*3-9900.094*
For complete product information, please download the full
9900 Transmitter manual at www.gfsignet.com
Signet 9900 H COMM Module Instruction Sheet
3-9900.094 Rev. 4 05/18
The H COMM Module enables communication between the 9900 and
a HART
®
-enabled device. The HART (Highway Addressable Remote
Transducer) Protocol superimposes digital signals on top of the 4 to 20 mA
analog signal.
NOTE: With H COMM Module installed, a minimum of 24 V is required for
loop-powered systems.
English
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 (3-9900.392), install plug-in modules first.
If the Direct Conductivity/Resistivity Module or the 4 to 20 mA Output Module will be included in your unit, install the HCOMM
module first, then install the other 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.
Wiring
3-9900-1P Panel Mount
3-9900.395
H COMM Module
DC Power
Loop Voltage
–
+
+
–
PLC
Device
Optional ammeter
(recommended for
4 to 20 mA trim only)
Power
Supply
9900 Device
Connections
Loop +
Loop –
(Primary HART Master)
Hand-held device
(Secondary HART Master)
Red
Black
Connecting HART with a Loop-powered sensor
CAUTION
Exercise care when installing module.
Do not bend connecting pins.
Align pins and connectors then push module firmly
into place.
Avoid Electrostatic Discharge (ESD)
●Minimize handling of module to reduce the
possibility of damage due to ESD.
●Handle module by the edges.
●Never touch any exposed circuitry or contacts.
●Wear an anti-static wristband, stand on an anti-
static mat, or keep one hand touching a properly
grounded pipe or other properly grounded piece
of metal when handling module.
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