Safety Stop Function - Mitsubishi Electric A800 Plus Instruction Manual

Control circuit
2.6.8

Safety stop function

Function description
The terminals related to the safety stop function are shown below.
Terminal
symbol
S1 For input of the safety stop channel 1.
∗1
S2 For input of the safety stop channel 2.
∗1
SIC Common terminal for terminals S1 and S2.
∗1
Outputs when an alarm or failure is detected.
So (SO)
The signal is output when no internal safety circuit failure
SOC Open collector output (terminal So (SO)) common
∗1 In the initial status, terminals S1 and PC, S2 and PC, and SIC and SD 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
At an internal safety circuit failure, the operation panel displays one of the faults shown on the next page.
NOTE
• Use terminal So (SO) to output a fault and to prevent restarting of the inverter. The signal cannot be used as safety stop input
terminal to other devices.
Connection diagram
To prevent restart at fault occurrence, connect terminals So (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
54
INSTALLATION AND WIRING
Terminal function description
So (SO)
Logic
SOC
+24 V
Fuse
PC
CPU
S2
S1
SIC
SD
Between S1 and SIC, S2 and SIC
Open: In safety stop mode
Short: Other than the safety stop mode.
OFF: Internal safety circuit failure
exists. ON: No internal safety circuit failure
∗2
Inverter
Gate
ASIC Driver
G
∗2
∗2
R/L1 S/L2 T/L3
IGBTs
Gate
Driver
G
U V W
M