KEYENCE SL-V Series - Manual (Page 110)

4-2
Wirin
g
4
SL-V-M-NO4-E
4-1
Cautions on Wiring and Power Supply
• The two OSSD outputs provided in the SL-V must both be used to establish a safety-related
machine control system. Establishing a safety-related machine control system with just one
of OSSD output cannot be done due to a OSSD output malfunction and results in a signifi-
cant harm to the machine operators, including serious injury or death.
• When using PNP output cable, do not cause short circuit between the OSSD output and +24
V. Otherwise, OSSDs stay ON and causes a dangerous situation.
• When using PNP output cable, be sure to connect the load between the OSSD and 0 V to
avoid a dangerous situation. If the load is incorrectly connected between the OSSD and
+24 V, the logic of OSSD operation will be reversed, and then turn ON when the SL-V
detects the interruption in the detection zone. This is a dangerous situation.
• When using NPN output cables, do not cause short circuit between the OSSD output and 0 V.
Otherwise, OSSDs stay ON and causes a dangerous situation.
• When using NPN output cables, be sure to connect the load between the OSSD and + 24 V
to avoid dangerous situation. If the load is incorrectly connected between the OSSD and 0 V,
the logic of OSSD operation will be reversed, and then OSSD will turn ON when the SL-V
detects the interruption in the detection zone. This is a dangerous situation.
• In case of wiring, regardless of PNP output type cable and NPN output type cable, you must
stay within in the requirements of Clause 9.4.3 in IEC60204-1: 2005 in order for the protec-
tion against maloperation due to earth fault.
• Alert output, AUX output, Clear/Blocked Output, state information output and Interlock-
reset-ready output are not allowed to be used as safety output for safety-related machine
control system. Usage of these functions as safety output could result in the serious injury
or death.
• To avoid the risk of electric shock, do not connect any of the SL-V inputs to DC power
sources outside of the range of 24 V DC +10% or to any AC power source.
• To avoid the risk of electric shock, be sure that the hazardous voltage must be isolated from
all wiring of the SL-V with the reinforced insulation or double insulation.
• Do not install the electric wiring of the SL-V together with or in parallel with the high-voltage
electrical or power lines.
In order to meet the requirements laid out in IEC61496-1, UL61496-1, EN61496-1 and UL508, power
supply for the SL-V must meet the conditions listed below.
• A rated output voltage of 24 V DC (SELV, Overvoltage Category II) within +10% and -20%.
• Double insulation or reinforced insulation between the primary and secondary circuits.
• Output holding time of 20 ms min.
• A power supply must meet the requirements of the electrical safety and electromagnetic com-
patibility (EMC) regulations or standards in all countries and/or regions where the SL-V is used.
• A secondary circuit of power supply (output) must meet the requirements for Class 2 Circuits or
Limited Voltage/Current Circuits specified in UL508, if the SL-V is used in United States or Canada.
If the power supply for the SL-V is shared with the one for the other electronic devices, the
voltage reduction to the SL-V may occur due to the temporary increasing of the current
consumption on these devices, or the SL-V may be affected by the noise generated by these
devices. When these situations occur, the SL-V may go to the lockout condition. It is therefore
strongly recommended that the power supply for the SL-V should be the dedicated use for
itself, the muting device connected to the SL-V and the load for the SL-V and that it should not
be shared with other machines, devices or electronic devices.
Danger
Power supply
Caution