Allen-Bradley 1336T-GT1-SP34B 1336T-LM1EN 74103-015-52A 7410

Product Details

1336T-GT1-SP34B 1336T-LM1EN 74103-015-52A 74101-954-52C Product Description

The Allen-Bradley 1336T-GT1-SP34B is the gate trigger and PWM control board at the heart of the 1336T PLUS II AC drive series. Within a complete industrial automation architecture, this board does not operate in isolation — it is the signal-processing core that bridges the control layer command signals down to the power conversion layer, ensuring precise motor speed and torque regulation across the full drive operating range.

In a typical Rockwell Automation control architecture, the 1336T-GT1-SP34B interfaces directly with the drive's main control logic, receiving velocity and torque references from an upstream Allen-Bradley ControlLogix L7x or CompactLogix L3x PLC via a 1336T-LM1EN DeviceNet/DPI communication module. The communication module translates network-level commands into internal drive parameters, which the 1336T-GT1-SP34B then executes as precise PWM gate signals to the IGBT power bridge. This layered signal flow — from PLC to communication adapter to control board to power stage — is fundamental to achieving deterministic motor control in high-demand production environments.

Power integrity for the 1336T PLUS II drive system is maintained by a dedicated 1336T power supply board (such as the 1336T-SP34A or equivalent frame-matched supply), which provides regulated DC bus voltage to both the control electronics and the gate driver circuits on the 1336T-GT1-SP34B. Stable power delivery is non-negotiable: voltage ripple or transient spikes at the control board level can introduce PWM timing errors, leading to motor torque instability or nuisance drive faults. The 1336T-GT1-SP34B is designed to operate within the tightly regulated power envelope of the 1336T PLUS II chassis, ensuring consistent gate trigger timing across all speed ranges.

At the I/O layer, the drive system integrates with a 1756-IB16 or 1756-OB16 ControlLogix digital I/O module for hardwired interlock signals — including drive enable, fault reset, and run/stop commands — that bypass the network layer for safety-critical functions. Analog speed references may be sourced from a 1756-IF8 analog input module, providing 4–20 mA or 0–10 V speed setpoint signals directly to the drive's reference input. The 1336T-GT1-SP34B processes these analog references alongside network commands, applying configured ramp rates and speed limits before generating the final PWM output.

For HMI integration, operators interact with the 1336T PLUS II drive system through a PanelView Plus 7 terminal connected via EtherNet/IP to the upstream ControlLogix PLC. Drive status, fault codes, output frequency, motor current, and DC bus voltage — all sourced from the 1336T-GT1-SP34B's internal diagnostics — are mapped to PLC tags and displayed in real time on the HMI. This visibility is critical for process engineers monitoring multi-drive conveyor systems, pump stations, or compressor trains where individual drive health directly impacts overall line throughput.

In redundant drive architectures, a standby 1336T PLUS II drive chassis — pre-fitted with a spare 1336T-GT1-SP34B control board — can be maintained in a hot-standby or cold-standby configuration. Rapid board-level replacement, rather than full drive swap, minimizes mean time to repair (MTTR) and reduces spare parts inventory cost. The 1336T-GT1-SP34B's modular design within the 1336T PLUS II chassis supports this maintenance strategy: the board can be replaced without disturbing the drive's wiring, power connections, or parameter configuration stored in the 1336T-LM1EN communication module or external PLC program.

At the protection layer, the 1336T-GT1-SP34B works in conjunction with the drive's thermal management system — including NTC thermistor feedback from the IGBT heatsink — to implement dynamic current limiting and overtemperature shutdown. In applications with high-inertia loads such as centrifugal fans, ball mills, or large pump impellers, the control board's current regulation algorithms prevent nuisance trips during acceleration while maintaining full motor protection during sustained overload conditions. Integration with upstream Allen-Bradley E300 or E3 Plus electronic overload relays provides an additional layer of motor protection independent of the drive's internal fault logic.

For long-term maintenance efficiency, the 1336T-GT1-SP34B supports drive parameter backup via the 1336T-LM1EN module's non-volatile memory or via RSLogix 5000 / Studio 5000 drive configuration files. This ensures that following a board replacement, the drive can be restored to its exact pre-fault configuration — including custom speed profiles, PID tuning parameters, and fault response settings — without requiring a full recommissioning cycle. Paired with a 1203-USB or 1203-SSS serial converter for direct drive parameter access, maintenance teams can perform offline diagnostics and parameter verification before returning the drive to service.

