The HTR module is a 3U, 12HP plug-in, in charge to to simulate 4 independent heater interfaces
Each HTR output circuit is redirected by a dedicated relay to a Nominal I/F or to a Redundant I/F: in this way each HTR Plug-In grants the capability to simulate four cold-redounded HTR circuits.

The HTR module can deliver a constant output or a programmable and periodic Pulse Width Modulation activation.

The plug-in module architecture follows the generic architecture compatible with the Power I/F Box

• 4 independent channels x module
• Each Channel has nominal & redundant I/F
• Monitoring of current and voltage
• Load dumping at turn-off
• Programmable PWM activation (e.g.)
  • 4s repetition cycle
  • 16s repetition cycle

• Settable output protections
  • Overvoltage protection
  • Undervoltage protection
  • Reverse current protection
• Thermal protection of the high-power stages
• Synchronization with external trigger
• Compliant to ECSS-E-ST-50-14C