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Honeywell CC-PAIH01 Analog Input Module

Configured for analog signal acquisition in Honeywell DCS platforms, the Honeywell CC-PAIH01, also cataloged as the 51405038-175 Analog Input Module, provides direct physical/electrical execution. It operates as the interface hardware to digitize process field signals for central processing units. The device contains 16 input channels capable of reading both voltage and current loop configurations while maintaining communication via the Highway Addressable Remote Transducer (HART) protocol.

Hardware Specifications

Parameter	Specification
Model	CC-PAIH01
Brand	Honeywell
Spare Part Number	51405038-175
Origin	USA
Weight	0.4 kg
Dimensions	5.5 x 16 x 14.5 cm
Input Channels	16 Channels
Input Type	Voltage, Current
Input Range	0 to 5 V, 1 to 5 V, 0.4 to 2 V, 4-20 mA
Power Consumption	0.195 Amp @ 24 VDC
A/D Converter Resolution	16 bits
Common Mode Rejection Ratio	70 dB (dc to 60 Hz)
Common Mode Voltage	-6 to +5 V peak (dc to 60 Hz)
Normal Mode Rejection Ratio	19 dB @ 60 Hz
Normal Mode Filter Response	Single-pole RC, -3 dB @ 6.5 Hz
Maximum Normal Mode Input	+/- 30 Volts
Crosstalk	-60 dB (dc to 60 Hz)
Input Impedance	> 10 M Ohm (powered)
Status	Discontinued by manufacturer

4-20 mA HART Loop Protocol Execution

The CC-PAIH01 integrates a dedicated 4-20 mA HART loop protocol layer across all 16 channels, enabling the extraction of secondary variable data from intelligent field transmitters. Digital frequency-shift keying (FSK) signals are superimposed on the analog current loop without disrupting the primary analog measurement. The module supports point-to-point configuration and multidrop networking topologies, executing cyclic validation of digital instrument status and diagnostics alongside high-resolution 16-bit analog-to-digital conversion.

Frequently Asked Questions

Q: Does the CC-PAIH01 support hot-swapping under live backplane power?

A: Yes, the module is engineered for online insertion and removal (OIR) within compatible Honeywell I/O termination assemblies. Hot-swapping must be executed when the system is stable to prevent transient field loop disruptions.

Q: How is the input current loop configured on the channel level?

A: The input range selection (0 to 5 V, 1 to 5 V, 0.4 to 2 V, or 4-20 mA) is software-configurable via the system engineering interface. For 4-20 mA current loops, external or internal conditioning resistors must match the required voltage drop for the 16-bit A/D converter.

Field Installation Guidelines

• Shield Grounding: Ensure all field instrument signal shields are terminated at a single, clean instrumentation ground point (typically at the Marshalling Panel). Do not ground shields at both ends to eliminate the risk of ground loops.
• Routing Limitations: Maintain separate routing paths for low-voltage signal cables (4-20 mA/voltage) and high-voltage AC power lines to minimize electromagnetic interference and cross-talk.
• Module Insertion: Align the module carefully with the plastic guides of the I/O slot before applying continuous pressure to engage the backplane connectors. Verify that the dual mechanical retention screws are fully locked.

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