4) Connect the ground and buzzer wires. Splicing will be necessary on the buzzer wire.
Provide a “drip loop” on the cable when possible.
NOTE: In high humidity or damp environments Artex recommends sealing the connector with RTV after system has been tested. This helps prevent water intrusion from the back shell through the connector receptacle pins.
Figure 9 - ME406P Connector (Front View of ELT)
Pin 9
Pin 1
Pin 8
Pin 15
Figure 10 - Remote Switch Wiring
Figure 11 - Wiring Diagram: Metal Airframe
Figure 12 - Wiring Diagram: Metal Airframe
Figure 13 - Wiring Diagram: Composite Airframe
Figure 14 - Wiring Diagram: Composite Airframe
2.7.4 Connect RF Coaxial Cable
The BNC to BNC cable provided carries both the 121.5 MHz and 406 MHz outputs. The ME406Pwas certified using a 6 foot (1.8M) RG-142 (MIL-C-17) coax cable. Maximum cable loss should not exceed 1 dB. In all cases the coax must meet or exceed RG-142 specifications. Contact ARTEX if other lengths of coax are required for your installation. If low loss cable is required, see paragraph 2.7.5.1, Low Loss Coax Cable (Optional).
Precautions when working with coaxial cable:
. Never kink coaxial cable.
. Never drop anything on coaxial cable.
. Never step on coaxial cable.
. Never bend coaxial cable sharply.
. Never loop coaxial cable tighter than the allowable bend radius. Industry rule-of-thumb:
Bend radius ≥ 6 x Cable diameter
. Never pull on coaxial cable except in a straight line.
. Never use coaxial cable for a handle, lean on it, or to hang things on it (or any other wire).
The coax cable should not cross any production breaks (major structural sections) in the aircraft so that in the event of a crash the ELT and the antenna are in same aircraft section. This usually requires placing the antenna directly above the ELT unit. Do not bundle the ELT antenna coax with any other VHF radio coax, power harness or the ELT remote switch harness.
2.7.5 Coax Cable Assembly (Optional)
Although various coax cable lengths are available from Artex, you may fabricate your own cable. Use RG-142 (or equivalent) coax. Appropriate BNC connectors must be used. If using RG-142, the applicable BCN connector is Artex P/N 150-2118 which is commercially available from Kings (KC 59-162) or Amphenol (P/N 31-4427 or M39012/16-0503). For these connectors, Artex recommends the Kings Crimp Tool P/N KTH-1000 with the KTH-2001 die. Kings may be contacted in the US at phone 803-909-5000.
Other commercially available connectors and tools may be available.
2.7.5.1 Low Loss Coax Cable (Optional)
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