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Wiring
2.3.7 Safety stop function
(1) Description of the function
The terminals related to the safety stop function are shown below.
∗1 In the initial status, terminals S1 and S2 are shorted with terminal PC by shortening wire. Remove the shortening wire and connect the safety relay module
when using the safety stop function.
∗2 Inverter running (RUN signal) is assigned to the terminal Y0 in the initial status.
∗3 To use the SAFE signal, set "80 (positive logic) or 180 (negative logic)" in any of Pr.190 to Pr.192 or Pr.313 to Pr.315 (Output terminal function selection) to assign
the function. ( Refer to Chapter 5 of the Instruction Manual (Applied))
∗4 To use the SAFE 2 signal, set "81 (positive logic) or 181 (negative logic)" to any of Pr.190 to Pr.192 or Pr.313 to Pr.315 (Output terminal function selection) to
assign the function. ( Refer to Chapter 5 of the Instruction Manual (Applied))
∗5 At an internal safety circuit failure, one of E.SAF, E.6, E.7, and E.CPU is displayed on the operation panel.
(2) Wiring connection diagram
To prevent restart at fault occurrence, connect terminals Y0 (SAFE 2 signal) and SE to terminals XS0 and XS1, which
are the feedback input terminals of the safety relay module.
By setting
Pr. 190 RX2 (terminal Y0) function selection
= "81 (SAFE2 signal)", terminal RUN is turned OFF at fault occurrence.
Terminal Symbol Description
S1
∗1
For input of safety stop channel 1.
Between S1 and PC / S2 and PC
Open: In safety stop state.
Short: Other than safety stop state.
S2
∗1
For input of safety stop channel 2.
PC
∗1
Common terminal for terminal S1 and S2.
Y0 or virtual
terminal of CC-Link
communication
∗2
SAFE
signal
∗3
Outputs the safety stop status.
The signal is output when inverter output is shut off
due to the safety stop function.
OFF: Drive enabled or drive stop (at an internal
safety circuit failure
∗5)
ON: Drive stop (no internal safety circuit failure
∗5)
SAFE2
signal
∗4
Outputs when an alarm or failure is detected.
The signal is output when no internal safety circuit
failure
∗5 exists.
OFF: Internal safety circuit failure
∗5
ON : No internal safety circuit failure∗5
SE Common terminal for open collector outputs (terminal Y0)
NOTE
y Hold the ON or OFF status for 2ms or longer to input signal to terminal S1 or S2. Signal input shorter than 2ms is not
recognized.
y Use SAFE signal to monitor safety stop status. SAFE signal cannot be used as safety stop input signal to other
devices (other than the safety relay module).
y SAFE 2 signal can only be used to output an alarm or to prevent restart of an inverter. The signal cannot be used as
safety stop input signal to other devices.
NOTE
y Changing the terminal assignment of SAFE or SAFE2 signal using Pr. 190 RX2 (terminal Y0) function selection may affect
the other functions. Set parameters after confirming the function of terminal Y0.
S2
S1
START/RESET
+24V
K1
K2
DC24V
Y0 (SAFE2) *1
R S T
U V W
IM
SE
PC
MITSUBISHI MELSEC Safety relay module
QS90SR2SN-Q
Internal
Safety
Circuit
Emergency
stop button
Inverter
I/O control
Output shutoff
circuit
X0 X1
COM0
COM1
24G
XS0
XS1
Z10
Z00
Z20
Z11 Z01 Z21
*1 Output signals differ by the setting of Pr. 190 RX2
(terminal Y0) function selection.