Delta AH500 - Wiring

AH500 Module Manual
2-16
3. The terminal block is removed.
 AH04AD-5A/AH08AD-5B/AH08AD-5C  AH08AD-5A
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.