Yokogawa Button Operated MV2000 - Manual (Page 65)

2-7 M-4660
Installation and W
iring
1
2
3
4
5
6
7
8
9
10
11
12
13
App
Index
2.3 Optional Terminal Wiring
Wiring to Optional Terminals
WARNING
• To prevent electric shock, make sure that the power source is turned OFF.
• If you are going to apply a voltage of more than 30 VAC or 60 VDC to the
output terminals, use round crimp-on lugs with insulation sleeves on all output
terminals to connect the signal cables so that the wires won’t slip out even if the
screws loosen. Also, use cables that comply with double insulation requirements
(dielectric strength of 2300 VAC or more). For voltages below 30 VAC/ 60 VDC,
use cables that comply with basic insulation requirements (dielectric strength
of 1390 VAC or more). 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 AC power source circuits):
150 V or less
• When the connection is to circuits derived from Mains Circuits (secondary
circuits): 250 V or less
(keep the Mains Circuit voltage at less than 300 V, and use an isolation
transformer.)
• To prevent fire, only use signal cables with a temperature rating of 70°C or
above.
• Exposing the input and output signal cables connected to the MV to high tension
may damage the cables and the MV terminals. Do not stretch the cables to their
limit, and make sure that the terminals are not being pulled on.
• Do not short the transmitter power supply output terminal or apply external
voltage to it. Doing so may damage the MV.
• When using the transmitter power supply output terminal, do not use current that
exceeds the maximum output current (25 mADC). Doing so may damage the
MV.
Note
For remote control wiring, use shielded wires to reduce noise. Connect the shield to the
functional ground terminal or to the ground terminal of the MV.
Wiring Precautions
We recommend that you use crimp-on lugs (designed for 4 mm screws) with
insulation sleeves to connect to the optional terminals.
Crimp-on lug (designed for 4 mm screws) with an insulation sleeve