The Pacemaster 6 power module is a unidirectional nonregenerative unit, which can be used for reversing operation by the addition of conventional reversing components. It is offered as a chassis mounted version for users who desire to build their own custom drive system by the addition of magnetic control, logic and protective devices. For a complete packaged 6-pulse drive refer to data sheet DS-PP6.

The Pacemaster 6 is a high performance unit with conservatively rated power components. Pre-conditioned and tested logic semi-conductors, high frequency and transient voltage protection, adjustable current limit and solid state motor overload protection assist in providing reliability of the system and protection for driven equipment.

• AUTOMATIC PHASE-LOCKED LOOP SYNCHRONIZING CIRCUIT provides enhanced immunity to noise.
• ISOLATED FEEDBACK - Armature voltage and current feedback signals are isolated from the AC power source.
• DIRECT LINE OPERATION - No isolation transformer required
• USER SELECTOR SWITCHES to provide a quick choice of:
  -- Armature voltage or tachometer feedback
  -- AC or DC tachometer
  -- Internal or external torque control
  -- Jog Accel/Decel rates
  -- 50 or 60 Hz operation
• SEPARATE POTENTIOMETER BOARD allows replacement of main regulator board without user readjustment of:
  -- Acceleration
  -- Deceleration
  -- Minimum speed
  -- Maximum speed
  -- Jog speed
  -- Tach calibration
  -- IR compensation
  -- Current limit
  -- Current gain
  -- Speed compensation
  -- Speed gain

• ARMATURE VOLTAGE OVERRIDE upon Tach loss.
• PHASE SEQUENCE INSENSITIVITY allows operation irrespective of AC input phase connection order.
• TEMPERATURE COMPENSATED REFERENCE.
• NEMA POWER CODE C - Six SCR full wave power converter for smooth high efficiency operation.
• SOLID STATE MOTOR OVERLOAD with inverse time function.
• HEAT-SINK THERMOSTAT helps protect SCRs from over-temperature.
• CONTROL CIRCUIT RELAYS help protect against automatic restart of equipment after return of interrupted AC incoming power.
• CURRENT SURGE PROTECTION (di/dt) - Ferrite core inductors provided in the DC line to limit the effects of potentially damaging current surges.
• VOLTAGE TRANSIENT PROTECTION (dv/dt) - Built-in surge suppressors and R-C network ("Snubber") for protection from momentary AC line and DC load transients.
• MEMORY TYPE FAULT DETECTOR with LED INDICATORS to disable the drive and aid in diagnostics of:
  -- Motor overload
  -- Tachometer Overspeed
  -- Armature over-voltage
  -- Tachometer loss
  -- Instantaneous over-current
  -- Field excitation loss
  -- Heat sink over-temperature
  -- Phase loss/Low line
• Operates without damage to components during line voltage drops of 25%, and while connected to badly "notched" or noisy AC power lines.