Requirements for the OT or DT Terminal

• If a copper cable is used, use copper wiring terminals.
• If a copper-clad aluminum cable is used, use copper wiring terminals.
• If an aluminum alloy cable is used, use copper-aluminum transition wiring terminals, or aluminum wiring terminals along with copper-aluminum transition spacers.

• Do not connect aluminum wiring terminals to the AC terminal block. Otherwise the electrochemical corrosion will occur and affect the reliability of cable connections.
• Comply with the IEC61238-1 requirements when using copper-aluminum transition wiring terminals, or aluminum wiring terminals along with copper-aluminum transition spacers.
• If copper-aluminum transition spacers are used, pay attention to the front and rear sides. Ensure that the aluminum sides of spacers are in contact with aluminum wiring terminals, and copper sides of spacers are in contact with the AC terminal block.

Figure D-1 Requirements for the OT/DT terminal

Crimping an OT or DT Terminal

• Pay attention not to scratch the core wire when stripping a cable.
• The cavity formed after the conductor crimp strip of the OT or DT terminal is crimped must wrap the core wires completely. The core wires must contact the OT or DT terminal closely.
• Wrap the wire crimping area with a heat shrink tubing or PVC insulation tape. The heat shrink tubing is used as an example.
• When using a heat gun, protect devices from being scorched.

Figure D-2 Crimping an OT terminal

(1) Cable	(2) Core	(3) Heat shrink tubing
(4) OT terminal	(5) Hydraulic pliers	(6) Heat gun

Figure D-3 Crimping a DT terminal

(1) Core	(2) Cable	(3) Heat shrink tubing
(4) DT terminal	(5) Hydraulic pliers	(6) Heat gun