AH500 Module Manual 3. The terminal block is removed. 2.3.3 Wiring Precautions In order to make the functions of an analog-to-digital module perfect and ensure the reliability of a system at the same time, external wiring which prevents noise is necessary. Before installing cables, users need to follow the precautions below. (1) To prevent a surge and induction, an AC cable and input signal cables which are connected to AH04AD-5A/AH08AD-5A/AH08AD-5B/AH08AD-5C must be separate cables. (2) A cable must not be installed near a main circuit, a high-voltage cable, or a cable connected to a load which is not a PLC.
Besides, a cable must not be bound to a main circuit, a high-voltage cable, or a cable connected to a load which is not a PLC. Otherwise, effects that noise, induction, and a surge have will increase. (3) Please connect a shielded cable and a hermetically sealed cable with the ground separately. (4) Terminals with insulation sleeves can not be arranged as a terminal block. It is recommended that the terminals be covered with insulation tubes. (5) Please connect 30 to 24 AWG (0.3 to 0.6 mm) wires to the input/output terminals. The lengths of the plastic jackets which are removed from the cables used should be in the range of 7 mm to 8 mm.
The specifications for the terminals and the wiring of the terminals are shown below. Only copper leads which can resist the heat above 60 ° C can be used. 30-24AWG 0.3-0.6mm (6) Two-wire connection/Three-wire connection/Four-wire connection: Two-wire connection/Three-wire connection (Passive transducer): A transducer and an analog input module are connected to a power circuit collectively. Four-wire connection (Active transducer): A transducer uses an independent power supply. It is not connected to the power circuit which is connected to an analog input module. 2-16 AH04AD-5A/AH08AD-5B/ AH08AD-5C AH08AD-5A