Mitsubishi Electric A800 Instruction Manual page 49

Safety stop function
3.4
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.

S2 For input of the safety stop channel 2.

SIC Common terminal for terminals S1 and S2.

Outputs when an alarm or failure is detected.
SO The signal is output when no internal safety circuit
failure exists.

SOC Terminal SO ( open collector output ) common

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
shortning wires, and then connect to the safety relay module as shown in the following connection diagram.

At an internal safety circuit failure, the operation panel displays one of the faults shown on the next page.
NOTE
• Use the terminal SO to output a fault and to prevent restarting of the inverter. The signal cannot be used as safety stop input signal to other devices.
 Connection diagram
To prevent automatic restart after a fault occurrence, connect the reset button of a safety relay module or a safety programmable controller across the terminals
SO and SOC. The reset button acts as the feedback input for the safety relay module or the safety programmable controller.
RESET
Emergency
stop button
 Safety stop function operation
Input Internal safety
power circuit status
OFF ―
Normal
Normal
Normal
Normal
ON
Fault
Fault
Fault
Fault

ON: The transistor is conducted. OFF: The transistor is not conducted.

When not using the safety stop function, short across terminals S1 and PC, S2 and PC, and SIC and SD to use the inverter. (In the initial status, terminals S1 and PC,
S2 and PC, and SIC and SD are respectively shorted with shorting wires.)
12
WIRING
Terminal function description
Open between S1 and SIC, and between S2 and SIC:
In safety stop mode.
Short: Other than the safety stop mode.
OFF: Internal safety circuit failure
ON: No internal safety circuit failure
SO
SOC
PC
24VDC
S2
S1
SIC
SD
Safety relay module
/ Safety programmable controller
Input terminal ,
 
S1 S2
― ―
ON ON
ON OFF
OFF ON
OFF OFF
ON ON
ON OFF
OFF ON
OFF OFF


Inverter
Logic
+24V
Fuse
CPU
Output terminal
Inverter running status
SO
OFF Output shutoff (Safe state)
ON Drive enabled

OFF Output shutoff (Safe state)

OFF Output shutoff (Safe state)

ON Output shutoff (Safe state)

OFF Output shutoff (Safe state)
OFF Output shutoff (Safe state)
OFF Output shutoff (Safe state)
OFF Output shutoff (Safe state)
R/L1 S/L2 T/L3
IGBTs
Gate Gate
ASIC
Driver
Driver
G G
U V W
M
Operation panel indication
E.SAF

Not displayed
Not displayed
Displayed
Displayed
Not displayed
Displayed
Displayed
Displayed
Displayed
SA

Not displayed
Not displayed
Displayed
Displayed
Displayed
Not displayed

Displayed
Displayed
Displayed