Figure 17
Interface circuits for nEXT turbo pump controllers
Serial protocol
The serial interface link is set to 9600 Baud, 8 bits, 1 stop, no parity with no handshaking. The
commands are made up from printable ASCII characters. The maximum message size that can
be sent is 80 characters, including start and end characters.
Note:
All alphabecal characters must be sent in upper case format. The response may contain
lower case characters.
Every complete command message sent will receive a response - either a status code or a data
return. The nEXT85 pump can only process with one message at a me. It will only accept a
new message once the response to the previous message has been returned.
B8G0-00-880A - Technical Reference
Page 94
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