text: <s>[INST] PF525 Alternatives....PF4 or PF40? Summary: Lead time issues with PF525 After selling a job with PF525's (due to their Ethernet IP capability) and placing the order, I am now informed of a 4 week lead time on PF525's. So, what are my alternatives? PF4 or PF40 with a COMM-E? I've never used this combination. I have 6, 2HP drives. do I need a COMM-E for each drive, or one for the whole lot? [/INST] John, there are multiple possibilities, it really depends what is needed by your application. Ethernet/IP option card is only available on PF40 / PF40P Sensorless Vector Control is only available on PF40 / PF40P Safe Torque Off is only available on PF40P (option) Closed Loop Speed Regulation is only available on PF40P Needed Power (2HP) is available for PF4M / PF4 / PF40 / PF40P About the Ethernet/IP connection, you can also have only one drive connected using the optional comm card, and then connect up to 4 other drives to it using modbus RTU, that is available for all PF4x family.... be aware that it isn't the same solution, about control possibilities and performances. - fuzzy logic In order to enhance the reputation of the Forum's contributors, please rate the replies you got and remember to close the thread clicking Choose as Best Answer button over the solving answer. Thanks ! \\n </s>