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Service Network and Alarm/ Warning output
EMD HP variants C, which are equipped with communication electronics and connector
could be connected to a Service Network. The Service Network is a communication protocol
used in EMD HP and other compressed air equipment that allow a remote supervision. Work
data could be regularly read out of the device with a network or they could be read by a data
logger. At the same time, the Service Network could also serve as display and keypad for
setting EMD HP’s parameters at commissioning.
The Service network consists of two devices. These are a slave device which is EMD HP and a
master device. The master device could be a Service Network Reader SN-10.200. It’s a
handheld device that allows user to send command messages manually. It also comprises a
display where answer to command are read. In the table in next page, command message
codes specific to EMD HP are described. There, we see which work data are collected, which
parameters could be set and which remote commands are available in EMD HP.
More detailed description of Service Network Protocol could be found in document
SN-02.000, Service Network Protocol.
An alarm/warning output is included in the service network. Nevertheless, it may be used to
signal alarm condition without being connected to service network. The alarm/warning
output is an open collector output and it shares its GND with serial communication of
Service Network. The output is in high impedance state during alarm. When EMD HP
operates normally, the output is in low impedance state.
