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IM-ENG-116/GB
7.3 Connections and mounting
The Mux2700 HSM module is a plug-in unit intended for insertion in a suitable H.I.S. Termination Board.
Therefore, the primary electrical connections (supply, field connection, serial lines) are made at the Termination
Board level. Please refer to the relevant board instruction manual for details.
The Mux2700 box – unlike other HiD-type enclosures – is not mechanically polarised because its different connec-
tors avoid the possibility of wrongly inserting it in an isolator slot. No polarisation prong is therefore to be found on
the bottom of the enclosure.
To mount a new Mux2700 module on the board, proceeds as follow:
•
identify the right Mux2700 slot by consulting the relevant documentation;
•
carefully align the unit connectors with the board ones, then gently press down module;
•
push down the yellow tabs on each side of the module to firmly secure it to the panel.
To remove an installed Mux2700, simply lift the yellow tabs and gently unplug from the panel.
The Mux2700 Multiplexer is an hot plug-in capable module therefore, when required, you can mount it without
disconnecting the power from the relevant Termination Board. At plug-in time, no relevant disturbance is to be
expected on 4/20 mA field signals. Before powering up the unit for the first time, please remember to carefully
check supply voltage level and polarity.
When required, “tag labels” are available to be inserted on the transparent lid located at the top of the module. This
could be useful for general identification purposes.
Mux 1700 note:
The Mux2700 Multiplexer module is a fully functional replacement for the earlier Mux1700 module. The Mux2700
can be fitted to any Termination Board designed to accept the Mux1700 by the usage of the proper mounting adap-
ter, plugged onto the existing MUX2700 connector and them to be ordered separately with code MUXADAPT 27/17
(PN 985845).
The adapter should be first screw-fixed on the Termination Board (screws included). The Mux2700 can then be
mounted onto the adapter following the previously described procedure.
7.4 Final checks
Before applying power and putting the Mux2700 module into operation, carefully check the following:
•
On termination board
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supply connections, voltage level and polarity
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field wiring polarity and tags
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serial line (RS-485) wiring, with special care to polarity
•
On Mux2700 module
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RS-485 address (between 1 and 31)
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RS-485 baud rate (9600 or 19200)
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SW8 position, (OFF)
•
On RS-232/RS-485 converter
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baud rate (9600 or 19200)
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RS-485 connections, with special care to polarity
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RS-232 and supply connections
•
On Maintenance Workstation:
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proper software installation and configuration
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baud rate (9600 or 19200).
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RS-232 line operation and connections
