight so
they will align properly with the connector in the terminal base unit.
If you remove or insert the module while the
WARNING
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.
4. Position the module (4) with its alignment bar (5) aligned with the
groove (6) on the terminal base.

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Summary of Contents for Allen-Bradley FLEX I/O 1794-OB8EP

  • Page 1 Installation Instructions (Cat. No. 1794-OB8EP) This module mounts on a 1794 terminal base unit. 1. Rotate keyswitch (1) on terminal base unit (2) clockwise to position 2 as required for this type of module. 2. Make certain the flexbus connector (3) is pushed all the way to the left to connect with the neighboring terminal base/adapter.
  • Page 2 24V dc FLEX I/O Electronically Fused 8 Output Module 5. Press firmly and evenly to seat the module in the terminal base unit. The module is seated when the latching mechanism (7) is locked into the module. Because of the variety of uses for the products described in this publication, those responsible for the application and use of these products must satisfy themselves that all necessary steps have been taken to assure that each application and use meets all performance and safety requirements, including any applicable laws,...

  • Page 3: Environment And Enclosure

    24V dc FLEX I/O Electronically Fused 8 Output Module 3 Identifies information that is critical for successful IMPORTANT application and understanding of the product. 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 IEC publication 60664–1), at altitudes up to 2000 meters without derating.
  • Page 4 24V dc FLEX I/O Electronically Fused 8 Output Module FLEX I/O is grounded through the DIN rail to ATTENTION chassis ground. Use zinc plated, yellow chromated steel DIN rail to assure proper grounding. Using other DIN rail materials (e.g. aluminum, plastic, etc.) which can corrode, oxidize or are poor conductors can result in improper or intermittent platform grounding.
  • Page 5 24V dc FLEX I/O Electronically Fused 8 Output Module 5 If you connect or disconnect wiring while the WARNING fieldside 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.
  • Page 6 24V dc FLEX I/O Electronically Fused 8 Output Module 9 10 11 12 13 14 15 19 20 21 22 23 24 25 26 27 28 29 30 31 32 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 Total current draw through the terminal base unit is...
  • Page 7 24V dc FLEX I/O Electronically Fused 8 Output Module 7 If you connect or disconnect wiring while the WARNING fieldside 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.
  • Page 8 24V dc FLEX I/O Electronically Fused 8 Output Module = Status Indicators ( ) – yellow – show status of individual outputs. = Diagnostic indicators ( ) – red – when lit, indicates fault = Insertable label for writing input designations = Reset button –...
  • Page 9 24V dc FLEX I/O Electronically Fused 8 Output Module 9 If your program automatically checks for fault bits, bits 8 through 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.
  • Page 10 24V dc FLEX I/O Electronically Fused 8 Output Module WARNING AVERTISSEMENT...
  • Page 11 24V dc FLEX I/O Electronically Fused 8 Output Module 11...
  • Page 12 24V dc FLEX I/O Electronically Fused 8 Output Module...
  • Page 13 24V dc FLEX I/O Electronically Fused 8 Output Module 13...
  • Page 14 24V dc FLEX I/O Electronically Fused 8 Output Module IMPORTANT...
  • Page 15 24V dc FLEX I/O Electronically Fused 8 Output Module 15...
  • Page 16 24V dc FLEX I/O Electronically Fused 8 Output Module...