Wiring The Contact Signals; Wiring The Sensor; Wiring The Communication - YOKOGAWA FLXA402 User Manual

2.2.4

Wiring the contact signals

Contact outputs
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The FLXA402 unit's four contacts (switches) that can be wired and configured to suit user
requirements. Contact S4 is programmed as a fail-safe contact. Refer to the User's Manual IM
12A01F01-02EN for contact outputs setup.
Use a cable with the rated voltage of 300 V AC or higher and with the electric current capacity
according to the load connected to contact output.
Contact inputs
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It is necessary to use screening/shielding on the input signal cables. For details, refer to the
User's Manual IM 12A01F01-02EN.
2.2.5 Wiring the mA-input/ output signals
mA-input signals
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The mA-inputs receive current signals of 4-20 mA. Should be used the cable beyond 30 V AC.
It is necessary to use screening/shielding on the input signal cables.
For details, refer to the User's Manual IM 12A01F01-02EN.
mA-output signals
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The output signals consist of current signals of 4-20 mA. The maximum load can be 600 ohms on
each. Should be used the cable beyond 30 V AC. It is necessary to use screening/shielding on
the output signal cables. For details, refer to the User's Manual IM 12A01F01-02EN.
2.2.6

Wiring the sensor

The FLXA402 can be used with a wide range of commercially available sensor types, both from
Yokogawa and other manufacturers.
Terminal screw size is M3, and torque of screw up is 0.6 N•m.
Pin terminal, ring terminal and spade terminal can be used.
For details, refer to the User's Manual IM 12A01F01-02EN.
2.2.7

Wiring the communication

The FLXA402 can equip Ethernet (Modbus TCP/IP) communication, RS-485 (Modbus RTU)
communication.
It is necessary to use screening/shielding on the communication cable.
For details, refer to the User's Manual IM 12A01F01-02EN
CAUTION
Do not tighten up four front panel screws one by one.
Each front panel screw should be tightened up in two times of screwing. And, firstly the screw
at the upper left should be screwed a bit, the next is at the lower right, third is at the upper right,
and fourth is at the lower left. The second round is the same sequence again to tighten up four
screws.
Do not use an electric screwdriver with high revolutions. If an electric screwdriver is used for
these front panel screws, the revolutions of the electric screwdriver should be less than 400 rpm.
Four screws should be tightened to the following torque; 1.5 to 1.6 N•m
<Start-up and Safety Precautions>
IM 12A01F01-01EN
14
2nd Edition : Apr. 19, 2019-00