H Comm Module Installation; H Comm Module Wiring - Signet 9900 Operating Instructions Manual

H COMM Module Installation

If the 9900 Base Unit will be mounted in a panel, plug-in modules
may be installed either before or after the base unit is mounted.
If the 9900 Base Unit will be mounted using the accessory wall
mount kit , install plug-in modules fi rst.
(3-9900.392)
If the Direct Conductivity/Resistivity Module will be included in
your unit, install the H COMM module fi rst and then install
Conductivity/Resistivity Module over the H COMM Module.
To install the H COMM module, carefully align the module pins
into its plug (see illustration) and push the module straight in until
the tabs on the bottom edge snap into place.
To uninstall, squeeze tabs, grasp the module and pull straight out.
Be careful not to bend the pins when installing or
removing the module to or from the base unit.
NOTE: The black rubber jumper adjacent to the power terminal should only be removed when both
the H COMM Module is utilized and the required sensor cable length is over 304 m (1000 ft).

H COMM Module Wiring

Connecting HART with a Loop-powered sensor
(Typical installation)
Connecting HART to a Hand-Held Master Device
(Typical installation)
9900 Device
Connections
Black
Loop +
Loop –
Red
(Secondary HART Master)
9900 Device
Connections
Red
Loop +
Loop –
Black
(Primary HART Master)
–
Device
Optional ammeter Power
–
(recommended for
Supply
4 to 20 mA trim only)
Hand-held device
+
Power
Supply
–
250
Load Resistor
Hand-held device
(HART Master)
PLC
+
+
9900 Transmitter 65