A4-9
IM 34M06H62-02E 2nd Edition : June 2008-00
(4) We recommend using crimp contact (for 3.5mm screw) with insulating sleeve to
connect a signal wire to a terminal.
Table A4.4 Connection Method and Recommended Terminal Block Type
Wire Type Shielded twist-pair wire
Wire’s Rated Temperature 75°C min.
Wire Connection Method Using solderless terminal
Solderless terminals
and compatible wire
size
Manufacturer
Model Compatible Wire Size
Japan Solderless Terminal Mfg Co., Ltd. V1.25-M3
AWG22 to 18
(0.33 to 0.82 mm
2
)
(Copper wire)
Nippon Tanshi Co., Ltd. RAV1.25-3.5
Japan Solderless Terminal Mfg Co., Ltd. V1.25-M4
Japan Solderless Terminal Mfg Co., Ltd. V2-M4
AWG16 to 14
(1.3 to 2.1 mm
2
)
(Copper wire)
Crimping Torque 0.8 Nm (7.1 lbf
in)
(5) If you have an open collector driving an auxiliary relay or other inductive load,
install a diode close to and parallel to the load to eliminate sparks, as shown in
Figure A4.6.
Figure A4.6 Surge Suppressor
If you configure an output terminal as an open collector and have it drive an auxiliary relay
or other inductive load, install a surge suppressor as described above. If the output
terminal is subjected to a surge voltage exceeding the maximum allowable rating of the
output circuit, the circuit may be damaged permanently.
(6) If you have an open collector driving a solid state relay (SSR), install a bleeder
resistor across the SSR terminals. The resistance should be determined, taking
into consideration the off leakage current of the output terminal and the SSR's
recovery voltage. For instance, if the SSR's recovery voltage is 1 V or more, the
resistance of the bleeder resistor should be 10 k (= 1 V/0.1 mA) or less.
If you configure an output terminal as an open collector and have it drive an SSR, install a
bleeder resistor as described above. Note that the SSR may fail to turn off depending on
the OFF-leakage current, the resistance of the bleeder resistor and the SSR's recovery
voltage. For details, see the user's manual for the SSR.
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