Instruction manual

ControlWave Gas Flow Computer (GFC Plus) Instruction Manual (CI-ControlWave GFC Plus)
3-8 I/O Configuration and Wiring Revised Feb-2013
3.3.3 Non-Isolated Analog Inputs (AI) on TB6 of Process I/O Board
Process I/O Board terminal block connector TB6 provides interface to
three single-ended analog inputs (AIs).
Table 3-5. Non-Isolated AI General Characteristics
Type Number
Supported
Characteristics
Analog
Inputs (AI)
3 (on TB6)
 Jumper-selectable using JP5, JP6, and
JP7 for either 4-20mA or 1-5V operation.
 Jumper JP4 determines whether AI field
power comes from system power (bulk
input supply applied to TB1-3 and TB1-4
on the CPU/System Controller Board) or
the external loop power source connected
to TB7-3 and TB7-4 on the Process I/O
board such as the ControlWave Loop
Power Supply.
 2 Hz low pass filter for each AI.
 Surge Suppression.
 Self calibrating.
Setting Jumpers
See Section 3.2.1 for details on setting jumpers.
Wiring
Each AI includes three terminals (field power, AI# and DGND). See
Figure 3-2 for wiring diagrams. If using the ControlWave Loop Power
Supply, see document PIP-ControlWave-LS.
Notes:
 You must connect cable shields associated with AI wiring to the
ControlWave GFC Plus chassis ground.
 Multiple shield terminations require you to supply a copper ground
bus. You must connect the ground bus to the ControlWave GFC
Plus chassis ground lug using up to a #4 AWG wire size. The
ground bus must accommodate a connection to a known good Earth
ground (in lieu of a direct connection from the ControlWave GFC
Plus chassis ground) and to all AI cable shields.
 Use an appropriate terminal lug for shield wires and secure them to
the copper bus using industry rugged hardware (screw/bolt, lock
washer and nuts).
Software
Configuration
To use data from these AIs 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.