Safety Stop Function (Standard Model / Ethernet Model) - Mitsubishi Electric 800 Series Instruction Manual

2.6.7 Safety stop function (Standard model / Ethernet
model)
 Function description
The terminals related to the safety stop function are as follows.
Terminal
symbol
*1
Input terminal as the safety stop channel 1.
S1
*1
Input terminal as the safety stop channel 2.
S2
*1
Common terminal for S1 and S2.
PC
Output terminal used for fault detection and fault indication
display.
SO
The terminal is ON (conducted) while no internal safety circuit
*2
failure exists.
SOC Open collector output (terminal SO) common
*1 In the initial status, terminals S1 and PC and terminals S2 and PC are respectively shorted with shorting wires.) To use the safety stop function,
remove all the shorting wires, and then connect to the safety relay module as shown in the connection diagram.
*2 When any fault listed on the next page occurs in the internal safety circuit, the corresponding indication is shown on the operation panel.
NOTE
• Terminal SO can be used to display a fault indication and to prevent restarting of the inverter. The signal output from terminal
SO cannot be used to input a safety stop signal to other devices.
 Connection diagram
To prevent restart at fault occurrence, connect terminals SO and SOC to the reset button, which are the feedback input
terminals of the safety relay module.
RESET
Emergency
stop button
Safety relay module/
Safety programmable controller
*1 To avoid an electric shock hazard, install a magnetic contactor (MC) at the input side of the inverter.
66
2. Installation and Wiring
2.6 Control circuit
Terminal function description
SO
Logic
SOC
+24V
Fuse
PC
CPU
S1
S2
Status of both the circuit between terminals S1 and PC and the
circuit between terminals S2 and PC
Open: Safety stop is activated.
Shorted: Safety stop is not activated
OFF: Internal safety circuit fault
ON: No internal safety circuit fault
FR-E800(-E)
R/L1 S/L2 T/L3
Gate
Driver
CPU
Gate
Driver
*2
*2
∗1
MC
IGBTs
U V W
M