Triac Output - Mitsubishi Electric MELSEC iQ-F Series User Manual

Triac output

Handling of triac output
■Output terminal
Four triac output points are covered by one common terminal. Therefore, each common terminal can drive loads of different
circuit voltages (Example: 100VAC and 200VAC).
Load
Fuse
100VAC
COM1
Load
Fuse
200VAC
COM2
■Circuit insulation
Insulation is provided between the internal circuit and the output element (triac) with photothyristors.
The common blocks are separated from one another.
■Display of operation
The LED turns on and the output triac is turned on when photothyristors are actuated.
■Response time
The response time until the output triac is turned on after the photothyristors are actuated (or shut off) is 1ms or less, and the
response time until the output triac is turned off is 10ms or less.
■Output current
Current of 0.3A can flow per one output point. However, current of four output points should be 0.8A (average of 0.2A per one
point) to suppress temperature rise. When a load with a high rush current is frequently turned on or off, the mean-square
current should be 0.2A or less.
Example
2
4 × 0.02 + 0.4
0.02 + 0.7 + 10
■Open circuit leakage current
C-R absorbers are connected in parallel at the triac output terminal for turning off the triac. Thus, open circuit leakage currents
of 1mA/100VAC or 2mA/200VAC occurs. Since the triac output type has open circuit leakage currents, even after the triac
output is turned off, a small relay and a minute current load with low rated operation currents may continuously operate.
Therefore, the load should be equal to or more than 0.4VA/100VAC or 1.6VA/200VAC. For loads lower than these values,
connect the surge absorbers described later in parallel.
13 WIRING
198
13.6 Output Wiring
Y0
Y1
Y0
Y1
Terminal module
2
× 0.7
= 0.2A
0.02 seconds
0.4A
4A
0.7 seconds 10 seconds