EP-528T Series 2

EP-528T Series 2 amplifier-converter unit

EP-528T Series 2 is an aircraft amplifier-converter unit used in automatic temperature control systems of aircraft air-conditioning systems. The unit receives electrical signals from temperature sensors and setting devices, amplifies and converts these signals, and generates control commands for actuators and air-conditioning valves. It is used as part of temperature regulators installed on civil and transport aircraft, where stable cabin, cockpit or cargo compartment temperature control is required. The unit belongs to aircraft technical equipment and operates as an electromechanical / electronic control block in the environmental control system.

Signal processing function of EP-528T Series 2

The EP-528T Series 2 processes input signals from temperature sensors and temperature setting units. Typical associated components may include P-109 temperature sensors and RR-53-4T setting devices, depending on the regulator configuration. The unit compares the received signal with the selected temperature setting and forms an output command for the air-conditioning control system. These commands are then sent to actuators, dampers or valves that regulate airflow and temperature. In this role, EP-528T Series 2 works as the control and signal-conversion element inside an automatic temperature regulation loop.

EP-528T Series 2 in RTA temperature regulators

The EP-528T Series 2 is used in temperature regulators such as RTA-36-27T, RTA-36-30T and RTA-36-9T. These regulators operate in aircraft air-conditioning and pressurization-related systems, where different temperature control channels may be required for cockpit, cabin, cargo compartment or air supply circuits. The amplifier-converter unit supports automatic regulation by converting sensor and selector signals into commands for system actuators. Depending on the aircraft, several EP-528T Series 2 units may be installed in different technical compartments, each serving a separate temperature control circuit.

Application of EP-528T Series 2 on transport aircraft

EP-528T Series 2 is used on aircraft including Il-76, Il-86 and Il-96-300, depending on system configuration and documentation. On Il-76 aircraft, EP-528T Series 2 units may be installed in groups in technical compartments and equipment racks. Some units work in air bleed and cooling control circuits, others operate in cold air duct or smooth pressurization and air-conditioning circuits, and another unit may support automatic temperature control in the occupied cargo compartment area. Exact quantity and location depend on aircraft modification and installed air-conditioning system.

Installation of EP-528T Series 2 in aircraft compartments

The EP-528T Series 2 is installed as a closed control unit in aircraft technical areas, usually on electrical or radio equipment racks. On Il-76 examples, blocks are referenced in the fifth technical compartment near frame 68, in the first technical compartment near frame 14, and on the cargo compartment ceiling around frames 4–5. The units are installed in vibration-protected mounting frames or shock-absorbing supports to protect them from aircraft vibration. Installation, wiring and connector assignment must be carried out according to the aircraft maintenance documentation and wiring diagrams.

Identification and ordering of EP-528T Series 2

The unit may be referenced as EP-528T Series 2, EP-528T Ser. 2, ЭП-528Т серия 2 or ЭП-528Т сер. 2. When ordering, it is important to specify the series because aircraft control units may have different versions and applicability. For correct supply, the customer should confirm the aircraft type, regulator type, required condition, connector configuration, documentation availability and whether the unit is needed for operational replacement, repair stock or bench testing. Since the block works in automatic temperature control circuits, acceptance should include external condition, documentation and electrical test status where required.

Product Type: Aircraft amplifier-converter unit / control block
Designation: EP-528T Series 2
Alternative Designations: EP-528T Ser. 2, ЭП-528Т серия 2, ЭП-528Т сер. 2
Function: Signal amplification, conversion and command generation for automatic temperature control
Application / Where Used: Aircraft air-conditioning and automatic temperature regulation systems
System / Installation Area: Environmental control system / air-conditioning system technical compartments
Compatible Aircraft / Equipment: Il-76, Il-86, Il-96-300 and other aircraft with compatible temperature regulation systems
Associated Regulators: RTA-36-27T, RTA-36-30T, RTA-36-9T and related configurations
Associated Sensors: P-109 temperature sensors or compatible temperature sensing elements
Associated Setting Devices: RR-53-4T or compatible temperature selectors
Associated Actuators / Valves: Air-conditioning dampers and actuators, including 5419T where applicable
Power Supply: 27 V DC
Permitted DC Network Range: 24–29.4 V
Power Consumption: Not more than 35 W
Input Signals: Analog electrical signals from platinum temperature sensors and temperature setting devices
Output Signals: DC control signals for air-conditioning actuators and damper mechanisms
Operating Temperature Range: −60 °C to +60 °C
Construction: Closed metal protective housing with electrical connectors
Installation Method: Mounting on equipment racks in vibration-protected frames / shock-absorbing supports
Length: 285 mm
Width: 122 mm
Height: 188 mm
Weight: Not more than 3.8 kg
Condition: As applicable
Technical Documentation: Passport, operating documentation, wiring diagrams, aircraft maintenance documentation, regulator system documentation

All shipments are carried out from our international warehouse in Dubai (UAE), as well as from our partners’ remote warehouses.

In Stock — items available in stock at the Dubai warehouse are dispatched within 5–10 business days after receiving 100% prepayment.

Remote Stock — items available at our partners’ remote warehouses are supplied within an average of 30–45 business days after receiving 100% prepayment.

Pre-Order — made-to-order products are manufactured and delivered within an average of 45–60 business days. Payment terms: 50% advance payment to start production, with the remaining 50% paid before dispatch from the Dubai warehouse after full readiness for shipment.

Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.