Instruction manual

ControlWave Gas Flow Computer (GFC Plus) Instruction Manual (CI-ControlWave GFC Plus)
Revised Feb-2013 Installation 2-19
2.3.4 Wiring Power to the CPU/System Controller Board
Caution
At this time you can connect power wiring. However; for safety reasons
and to prevent accidental damage to your bulk DC power supply, do not
connect the pluggable terminal block connectors TB1 and TB2 to the
CPU/System Controller board until after you install, wire, ground, and
configure the entire unit.
Follow the instructions in Section 2.3.3 General Wiring Guidelines when
wiring connections.
Power Supply
Current
Requirements
Depending upon the CPU type, the ControlWave GFC Plus accepts
either a 6Vdc, 12Vdc or 24Vdc bulk power input. You can estimate the
maximum current required for your ControlWave GFC Plus using the
following equation:
Bulk +6/12/24 Vdc Supply Current = CPU/System Controller Board (with
options) + Process I/O Board + LCD
display/keypad + optional modem /
radio
Refer to Table 2-4 for ControlWave GFC Plus power requirements
based on the CPU type.
Table 2-4. ControlWave GFC Plus Bulk Power Requirements
CPU Type and Components
Bulk 6Vdc
Power
Supply
Bulk 12Vdc
Power Supply
Bulk 24Vdc
Power Supply
14 MHz Ultra Low Power CPU with LCD
display/keypad
7 mA without field supply
and with AO output
under range: 5 mA
Not Supported
33 MHz CPU with Ethernet and LCD
display/keypad
Not
Supported
without process I/O
board: 80 mA
without process I/O
board: 47 mA
Note: If your ControlWave GFC Plus includes a modem or radio,
contact the radio/modem manufacturer for power consumption
specifications.
Caution
If your ControlWave GFC Plus is configured to use a solar panel to
charge a 7AH (6V or 12V) battery for power, NEVER CONNECT THE
SOLAR PANEL/CHARGER WITHOUT ALSO CONNECTING THE
BATTERY. Connections without the battery present can damage power
supply components.