The Kt 70 is generally low-maintenance, but follow these tips:
| Terminal | Output Type | Connection | |----------|-------------|-------------| | 8 & 9 | Relay (SSR/Contactor) | 8 = NO, 9 = COM | | 8 & 10 | 4-20mA current | 8 (+), 10 (–) | | 8 & 11 | 0-10V voltage | 8 (+), 11 (–) |
A throttle connects to the controller’s throttle input. The Kt 70 will show throttle percentage in real time.
KT 70 REAR CONNECTOR PIN INTERCONNECT (SIMPLIFIED) +---------------------------------------------------------------+ | [Pin 1] Aircraft Power (11-33 VDC) | | [Pin 2] Power Ground | | [Pins A-D, A1-D4] Parallel Gray Code Blind-Mate Inputs | | [Pin 15] Bidirectional ARINC 429 Data Input (Optional) | | [Pin 21] External Mutual Suppression Pulse Line | | [Pin 32] Remote IDENT Switch Input | +---------------------------------------------------------------+ 1. Power and Grounding Kt 70 Installation Manual
Slide the KT 70 unit into the tray until the connector mates. Secure the unit with the front lockdown screw. 4.0 Electrical Wiring and Interfacing
Use the connector pinout diagram provided in the installation manual to ensure each wire is in the correct position.
Fix: Check the VSWR (Voltage Standing Wave Ratio) of the antenna installation. Ensure the coaxial connectors are tightly crimped and there is no water ingress in the antenna base. The Kt 70 is generally low-maintenance, but follow
Ensure the antenna is mounted vertically down when the aircraft is in a normal cruise attitude.
Whether you are replacing an old unit or integrating the Kt 70 into a new process (oven, kiln, HVAC, or plastic extrusion), following the official installation protocol is non-negotiable. This article unpacks every section of the manual, providing clarity on mounting, wiring, sensor configuration, and first-time power-up.
Output LED flashes, but heater stays cold. Solution: Measure voltage at terminals 8&9. If 0V, output triac/relay is dead. Replace unit. If voltage present, external SSR or contactor is faulty. Power and Grounding Slide the KT 70 unit
For runs under 10 feet, RG-400 or RG-142 is recommended. For runs over 10 feet, use low-loss cable like RG-393 or LMR-400 to comply with the maximum allowable signal loss (typically 1.5 dB at 1090 MHz).
Once the unit is mechanically and electrically secured, several checkout procedures are required to ensure compliance with aviation regulations. BendixKing KT-70 | SEAEROSPACE.COM
: Section 3 of the manual details the wiring for the primary connector, power, ground, and external interfaces like the remote IDENT button.
Before signing off the installation logbook, execute the following tests using an approved avionics ramp test set (such as an IFR-6000 or equivalent):
The Bendix King KT 70 installation manual (Part Number 006-00673-0001) provides critical technical specifications for wiring, altitude encoding, and panel mounting to ensure regulatory compliance. Key sections cover installation, system interconnects, and post-installation configuration for the Mode S transponder. For detailed installation documentation, view the manual on Scribd . Kt 70 Transponder Manual