Protrol IPS2 24 VDC, Manual, Page: 8 / 25

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4.3 System and service interfaces
The IPS2 unit has a system interface for RTU communication and a service interface for handling of
transient fault recorder data.
A hardware and a protocol configuration must be made to switch between the two different interfaces.
Hardware configuration is made with a jumper on a 3-pole header , see the coming chapter “ IPS2 24 VDC
Main Printed Circuit Board Rev. ” for details.
The device protocol is switched by pressing and holding the ACK button until the changed mode is indicated
by a short flash on the
I>
or
I
0
>
LED.
System interface
The physical port for the system interface is the RS485 port (X5), see the chapter “ Schematic Overview ” for
connector placement.
The jumper in the 3-pole header must be placed in position 2 – 3 for RS485 communication.
The device protocol is switched by pressing and holding the ACK button until the changed mode is indicated
by a short flash on the
I
0
>
LED.
The device is always initiated, after a power down or reset, with the system interface protocol activated.
Service interface
The physical port for the service interface is the internal RS232 port , see chapter “ IPS2 24 VDC Main Printed
Circuit Board Rev. ” for details.
The jumper in the 3-pole header must be placed in position 1 – 2 for RS232 communication.
The device protocol is switched by pressing and holding the ACK button until the changed mode is indicated
by a short flash on the
I>
LED.
Please observe that the IPS2 is always initiated, after a power down or reset, with the system interface
protocol activated.