HONEYWELL Expert Series-C I/O Module

AI accuracy 0.1% (23.5 ± 2 ° C)/0.175% (0-70 ° C)/0.25% (-40-70 ° C)

AI scanning rate of 10 ms

AO response time 0.25 ms (non HART mode)/80 ms (HART mode)

SOE resolution 1 ms

Pulse input frequency 0-15 kHz

Minimum pulse width 25 μ s

Short circuit protection is (<1.4A @ 2 μ s,<750mA @ 10 μ s)

IOTA model non redundant: CC-TUIO31 (9 "); Redundancy: CC-TUIO41 (12 ")

Significant enhancement of CC-PUIO31:

Each channel can be configured as SOE input (1ms resolution)

Each channel is equipped with an independent HART modem for fast HART communication

Analog input scanning rate increased to 10 ms

More compact IOTA size (9 ″/12 ″)

Redundant Configuration and Fault Safety

1. Implementation of I/O redundancy

The redundancy implementation of Series C I/O is extremely simple: simply insert two I/O modules of the same model on the same IOTA. Two modules work synchronously. When the main module fails, the backup module seamlessly takes over, and the output channel switches without interruption (digital output) or only with very short interruption (analog output, ≤ 10 ms). Redundant configuration is applicable to all major I/O types, including AI, AO, DI, DO, and pulse inputs.

2. FAILOPT (fail safe)

For both analog and digital output modules, each channel can independently configure fault safety behavior:

Maintain last value: When a communication or module fault is detected, output the last value before the fault is maintained

Switch to safe value: When a fault is detected, the output switches to the preset safe value (such as 0% or 4mA)

The safety value of digital output can be set through configuration, while the safety value of analog output can be set to 0 mA or a custom value.

3. Open circuit detection and soft faults

Most Series C I/O modules support open circuit detection function. When a field circuit disconnection is detected, the system will:

Mark the process variable at this point as' invalid 'in the control strategy

Generate channel soft fault alarm

Prevent the controller from performing erroneous control actions based on invalid data

IOTA Size and Selection Guide

I/O type Non redundant IOTA Redundant IOTA Description

AI (HART/Standard) 6 "/9" 12 "9" IOTA supports 16 channel fully differential input

AO (HART/Standard) 6 ″ 12 ″ -

DI 24V 9″ 12″ —

DI high voltage 9 ″ 12 ″ -

DO 24V bus 9 ″ 12 ″ -

DO relay 6 "12" relay IOTA uses CC-PDOB01 IOM

Temperature LLMUX 6 "(IOTA)+external FTA-64 channel, PMIO FTA required

Temperature 16 channel 9 "- CC-PAIL51 module

Pulse input -12 "only supports redundant configuration

Universal I/O (PUIO01) 12 ″ 18 ″ -

Universal I/O (PUIO31) 9 "12" Enhanced Edition, More Compact

Key points of system integration

1. Integration with C300 controller

Series C I/O communicates with the C300 controller through an I/O link. I/O link rate:

375 Kbaud（PM I/O）

750 Kbaud（Series C I/O）

The C300 controller supports up to 2 I/O links, and each link can connect multiple IOTAs. The execution cycle of the I/O module matches the execution cycle of C300 (50 ms or 20 ms).

2. On site power distribution

Series C I/O modules provide non flammable power to field devices:

Analog input module: Each channel has independent current limiting (approximately 24 mA)

Digital input module: supports internal or external 24V power supply

Digital output module: supports internal or external 24V power supply, external power supply can achieve electrical isolation between the system and the site

3. Environmental specifications

The operating temperature range of Series C I/O modules varies by model:

Standard module: 0 to+60 ° C

Extended temperature module (such as PUIO31, PAIL51): -40 to+70 ° C

Storage temperature: -40 to+85 ° C

Relative humidity: 5-95% (non condensing)

Functional Matrix and Selection Suggestions

At the end of the document, a detailed functional matrix is provided to assist users in selecting the most suitable combination of I/O modules based on application requirements. The main selection considerations include:

Do you need HART communication: If you need HART status, diagnostics, or multivariate data, choose a module with HART (such as PAIH01, PAOH01); If only 4-20mA signal is required, choose without HART module (such as PAIX01, PAOX01).

Do you need sequence of events (SOE): Select CC-PDIS01 (digital input) or CC-PUIO31 (universal I/O) to implement 1ms resolution timestamps.

Do you need redundancy: Select redundant IOTA and configure dual I/O modules.

On site equipment types: analog signals, digital signals, thermocouples/thermistors, pulse signals, etc. determine the selection of module types.

Installation space: Select the appropriate size of IOTA based on the depth of the cabinet. The 9 inch module achieves a balance between functionality and size, while the 6 inch module is suitable for space constrained environments.