Damcos / Danfoss PD661 SP1 P-Net Interface.
Part # 586-3661
The PD 661 Simple P-NET Interface is one of a number of standard modules within the PD 600 series range. Its main purpose is to provide a transparent link between standard RS485 P-NET and the optical Light-Link P-NET used between other PD 600 series modules.
Furthermore, the PD 661 provides a transparent link between Light-Link P-NET and 4-wire P-NET.
The PD 661 is equipped with 2 LEDs, a green (On) to indicate that power is supplied to the module, and a red (Error) to indicate internal errors within the module. The Error LED is ON if an internal error occurs in the device.