Connections
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MXD73 Installation Guide
Connections
Relay Connections
The MXD73 can be supplied with up to 6 relays designated 1 to 6, 1 to 4 are change over
relays while 5 to 6 are normally open relays The relay contacts are connected to the
terminals only and are electrically isolated from the instrument itself. They must be
connected in series with a 5 Amp fuse. A contact arc suppressor may be required to
prevent excessive electrical noise, depending upon the load. To switch more than 5 Amps
will require a slave relay. For convenience, the power can be looped across from the supply
connections.
Relays 1 -2
Connection Details
Relays 3 -6
Connection Details
(N.B. Available Relays Varies Depending Upon Instrument Configuration)
Modbus RS485 Connections
For information regarding connecting the Modbus RS485, please see the wiring section in
the accompanying Modbus RS485 handbook.
Sensor Connections
For information regarding connecting the various compatible sensors to the unit see the
wiring section in the input card’s accompanying handbook.
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