Thermo Fisher Scientific
Prima PRO & Sentinel PRO Mass Spectrometers User Guide
D-1
Appendix D
Local I/O
The Prima PRO has a number of channels of both serial I/O and
discrete I/O built in to the instrument to allow connection to external
equipment.
Refer to the instrument specific installation drawing for location and
connection details of all local I/O. Note that connection details and
the location of the interface are different for safe area (inside the
instrument enclosure) and Ex systems (flameproof box or boxes).
Five channels of serial I/O are available.
One channel marked HOST is specifically for connection to a PC
running GasWorks software.
The other four, channels I/O 0 through I/O 3, are available for
communication to external expansion I/O systems (where I/O
requirements cannot be accommodated by the onboard I/O described
below), a plant DCS, or other external data gathering or control
equipment.
A number of protocols are available for communication to the latter
items, including Modbus and simple ASCII data logging. Other
(optional) protocols (e.g. Profibus) are implemented using third-party
converters, typically converting from Modbus RTU to the required
protocol. Converters for fibre optic data communication are also
available as options (see below).
Individual serial channels can be configured as RS232, RS422 (i.e.
full duplex) or RS485 (i.e. half duplex, not available for the HOST
link) by jumpers on the I/O CPU board. See table below.
Introduction
Serial I/O
Serial Link Type
Selection
