Tommatech TT400-80PMKB12-250 Installation Manual

The Tommatech TT400-80PMKB12-250 is a high-performance industrial power module designed for robust applications, featuring an 80mm form factor, 250W output, PMBus communication interface, and wide input voltage range. This manual provides essential information for safe installation, configuration, operation, and maintenance of the unit. Below are key sections covering safety precautions, installation steps, specifications, connections, operation, and troubleshooting.

1. Features at a Glance 2. Safety Precautions 3. Installation Steps 4. Specifications 5. Connection Guide 6. Configuration & Operation 7. PMBus Communication 8. Maintenance & Care 9. Regulatory Compliance 10. Troubleshooting

Features at a Glance

Key components: 80mm x 80mm power module, PMBus interface, thermal management system, input/output terminals, status indicators.

FeatureDescription
Form Factor80mm x 80mm compact design
Output Power250W continuous
CommunicationPMBus digital interface
Input VoltageWide range 36-75VDC
Output Voltage12VDC regulated
EfficiencyUp to 94% typical
ProtectionsOver-current, over-voltage, over-temperature
CoolingIntegrated heatsink with forced air option
Status IndicatorsPower Good, Fault, Communication Active
Operating Temp-40°C to +85°C

Safety Precautions

Read all safety instructions before installation. Ensure proper handling and installation procedures.

  1. Disconnect all power sources before installation or maintenance.
  2. Use appropriate personal protective equipment (PPE).
  3. Ensure proper grounding of the unit and system.
  4. Verify voltage ratings match your application requirements.
  5. Install in well-ventilated area to prevent overheating.

WARNING! High voltage present. Risk of electric shock. Install and service by qualified personnel only.

Installation Steps

Follow these steps for proper installation of the TT400-80PMKB12-250 power module.

  1. Unpack and inspect: Check for shipping damage and verify all components.
  2. Mounting: Secure module to chassis using provided M4 screws with proper torque (0.8-1.2 Nm).
  3. Thermal interface: Apply thermal compound if required for heatsink contact.
  4. Electrical connections: Connect input power, output load, and PMBus communication cables.
  5. Cooling: Ensure adequate airflow if using forced air cooling option.
  6. Power up: Apply input power and verify status indicators.

CAUTION! Do not exceed maximum ratings. Ensure proper polarity on all connections.

Specifications

Connection Guide

Proper connection is critical for safe and reliable operation.

TerminalFunctionSpecifications
VIN+Positive input36-75VDC
VIN-Negative input/GroundReturn path
VOUT+Positive output12VDC
VOUT-Negative outputReturn path
PMBusCommunication interfaceSCL, SDA, GND
PGPower Good signalOpen collector
ENABLERemote enable/disableTTL compatible

Tip: Use appropriate wire gauge (minimum 16 AWG for power connections).

Configuration & Operation

Configure the module for optimal performance in your application.

  1. Initial power-up: Verify green POWER LED illuminates.
  2. Output voltage verification: Measure VOUT with calibrated multimeter.
  3. Load testing: Gradually apply load while monitoring temperature.
  4. PMBus configuration: Set output voltage, current limits, OCP/OVP thresholds.
  5. Monitoring: Use PMBus to read temperature, input/output voltages, currents.
  6. Fault response: Configure response to over-temperature, over-current events.

Note: Default settings optimized for typical applications. Adjust as needed.

PMBus Communication

The PMBus interface allows digital control and monitoring of power parameters.

CommandDescriptionRange
VOUT_COMMANDSet output voltage11.5-12.5V
IOUT_OC_FAULT_LIMITOver-current protection15-25A
OT_FAULT_LIMITOver-temperature shutdown80-100°C
READ_VINRead input voltage36-75V
READ_IOUTRead output current0-20.8A
READ_TEMPERATURE_1Read internal temperature-40 to +125°C
STATUS_WORDRead fault status16-bit register

Default Address: 0x5A (7-bit addressing)

Maintenance & Care

Regular maintenance ensures long-term reliability.

  1. Visual inspection: Check for physical damage, loose connections, corrosion.
  2. Cleaning: Use dry compressed air to remove dust from heatsink fins.
  3. Thermal check: Monitor operating temperature; ensure adequate cooling.
  4. Electrical verification: Periodically check input/output voltages.
  5. Firmware updates: Check for latest firmware via Tommatech website.

CAUTION! Disconnect all power before maintenance. Do not use liquid cleaners.

Regulatory Compliance

FCC Part 15: Class B digital device; complies with interference limits for residential use. UL/IEC/EN 60950-1 safety certified. RoHS compliant. Copyright © 2025 Tommatech Technologies; all trademarks property of their respective owners. For technical support, visit www.tommatech.com/support or contact +1-800-555-TOMM.

Troubleshooting

SymptomPossible CauseCorrective Action
No output voltageInput power missingCheck input connections and voltage
Output voltage lowOverload conditionReduce load; check current limit setting
Over-temperature faultInsufficient coolingImprove airflow; check ambient temperature
PMBus communication failureBus issuesCheck SCL/SDA connections; verify address
Intermittent operationLoose connectionsSecure all power and signal connections
Excessive rippleInput filteringAdd input capacitors; check source impedance

Reset Procedure: Disconnect input power for 30 seconds, then reconnect.

Technical Support: +1-800-555-TOMM; [email protected]; www.tommatech.com

Tommatech TT400-80PMKB12-250 Installation Manual © - All Rights Reserved 2025