Mitsubishi Electronics FX1S Figure 6.2: Dummy load, Table 6.2: Relay Life Cycle Data

FX1S Series Programmable Controllers Outputs 6
6-3
6.1.1 Reliability Tests
The test results in Table 6.2 were gathered from a 1 sec ON/OFF test cycle. Please note that
the over current induced by in-rush greatly reduces the relay contacts service life. The rated life
for an inductive AC load such as a contactor or solenoid valve is 500,000 operations at 20VA.
6.1.2 Response Times
OFF times increase as the load current decreases.
For improved response times use a 'dummy' resistor, see Figure 6.2. If a response time of 0.2
msec or better is required when using 'light loads' use a 'dummy' resistor and ensure the signal
line has a current greater than 60mA/24V DC.
Figure 6.2: Dummy load
Table 6.2: Relay Life Cycle Data
Description 20VA 35VA 80VA
Load capacity 0.2A/100VAC
0.1A/200VAC 0.35A/100V AC 0.17A/240V AC 0.8A/100V AC 0.4A/240V AC
Life of contact (cycles) 3,000,000 1,000,000 200,000
Example load (Mitsubishi contactor) S-K10 ~ S-K95 S-K100 ~ S-K150 S-K180,S-K400
5 to 24V
Y
+V
Dummy load Lo ad
10 to 100mA