Mitsubishi Electric 800 Series Instruction Manual page 6

Warning
 To avoid an electric shock hazard, insert the magnetic contactor (MC) between power source and
inverter.
 Open the contact of MC and keep away from the inverter for discharging time (refer to your inverter's
Instruction Manual for information) before performing any work on the inverter. And verify that the
voltage on the bus capacitors has discharged before measuring the DC bus voltage between
terminals P(+) and N(-) or at test points (refer to your inverter's Instruction Manual for locations). The
voltage must be zero.
Caution
 In order to meet safety standards, a safety relay module compliant with ISO13849-1 safety category 3
or higher shall be used in conjunction with the FR-A800/F800 inverter (refer to
all other components in the safety stop loop shall be 'safety approved' types.
 To avoid system faults, check the safety stop function at least once per year.
To comply with SIL 3, the safety stop function must be checked at least once in three months.
Also, check the safety stop function at system installation, any software changes, and parameter
setting changes. For details, refer to
●Wiring
The safety related terminals are described in Table 4 and Table 5.
Terminal
Common
symbol
S1
SIC
S2
SIC -
So (SO) SOC
SOC -
 Specifications for conforming to safety standards.
 ON: The transistor is conducted. OFF: The transistor is not conducted.
6
INSTALLATION AND WIRING
Chapter 4 TEST AND CHECKING
Table 4 Safety related terminals
Terminal name
Safety stop input
(Channel 1)
Safety stop input
(Channel 2)
Safety stop input
terminal common
Safety monitor output
(open collector output)
Safety monitor output
terminal common
Terminal function description
For input of safety stop channel 1
Between S1 and SIC
OFF: In safety stop mode
ON: Other than the safety stop mode
For input of safety stop channel 2
Between S2 and SIC
OFF: In safety stop mode
ON: Other than the safety stop mode
Common terminal for terminal S1 and
terminal S2
For output for failure detection and
alarm
(Open collector output)
Between So (SO) and SOC
OFF: Failure or alarm detected
ON: No failure detected
Note: Terminal SO (SO) cannot be
used for safety signals in a
safety system. Use terminal
SO (SO) to output a fault and
to prevent restarting of the
inverter.
Common terminal for terminal So
(SO)
page 11). In addition,
FAILURE.
Rating
 
Input resistance: 4.7 kΩ,
input current: 4 to 6 mADC
(with 24 VDC input)
-
Permissible load: 24
VDC (27 VDC at
maximum), 0.1 A
(The voltage drop is
3.4 V at maximum
while the signal is ON.)
-