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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 the
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/ Safety programmable controller/ Safety
controller compliant with ISO13849-1 safety category 3 or higher shall be used in conjunction with
the FR-A800-LC inverter (refer to
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
Terminal name
symbol
Safety stop input
S1
(Channel 1)
Safety stop input
S2
(Channel 2)
SIC
Common terminal
Open collector output
So (SO)
common
Safety monitor output
SOC
terminal common
∗1 Specifications for conforming to safety standards.
∗2 ON: The transistor is conducted. OFF: The transistor is not conducted.
page
12). In addition, all other components in the safety stop loop
Chapter 4 TEST AND CHECKING
Table 4 Safety related terminals
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)
FAILURE.
∗2
Input resistance: 4.7 kΩ
Input current : 4 to 6 mADC
(In case of 24 VDC input)
Load: 24 VDC / 0.1 A max.
Voltage drop: 3.4 V max.
(In case of 'ON' state)
INSTALLATION AND WIRING
Rating
∗1
5
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