Instruction manual

ControlWave Gas Flow Computer (GFC Plus) Instruction Manual (CI-ControlWave GFC Plus)
Revised Feb-2013 I/O Configuration and Wiring 3-9
3.3.4 Non-Isolated Analog Output (AO) on TB7 of Process I/O
Board
Process I/O Board terminal block connector TB7 provides interface to a
single analog output (AO).
Table 3-6. Non-Isolated AO General Characteristics
Type Number
Supported
Characteristics
Analog
Output
(AO)
1 (on TB7)
 Supports either 4-20mA or 1-5V operation.
Selection using jumper JP1 and switch SW1-
4.
 Jumper JP3 determines whether AO field
power comes from system power (nominally
12 or 24V from bulk input supply applied to
TB1-3 and TB1-4 on the CPU/System
Controller Board) or from an external 24V
power source (+11 to +30Vdc connected to
TB7-3 and TB7-4) such as the ControlWave
Loop Power Supply.
 Maximum external load you can connect to a
4-20mA output is 250 ohms for an external
11V power source or 650 ohms for an
external 24V power source.
 Maximum external load current for the 1-5V
output is 5 mA (with an external 11 to 30 V
power source.)
 Factory-calibrated.
Setting
Jumpers
See Section 3.2.1 for details on setting jumpers.
Wiring
See Figure 3-2 for wiring diagrams. If using the ControlWave
Loop Power Supply, see document PIP-ControlWave-LS.
Note: If your ControlWave GFC Plus uses 6V bulk power,
you must provide external power for the AO.
Software
Configuration
To use data from this AO you must include a CWM_EIO board in
your ControlWave project using ControlWave Designer’s I/O
Configurator, and then configure it. See the ControlWave Designer
Programmer's Handbook (D5125) for more information. That
same manual includes an I/O Mapping section that describes, for
advanced users, the I/O map for this board.