Mitsubishi Electric 800 Series Instruction Manual page 51

Safety stop function
 Wiring precautions
• It is recommended to use a cable of 0.3 to 0.75 mm
• The wiring length should be 30 m (200 m for terminal FM) at the maximum.
• Use two or more parallel micro-signal contacts or twin contacts to prevent contact faults when using contact inputs since
the control circuit input signals are micro-currents.
• To suppress EMI, use shielded or twisted cables for the control circuit terminals and run them away from the main and
power circuits (including the 200 V relay sequence circuit). For the cables connected to the control circuit terminals,
connect their shields to the common terminal of the connected control circuit terminal. When connecting an external
power supply to terminal PC, however, connect the shield of the power supply cable to the negative side of the external power supply. Do not directly earth
(ground) the shield to the enclosure, etc.
• Always apply a voltage to the fault output terminals (A1, B1, C1, A2, B2, C2) via a relay coil, lamp, etc.
 Control logic (sink/source) change
Change the control logic of input signals as necessary.
To change the control logic, change the jumper connector position on the control circuit board.
Connect the jumper connector to the connector pin of the desired control logic.
The control logic of input signals is initially set to the sink logic (SINK) for the FM type.
The control logic of input signals is initially set to the source logic (SOURCE) for the CA type.
(The output signals may be used in either the sink or source logic independently of the jumper connector position.)
 When supplying 24 V external power to the control circuit
Connect a 24 V external power supply across terminals +24 and SD. Connecting a 24 V external power supply enables I/O terminal ON/OFF operation, operation
panel displays, control functions, and communication during communication operation even during power-OFF of inverter's main circuit power supply.
During the 24 V external power supply operation, "EV" blinks on the operation panel.
 Applied 24 V external power specification
Item Rated specification
Input voltage 23 to 25.5 VDC
Input current 1.4 A or less
2.4
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 (SO) The signal is output when no internal safety circuit
failure exists.

SOC Terminal So (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 terminal So (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.
12
WIRING
2
for connection to the control circuit terminals.
Jumper connector
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
Micro signal contacts
SOURCE
SINK
For sink logic


Twin contacts