Middle Atlantic MPR Master/slave Jumper - JMS-12X6

Middle Atlantic JMS-12X6 MPR Master/Slave Power Jumper

Overview

The Middle Atlantic JMS-12X6 is a 1-foot master/slave power jumper designed for use with Middle Atlantic MPR power distribution units. Sold in a pack of six, it allows multiple MPR units to be linked together so a single switched outlet controls downstream PDUs — a clean alternative to running separate control wiring across a rack. If you're building out a multi-PDU rack that needs coordinated power switching, the JMS-12X6 (often searched as JMS 12X6) is the correct connecting hardware for that topology.

Each jumper measures 12 inches in depth and ships in a six-piece package, giving you enough stock to wire a fully populated rack or keep spares on hand for future expansion. The package ships at approximately 1 lb, so freight impact is negligible even on multi-pack orders.

Key Features

• 1 ft (0.3 m) cord length: Sized for adjacent rack-unit connections. PDUs mounted in consecutive rack positions connect without excess cable drape — keeps the rear of the cabinet manageable and avoids the strain-relief headaches that come with oversized jumpers.
• Six-pack quantity (JMS-12X6): A single order covers the full master/slave chain in a typical multi-PDU rack build. Buying by the six-pack also hedges against field replacements — a failed jumper in a live rack can take down downstream PDU switching, so having a spare on the shelf matters.
• Middle Atlantic MPR compatibility: Engineered specifically for the MPR PDU family. Using the correct OEM jumper avoids pin-mismatch or mechanical fit issues that generic alternatives can introduce in production rack builds.

Compatibility

The JMS-12X6 is designed for Middle Atlantic MPR series power distribution units. Verify your specific MPR model's master/slave port configuration against Middle Atlantic's current documentation before ordering. This jumper is a rack power accessory — it does not supply, condition, or protect power on its own. If you are specifying a full rack power distribution solution, review the MPR PDU lineup for outlet count, switching capability, and load capacity first, then add jumpers to match the number of linked units.

What's in the Box

• 6x Middle Atlantic JMS-12X6 MPR Master/Slave Jumper (1 ft each)

Frequently Asked Questions

Q: What is the JMS-12X6 used for?

A: The JMS-12X6 is a master/slave power jumper for Middle Atlantic MPR power distribution units. It links multiple MPR PDUs so that one switched outlet can control downstream units in a rack chain.

Q: How many jumpers come in the JMS-12X6 package?

A: The JMS-12X6 ships as a 6-pack — six 1-foot jumper cords per order.

Q: What is the cord length on the JMS-12X6?

A: Each jumper is 1 foot (0.3 m) long, sized for rack-adjacent MPR unit connections.

Q: Will the JMS-12X6 work with non-Middle Atlantic PDUs?

A: The JMS-12X6 is engineered specifically for the Middle Atlantic MPR PDU family. Compatibility with third-party PDUs is not documented by the manufacturer — verify before use.

Q: What does the JMS-12X6 weigh for shipping purposes?

A: The six-pack ships at approximately 1 lb (0.5 kg), so freight impact on a larger rack order is minimal.

Ted Perry

The JMS-12X6 is one of those parts that gets overlooked at the spec stage and then causes a field delay when it's not on the truck. At 1 foot per jumper and six per pack, this is purpose-built for connecting adjacent MPR units in the same rack — and the six-pack quantity is the right way to stock it if you're commissioning a multi-PDU rack in a single visit.

Technical Highlights:

• 1 ft cord length: Matches the physical spacing of rack-mounted MPR units in adjacent rack units — no excess slack accumulating behind the PDU tray.
• 6-pack packaging: A full six-unit chain requires five jumpers; the pack of six covers the chain plus one spare — the right buy quantity for a single rack build.
• MPR-native fit: OEM connector spec means no guesswork on pin assignment or mechanical engagement, which matters in a live rack where a loose jumper drops master/slave switching silently.

Deployment Considerations:

• Order the JMS-12X6 at the same time as the MPR units — waiting to source jumpers separately after rack delivery is a common cause of commissioning delays on multi-PDU installs.
• The 1 ft length is sized for adjacent-unit connections only; if your MPR units are separated by blank panels or other equipment, you will need a longer jumper — verify rack layout before finalizing the order.

The JMS-12X6 is the correct stocking item for system integrators building out Middle Atlantic MPR-based rack power in command centers, security head-end rooms, or AV equipment racks where coordinated PDU switching is part of the design.