AS300 Series Module Manual 2.2.7 Wiring Precautions To ensure the analog-to-digital module functions well and reliably, the external wiring must prevent noise. Before you install the cables, follow the precautions below. _2 (1) To prevent a surge and induction, the AC cable and the input signal cables that are connected to the module must be separate cables. (2) Do not install the cable near a main circuit, a high-voltage cable, or a cable connected to a load that is not a PLC. In addition, the 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. (3) Ground shielded cables and hermetically sealed cables separately.
(4) Terminals with insulation sleeves cannot be arranged as a terminal block, so you should cover the terminals with insulation tubes. (5) Use single-core cables or twin-core cables in a diameter of 24 AWG–22 AWG with pin-type connectors smaller than 1 mm. Use only copper conducting wires that can resist temperatures above 60° C-75° C. 24-22AWG 8-10mm (6) Notes on two-wire, three-wire, and four-wire connections: Two-wire connection/three-wire connection (passive transducer): connect the transducer and the analog input module to the same power circuit. Four-wire connection (active transducer):
the transducer uses an independent power supply so do not connect it to the same power circuit as the analog input module. (7) Note: use cables with the same length (less than 200 m) and use wire resistance of less than 100 ohm. 2-20