Safety Circuit Performance (61Ii) - Horizon Fitness APC-61 Manual

7-16. Safety Circuit Performance
Half-Second Circuit on Cutting Buttons
1. The condenser charges electricity when either S10 or S11 cutting button is not pressed.
2. When eiher button is pressed, the condenser starts to discharge electricity through resistance.
3. When the other button is pressed within 0.5 second (while the electricity to start the relay still
exists in the condenser), Ry3 is turned on, and keeps on as long as both buttons are pressed.
Ry3 Ry3
Ry1
Ry2
Ry1 100 4.7k
220
Ry2
Ry3 Ry1
Cutting Buttons
Half-Second Circuit
Photo Area Guard (Area Sensor) Circuit
Recommended area sensor circuit which fulfills
the safety standard of category IV
Safety Relay Ry4 and Ry5 operate depending
on the status of area sensor.
The status of the relay is sent to the area sensor
to detect if there are any failure on the relay.
S11 S10
Ry2
Photo Area Guard Circuit
Knife and Paper Clamp Control Circuit
Raising and lowering of a knife and paper clamp are controlled
by this control circuit.
1. When Ry3 turns on, the paper clamp lowering valve turns ON.
2. After a certain period of time, the knife lowering valve turns on.
3. When the knife lower limit sensor is turned on, the both knife and
paper clamp lowering valves turn off.
4. The knife raising valve turns on.
5. The knife upper limit sensor is turned on, and the knife raising valve turns off.
6. The paper clamp raising valve turns on.
7. The paper clamp upper limit is turned on and the paper clamp raising valve turns off.
If either Ry3, Ry4 or Ry5 is turned off, the lowering valve cannot be
turned on regardless of the command from the control circuit.
Ry4
Ry5
Photo Area Guard Circuit
(Area Sensor)
Ry4 Ry5
(Area Sensor)
7-19
Ry4
Ry5
Ry3
Control Circuit
Y13 Y11
Y12 Y10
Paper Clamp Knife
Paper Clamp
Lowering Valve Raising
Raising Valve
Valve
Paper Clamp
Knife Control
Control Circuit
Circuit
Knife
Lowering
Valve
404007
7_16_1A