Instruction manual

ControlWave Micro Instruction Manual (CI-ControlWave Micro)
3-48 I/O Modules Revised Jun-2013
3.15 Isolated Low Level Analog Input (LLAI) Module
Low Level Analog Input (LLAI) modules provide six individually
isolated differential inputs for thermocouples or 10mV inputs plus one
cold junction compensation (CJC) input for temperature compensation
at the terminal block.
Table 3-32. Isolated LLAI Module Characteristics
Type Number
Supported
Characteristics
Isolated Low
Level Analog
Input (LLAI)
6
Each isolated LLAI supports/includes:
 Signal conditioning circuitry including a
2.5V reference
 Surge suppression with a 188V
Transorb that meets IEEE standard
472-1978.
 Over voltage protection
 Opto-isolation circuitry.
Each input is
provided electrical isolation of 500Vdc
(channel to channel/system bus).
 24-bit analog to digital converter (ADC)
The CJC with a built-in RTD provides thermocouple temperature
compensation at the terminal block and is electrically isolated. Pins 8, 9
and 10 of the local terminal block (TB1) source and sink the CJC’s
RTD.
Detailed Technical
Specifications
For detailed technical specifications, please see our website
http://www.emersonprocess.com/remote.
Configuration
The isolated LLAI module (general part number 396875-XX-X) has
the following configurations:
Table 3-33. Isolated LLAI Module Configurations
Part Number Termination Connector Notes
396875-01-7
local
396875-02-5
remote
Wiring the Module
Figure 3-29 shows field wiring for locally terminated isolated LLAI
modules. Figure 3-30 shows field wiring for remotely terminated
isolated LLAI modules.
Figure 3-29 also provides diagrams showing the wiring for
thermocouples and the 3-wire cold junction compensation (CJC) PCB to
a locally terminated LLAI module (that is, +AI#, -AI#, +CJC
(Reference), -CJC (Return) & +CJC (Sense) are similar to those
assigned to the remote DIN-rail mountable terminal blocks. A small
CJC PCB is factory-installed to the terminal block.