The IOTA provides the field termination layer; output generation, diagnostics and HART capability are determined by the installed Series C I/O module.
I/O PAIRING
One IOTA, two output roles
The installed I/O module sets the communication capability of each output channel.
H
CC-PAOH51 High-level analog output with HART
SMART LOOP
A
CC-PAON01 High-level analog output, non-HART
CURRENT LOOP
OPERATING ENVELOPE
Loop behavior that affects replacement work
Directly settable current
0 mA or 2.9–21.1 mA
Maximum resistive load
800 Ω at 22–28 Vdc supply
Compliance / open circuit
16 V maximum / 22 V maximum
Settling response
Within 1% in 80 ms
Calibrated accuracy at 25 °C
±0.35% of full scale, including linearity
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BUYER FAQ
Compatibility questions that protect the retrofit
Q ◇ Can DC-TAOX51 51307717-175 serve both HART and non-HART output modules?
A ● Yes. It is paired with CC-PAOH51 for HART output or CC-PAON01 for non-HART output, according to the installed Series C arrangement.
Q ◇ Why is DC-TAOX51 51307717-175 not a direct substitute for DC-TAOX61?
A ● DC-TAOX51 is a 6-inch non-redundant IOTA; DC-TAOX61 is the 12-inch redundant form. Their footprint and redundancy architecture differ.
Q ◇ How does DC-TAOX51 51307717-175 behave if control is lost?
A ● The associated I/O module can hold the last value or shed each channel to a configured safe value. An electronics failure drives the output toward zero.
Q ◇ Which diagnostics separate field-loop trouble from module trouble on DC-TAOX51 51307717-175?
A ● Output readback, discrepancy alarming and open-wire detection help distinguish commanded-current mismatch from a disconnected or high-resistance loop.
Q ◇ What loop budget should be retained with DC-TAOX51 51307717-175?
A ● Keep total resistive load within 800 Ω at 22–28 Vdc and account for cable, barriers and the receiving device within the 16 V compliance limit.