PART TWO - INSTALLATION
SECTION 3 - ELECTRICAL CONNECTIONS
Rev. 6-501
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
27
3.4 Analog Outputs
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Two isolated analog outputs (1 and 2) are provided. Each
output can be set to be 0-20 mA or 4-20 mA, and assigned
to represent the measured pH/ORP or temperature.
The
outputs are isolated from the inputs and earth ground,
but not from each other.
For output configuration details,
see PART THREE, Section 4.4.
Wiring Tip!
Use high quality, shielded instrumentation
cable for connecting the analog outputs. To protect the
output signals from EMI/RFI, connect cable shields to:
The grounding strip at bottom of case (5 open holes,
Fig. 2-3) for analyzers with “B” prefix serial number.
The “ground symbol” Terminal 1 on TB1 (Figure 2-4)
for analyzers with “A” or no letter prefix serial number.
Each 0/4-20 mA output can drive a load of up to 600 ohms.
•
Output 1:
Connect the load to Terminals 2 and 3 on TB1,
matching polarity as indicated.
•
Output 2:
Connect the load to Terminals 4 and 5 on TB1,
matching polarity as indicated.
NOTE:
When using the HART communication option, a
digital signal is encoded onto the 4-20 mA analog
Output 1 signal. In a HART point-to-point wiring
configuration, Output 1 remains available for normal
use. However, in a HART multi-drop wiring configu-
ration, Output 1 becomes dedicated to that function
and cannot be used. See PART THREE, Section 8
for more HART communication information.
