Allen-Bradley 1336-L6/B Control Interface – 9 Input 115V AC Logic Board

Allen-Bradley 1336-L6/B Control Interface – 9 Input 115V AC Logic Board

The Allen-Bradley 1336-L6/B is a Control Interface Board designed as an option module for the Bulletin 1336 Adjustable Frequency AC Drive family. This logic interface board serves a specific and practical purpose: it converts the drive‘s standard 24V DC control input level to a 115V AC interface, allowing standard push buttons, relay contacts, and legacy control circuits to interface directly with the drive without requiring intermediate relay panels . The 1336-L6/B is compatible with 1336 PLUS, PLUS II, IMPACT, and FORCE drive platforms across their full power range of 0.5 to 600 horsepower (0.37 to 448 kW) .

The 1336-L6/B mounts directly onto the drive’s main control board, positioned beneath the programming and display board, and connects to external control wiring through Terminal Block 3 (TB3) . The board provides nine discrete control inputs, each of which can be assigned a specific function through the drive‘s programming parameters—functions such as Start, Stop, Jog, Forward, Ramp, Local, and Enable can all be mapped as needed . This programmable flexibility eliminates the need for rewiring when control scheme changes are required.

Manufactured by Allen-Bradley (Rockwell Automation) and designated as Series B (1336-L6/B), this board is now discontinued by the manufacturer but remains a critical spare for facilities operating legacy 1336 drive systems . The 1336-L6/B features conformal coating for protection against moisture and chemical contaminants, ensuring reliable operation in demanding industrial environments .

Allen-Bradley 1336-L6/B Control Interface – 9 Input 115V AC Logic Board

 

Technical Specifications

Parameter Name Parameter Value
Product Model 1336-L6/B (1336-L6)
Manufacturer Allen-Bradley / Rockwell Automation
Product Type Control Interface Board (Logic Interface Board)
Compatible Drive Families 1336 PLUS, PLUS II, IMPACT, FORCE
Input Voltage 115V AC (nominal)
High-State Trigger Range 90–115V AC (±10%)
Low-State Maximum 30V AC
Low-State Leakage Current ≤10 mA into 6.5 kΩ load
Control Inputs 9 (programmable function assignment)
Encoder Feedback Not supported
Terminal Block TB3
Board Protection Conformal Coating
Operating Temperature 0 to 40°C (32 to 104°F)
Relative Humidity 5 to 95%, non-condensing
Mounting Location Main control board (beneath programming/display board)
Product Lifecycle Status Discontinued / Obsolete

 

Main Features and Advantages

115V AC Interface Conversion: The 1336-L6/B primary function is converting the drive‘s control input level from 24V DC to 115V AC, enabling direct connection of standard push buttons, selector switches, and relay contacts without intermediary relays . This simplifies control panel wiring and reduces component count in legacy systems where 115V AC control circuits are already installed.

Nine Programmable Control Inputs: The 1336-L6/B provides nine discrete inputs, each assignable through drive programming to functions including Start, Stop, Jog, Forward, Ramp, Local, Enable, and others . This programmable flexibility allows control scheme modifications without physical rewiring, reducing downtime during system changes.

Conformal Coating Protection: The 1336-L6/B board is conformally coated to protect against moisture, chemical contaminants, and environmental hazards common in industrial settings . This protection extends board life in harsh operating conditions where bare PCBs would be vulnerable.

Direct PLC Compatibility: The 1336-L6/B is compatible with Allen-Bradley 1771 series PLC I/O modules including 1771-OA, 1771-OAD, 1771-OW, and 1771-OWN, enabling direct integration with legacy PLC-5 and SLC control systems .

Scroll to Top