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GENERAL DESCRIPTION
Features
The safety stop function of the Mitsubishi Electric FR-A800-LC inverter can be used to prevent the inverter from
supplying rotational energy to motors. Dual input terminals S1 and S2 can be used to cut off the gate-drive power
to the IGBT.
RESET
Emergency
stop button
Safety relay module
/ Safety programmable controller
Warning
Disconnecting the power to the gate driver by the safety stop function does not isolate electrically
between the inverter and the motor. To avoid an electric shock hazard, disconnect power to the
inverter and verify that the main circuit capacitor voltage is zero (across terminals P and N) before
performing any work on the motor (refer to your inverter's Instruction Manual for discharging time).
Standards
The safety stop function of the Mitsubishi FR-A800-LC inverter meets the following standards and categories.
• FR-A840-LC
• Safety Integrity Level (SIL) 2
ISO13849-1:2008 Category 3/PLd
IEC62061:2005 / IEC61800-5-2:2007 / IEC61508 SIL2
IEC60204-1:2010 / IEC61800-5-2:2007 Stop category 0
• FR-A870-LC
• Safety Integrity Level (SIL) 2
ISO13849-1:2008 Category 3/PLd
IEC62061:2005 / IEC61800-5-2:2007 / IEC61508 SIL2
IEC60204-1:2010 / IEC61800-5-2:2007 Stop category 0
• Safety Integrity Level (SIL) 3
ISO13849-1:2015 Category 3/PLe
IEC62061:2015 / IEC61800-5-2:2016 /IEC61508:2010 SIL3
IEC60204-1:2016 / IEC61800-5-2:2016 Stop category 0
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GENERAL DESCRIPTION
So (SO)
SOC
+24V
Fuse
PC
24VDC
S2
S1
SIC
SD
/ Safety controller
Figure 1 FR-A800-LC safety stop function diagram
FR-A800-LC
Logic
ASIC
CPU
R/L1 S/L2 T/L3
IGBTs
Gate
Gate
Driver
Driver
G
G
U V W
M
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