The 1336T-GT1-SP34B serves as a critical replacement and upgrade component across a wide range of industrial sectors where the 1336T PLUS II drive platform remains in active service:

Manufacturing & Assembly Lines: In automotive body shop conveyor systems and parts transfer lines, the 1336T PLUS II drives controlled by the 1336T-GT1-SP34B regulate conveyor belt speed with ±0.1% steady-state accuracy. Precise speed control ensures consistent part positioning for robotic welding and assembly operations, where speed variation directly impacts weld quality and cycle time.

Power Generation & Utilities: In power plant auxiliary systems — including induced draft fans, forced draft fans, and boiler feed pump drives — the 1336T-GT1-SP34B's robust PWM control algorithm maintains stable motor operation across wide load ranges. The board's fault diagnostic capability enables predictive maintenance scheduling, reducing unplanned outages in critical utility infrastructure.

Petrochemical & Refining: Compressor train drives and crude oil transfer pump drives in refinery environments demand continuous, uninterrupted operation. The 1336T-GT1-SP34B's ability to support flying restart and auto-restart functions — configurable via drive parameters — ensures that process pumps and compressors can resume operation automatically following a momentary power interruption, minimizing process upset and product loss.

Water & Wastewater Treatment: Municipal water treatment facilities rely on 1336T PLUS II drives for variable-speed control of raw water intake pumps, aeration blowers, and sludge transfer pumps. The 1336T-GT1-SP34B's precise torque control capability enables energy-efficient pump operation across varying flow demand conditions, supporting both process efficiency and energy cost reduction targets.

Mining & Minerals Processing: In underground mine ventilation systems and surface conveyor drives, the 1336T-GT1-SP34B provides reliable motor control in environments characterized by high ambient dust, vibration, and temperature cycling. The board's robust design and field-proven reliability in harsh industrial environments make it a preferred replacement component for mine maintenance teams managing aging drive fleets.

Packaging & Material Handling: High-speed packaging lines require precise synchronization between multiple drive axes — infeed conveyors, filling stations, labeling units, and case packers. The 1336T-GT1-SP34B, operating within a 1336T PLUS II drive coordinated via DeviceNet through the 1336T-LM1EN module, supports the tight speed coordination required for continuous-motion packaging operations.

Q1: Is the 1336T-GT1-SP34B compatible with all 1336T PLUS II drive frames, and can it be installed without full drive recommissioning? The 1336T-GT1-SP34B is a frame-specific control board designed for the 1336T PLUS II series. Compatibility should be verified against the specific drive frame size and firmware revision using the Rockwell Automation 1336T PLUS II product compatibility matrix. In most cases, replacing the control board does not require full drive recommissioning — drive parameters stored in the communication module (1336T-LM1EN) or backed up to a PLC program are retained and can be reloaded after board replacement. NANKMOS recommends verifying parameter integrity after installation and performing a no-load test run before returning the drive to production service.

Q2: What is the recommended spare parts strategy for 1336T-GT1-SP34B in a multi-drive production environment? For facilities operating five or more 1336T PLUS II drives, NANKMOS recommends maintaining a minimum of one 1336T-GT1-SP34B control board per ten drives as a cold-standby spare. For critical process drives — those controlling pumps, compressors, or conveyors with no bypass capability — a hot-standby spare drive chassis pre-fitted with a 1336T-GT1-SP34B is advisable. All NANKMOS-supplied 1336T-GT1-SP34B boards are covered by a 12-Month Warranty from the date of shipment, with pre-shipment functional testing to verify gate trigger output integrity and communication interface operation.

Q3: How does NANKMOS ensure the quality and long-term reliability of the 1336T-GT1-SP34B before shipment? Every 1336T-GT1-SP34B supplied by NANKMOS undergoes a structured pre-shipment inspection process, including visual inspection for component integrity, functional verification of PWM output signals, and communication interface testing where applicable. Boards are shipped in ESD-protective packaging with individual serial tracking. The 12-Month Warranty covers manufacturing defects and functional failures under normal operating conditions. NANKMOS maintains inventory of 1336T-GT1-SP34B and related 1336T PLUS II components to support rapid dispatch for both planned maintenance and emergency replacement requirements. Contact [email protected] or +86 18359268345 for availability confirmation and lead time.