Thanks Eric,
We mostly use LG contactors/overloads here. I havent seen them coming suppression or otherwise, but'ill check that possibilty too.
But what about the life of the RELAY contact within the PLC????
Now, if you look at the technical specs. for S7-200 (relay types) it mentions that;
RELAY
Lifetime - Mechanical (no load) 10,000,000 open/close cycles
Lifetime contacts at rated load 100,000 open/close cycles
Assuming the above is expected life span of the contact, I calculate that
@ 1 click of relay contact per minute
= 60 open/close per hour,
= 960 per day (in two 8 hour shifts)
= 24,000 per month
= in four months, I can use the Relay unit with peace of mind!!! after that .........
am I going wrong somewhere??
I first tried attaching a JPEG image @ 150dpi, now lets try a BMP file.
Thanks again.
We mostly use LG contactors/overloads here. I havent seen them coming suppression or otherwise, but'ill check that possibilty too.
But what about the life of the RELAY contact within the PLC????
Now, if you look at the technical specs. for S7-200 (relay types) it mentions that;
RELAY
Lifetime - Mechanical (no load) 10,000,000 open/close cycles
Lifetime contacts at rated load 100,000 open/close cycles
Assuming the above is expected life span of the contact, I calculate that
@ 1 click of relay contact per minute
= 60 open/close per hour,
= 960 per day (in two 8 hour shifts)
= 24,000 per month
= in four months, I can use the Relay unit with peace of mind!!! after that .........
am I going wrong somewhere??
I first tried attaching a JPEG image @ 150dpi, now lets try a BMP file.
Thanks again.