The Allen-Bradley 1756-JMPR, also cataloged as the 1756-JMPR Jumper Bars, operates as a dedicated hardware component for common terminal electrical bridging across 36-pin Removable Terminal Blocks within ControlLogix system enclosures.

Catalog Designation & Part Nomenclature

• 1756: Chassis-based ControlLogix I/O platform hardware family.
• JMPR: Terminal block jumper bar accessory configured for direct signal or power bus commoning.

Hardware Specifications & Physical Parameters

Terminal Interconnects & System Wiring Integration

The jumper bars establish low-resistance electrical connections across adjacent terminals on 36-pin RTB assemblies without consuming backplane bus communication velocity. By simplifying wire routing in high I/O density scaling cabinets, they optimize power distribution across EtherNet/IP deterministic networks nodes without requiring firmware flash compatibility interventions.

Package Order Details

• 25 x Allen-Bradley 1756-JMPR Jumper Bars
• 1 x Product insertion guide sheet

Physical Terminal Assembly Guidelines

• Align the conductive prongs directly with the designated 36-pin terminal block screw channels.
• Press firmly into position before tightening the terminal clamping screws to ensure full metal-to-metal contact.
• Maintain minimum conductor bend radii to prevent stress on adjacent field signal wiring harnesses.
• Verify proper isolation distance between jumpered common buses and adjacent independent field circuits.

Technical Hardware Reference FAQ

• What specific terminal blocks are compatible with these jumper bars?

  They are engineered specifically for 36-pin ControlLogix Removable Terminal Blocks, such as the 1756-TBCH and 1756-TBS6H models.

• Does installing jumper bars affect the module backplane current draw?

  No, they are passive mechanical conductive accessories installed on field wiring blocks and draw zero power from the chassis backplane.

• How many individual jumper bars are included in a single order pack?

  Each standard package contains exactly 25 individual jumper bar pieces.

• Can the jumper bars be cut down to bridge fewer adjacent terminals?

  Modifying the physical length is not recommended as it may compromise structural integrity and electrical contact surface area.

• What is the primary functional purpose of deploying these jumpers?

  They bridge common power or return signals across multiple RTB terminals, reducing redundant external wiring in control panels.

• Do these accessories require firmware or software configuration in Studio 5000?

  No, as physical electrical bridging components, they operate independently of system firmware and programming software.

• Are these jumpers suitable for use in high-vibration industrial environments?

  Yes, when fully seated and secured by the RTB terminal screws, they provide stable mechanical and electrical contacts.

• Can jumper bars be installed while the Removable Terminal Block is connected under power?

  Field wiring circuits must be de-energized prior to inserting or removing jumper bars to prevent electrical shorting or arcing.