• Motor: 1/2HP with high-starting torque and thermal overload protection
• Ball bearings on drive shafts are permanently lubricated and sealed
• Clutch: Adjustable Friction
• Drive reduction: First stage is an automatically tensioned heavy-duty V-belt and second stage #48 chain and sprocket
• 14T drive sprocket, #41 chain
• Door sprocket: 32T sectional or 48T rolling
• Brake: Solenoid-actuated mechanical disc brake system
• Programmable B2, C2, D1, E1, T, TS operational modes
• Mechanical limits with metal limit nuts
• Photo-eyes included
• 3-Button O/C/S station included
• 24V NEC class 2 control
• NEMA 1 enclosure
• Left or right-hand mounting
• Emergency disconnect 16' sash chain & keeper for manual operation
• Radio Control: Onboard or external terminals for 3-wire radio system
• Warranty: 2-year/20,000 cycle limited
• Door Speed: approx 8-9 in/s
• Weight: Shipping weight approx 65 lbs.

Item Number: MDJ-50-11

Product Manual: MDJ-50-11 Manual

Product Brochure: Commercial Door Operator Sell Sheet

Entrapment Protection Device: Guardian Compatibility

Reversing the Motor Direction: Tutorial

Installation Information: Infographic

SPROCKET OPTIONS

• 41B14T 14T sprocket, 1" bore
• 41B32T 32T sprocket, 1" bore, sectional doors (std)
• 41B18T 18T sprocket, 1" bore
• 41B48T 48T sprocket, 1" bore, rolling door (std)
• 41B32T-125 32T srocket, 1.25" bore, sectional doors
• 41B48T-125 48T sprocket, 1.25" bore, rolling doors

Note: 1/4' keyway standard on all sprockets

OPTIONAL CONTROLS & ACCESSORIES

• RC41-X #41 Roller chain (ft.)
• SASH-X Sash-chain disconnect (ft.)
• RCC41 Connecting link, #41 roller chain
• RCH41 Half link, #41 roller chain
• HMB Hood mounting bracket
• GUARD-D Drive belt cover
• GUARD-L Limit sprocket cover
• SPREADER-1.1 Chain spreader bar, 1"-1"
• SPREADER -1-1.25 Chain spreader bar, 1"-1 1/4"
• HMB Hood mounting bracket

CONTROL SYSTEM

• LCD on logic board for easy programming
• On-board open/close/stop buttons make testing simple
• Monitored entrapment capability
• Programmable timer-to-close

RADIO CONTROLS

• Guardian radio control receiver on-board with O/C/S programming capability
• Co-ax antenna connector on board
• Connection terminals for a 3-wire radio control system
• Compatible with 3-button controls for open/close/stop operation

ENTRAPMENT PROTECTION OPTIONS

• C-201-N4: Guardian Photo-eyes, extended adjustable brackets in NEMA 4 enclosure
• GUAT-201: Guardian Commercial Photo-eyes
• E3JM: Omron, Photocell, thru beam
• MEL-11-K110: Miller Edge Wireless Door Edge Kit, Receiver & Transmitter, Monitored
• MEL-11-TX10: Miller Edge, Wireless Door Edge Transmitter, Monitored, EDGE LINK II
• MLC-k72: Miller Edge, monitored light curtain, 6 ft., 16 elements
• 32NO: Air Switch, 2-wire
• 32SPDT: Air Switch, 3-wire
• 4/20/2002: Coil Cord, 18/2/20, 12', 20' extended

Note: Any Normally Open (NO) dry contact signal ancillary device or accessory is compatible with the Guardian MDH/MDJ/MDT Operator Circuity.