Hi, I know there is a similar question already running but I have the same problem with different parameters? We are probably on the same course. I am on 1st year HNC and need a PLC for the following parameters: I have spent all day with no joy
I need
PLC power supply 240v, 50Hz and 110v, 50Hz
No. of relay outputs, 4 max rating 1mA each
No. of transistor, triac or thyristor outputs - 1
No. of contact closure inputs - 6
No. of 3 line proximity devices - 1 (unknown rating)
No. of analogue inputs - 1 0-10v dc
RS 232 or similar interface
Required memory 2k
Scan time better than 50ms
IP67 standard protection and external ambient temp -40C ( think we need anticondensation heaters in the enclosure for this?)
The PLC is housed close to a high frequency source of magnetic interference.
One output drives a contactor to switch a heating element of 240v, 20 A rating. Suggest the type of contactor and will the PLC be able to control the contactor coil directly?
Any help/direction is greatly appreciated
I need
PLC power supply 240v, 50Hz and 110v, 50Hz
No. of relay outputs, 4 max rating 1mA each
No. of transistor, triac or thyristor outputs - 1
No. of contact closure inputs - 6
No. of 3 line proximity devices - 1 (unknown rating)
No. of analogue inputs - 1 0-10v dc
RS 232 or similar interface
Required memory 2k
Scan time better than 50ms
IP67 standard protection and external ambient temp -40C ( think we need anticondensation heaters in the enclosure for this?)
The PLC is housed close to a high frequency source of magnetic interference.
One output drives a contactor to switch a heating element of 240v, 20 A rating. Suggest the type of contactor and will the PLC be able to control the contactor coil directly?
Any help/direction is greatly appreciated