Georg Fischer Signet 9900 Instruction Sheet

Signet 9900 Modbus Module
*3-9900.270.091*
3-9900.270.091 Rev 0 02/18
3-9900-1P Panel Mount
CAUTION
Exercise care when installing module.
Do not bend connecting pins.

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 fi rst.
• If the Direct Conductivity/Resistivity Module or Current
Loop Module will be included in your unit, install the
Modbus module fi rst and then install Conductivity/Resistivity
Module over the Modbus Module.
• Attach the output connector to the terminal block on the
Modbus Module prior to installing in the 9900. When
inserting the Modbus module with the wiring connector
ensure the wires are not pinched by the power or open
collector terminal blocks of the 9900.
1. Disconnect power from the 9900.
2. Attach the wire harness prior to installing the module.
3. Carefully align pins and connectors then push module
firmly into place (see illustration).
4. Ensure the cable is not crimped between the module
housing and the 9900 Power or OC terminals.
5. To uninstall, squeeze tabs, grasp the module and pull
straight out.
Example showing M2 version
The Signet 9900 Modbus Module allows the Signet 9900 SmartPro
to connect to a Modbus master compatible device. The Modbus Module
supports RTU or ASCII modes over serial RS485 communication links.
The Modbus Module has an internal programmable network termination for the
communication link enabled by Modbus command.
● Minimize handling of module to reduce the possibility of
● Handle module by the edges.
● Never touch any exposed circuitry or contacts.
● Wear an anti-static wristband, stand on an anti-static mat, or
3-9900
Panel Mount
Transmitter
Plug in Module,
directing wires
around Power/OC
terminals. Do not
pinch wires!
For M2 panel installation.
Restrain terminal block assembly
prior to shipping.
Instruction Sheet

Avoid Electrostatic Discharge (ESD)

damage due to ESD.
keep one hand touching a properly grounded pipe or other
properly grounded piece of metal when handling module.
Important! Do not exceed 32 VDC or permanent
damage to the Modbus Module will occur.
3-9900.270-M1 version: Wire Cable
Cable assembly with 6" Wires - pig tail
White
Black
Orange
Gray
Brown
Modbus Module
Yellow
3-9900.270-M2 version: Terminal board (Panel Mount Only)
Cable assembly with 3" wires, inner-connect to board
V- (12 to 24 VDC Common)
White
V+ (12 to 24 VDC)
Black
Orange
Reset
Com/Reset GND
Gray
D0 (RS485 -)
Brown
Modbus Module
D1 (RS485 +)
Yellow
Coming Soon
3-9900.270-M3 version: with M12 Connector (Field Mount Only)
Cable assembly with 6" wires with M12 Connector
White
V- (12 to 24 VDC Common) Pin 4
Black
V+ (12 to 24 VDC) Pin 3
Orange
X
Reset No Connection
Gray
Com/Reset GND Pin 5
Brown
Modbus Module
D0 (RS485 -) Pin 2
Yellow
D1 (RS485 +) Pin 1
Coming Soon
English
® Transmitter
V- (12 to 24 VDC Common)
V+ (12 to 24 VDC)
Reset
Com/Reset GND
D0 (RS485 -)
D1 (RS485 +)
ISO D0 D1 J2
GND
PWR +
PWR -
Loop +
Loop -
M12 Connector
Male front view
Pin 5
Pin 2
Pin 1
Pin 4
Pin 3