Yokogawa Value Series FX1000 - Manual (Page 257)

12-8
IM 04L21B01-01EN
12.5 Optional Terminal Wiring
WARNING
• To prevent electric shock while wiring, make sure that the power supply is turned
off.
• If a voltage of more than 30 VAC or 60 VDC is to be applied to the output
terminals, use ring-tongue crimp-on lugs with insulation sleeves on all terminals
to prevent the signal cables from slipping out when the screws become loose.
Furthermore, use double-insulated cables (dielectric strength of 3000 VAC or
more) for the signal cables on which a voltage of 30 VAC or 60 VDC or more is
to be applied. For all other signal cables, use basic insulated cables (dielectric
strength of 1500 VAC). To prevent electric shock, attach the terminal cover after
wiring and make sure not to touch the terminals.
CAUTION
• Use the following circuit voltages for the connection to the alarm/FAIL/status
output terminal.
• When the connection is to Mains Circuits (primary power supply circuits):
150 V or less
• When the connection is to circuits derived from Mains Circuits (secondary
power supply circuits): 250 V or less
(Keep the Mains Circuit voltage at 300 V or less, and use an isolation
transformer.)
• To prevent fire, use signal cables with a temperature rating of 70°C or more.
• Applying a strong tension to the input and output signal cables connected to
the FX may damage the cables or the FX terminals. To avoid applying tension
directly to the terminals, fix all cables to the rear of the mounting panel.
• Do not short the transmitter power supply output terminal or apply external
voltage to it. Doing so may damage the instrument.
• When using the transmitter power supply output terminal, do not use current that
is equal to or greater than the maximum output current (25 mADC). Doing so
may damage the instrument.
Note
For remote control wiring, use shielded wires to reduce noise. Connect the shield to the
functional ground terminal or the ground terminal of the FX.
Precautions to Be Taken While Wiring
We recommend that you use crimp-on lugs (designed for 3 mm screws) with
insulation sleeves to connect to the optional terminals.
Crimp-on lug (designed for 3 mm screws) with an insulation sleeve
Wiring Procedure
As shown in the figure on the next page, the optional terminal block is located on the rear
panel. The optional terminal block is only available when one of the following options,
which require I/O, is installed in the FX.
Alarm output relay (/A[ ] or /A4A), FAIL/status output relay (/F1), remote control
function (/R1), 24 V transmitter power supply output (/TPS[ ]), pulse input (/PM1),
power monitor (/PWR1), or communication interface (/C3)
Dedicated cover is attached to the optional terminal block.
1. Turn off the recorder and remove the terminal cover.
2. Connect the signal cables to the terminals. The recommended torque for tightening
the screws is 0.5 N•m.
3. Replace the terminal cover.