HONEYWELL Expert Series-C I/O Module

HONEYWELL Expert Series-C I/O Module

In process control systems, the input/output (I/O) subsystem serves as a bridge connecting the controller and field devices, and its performance and reliability directly affect the overall quality of operation of the control system. The Expert Series C I/O module launched by Honeywell, as a complementary I/O solution for the C300 controller, provides a high-performance on-site signal access platform for the process industry with its innovative compact design, powerful functional integration, flexible redundant configuration, and excellent reliability. This article will provide a comprehensive and in-depth professional interpretation of the system architecture, module specifications, functional features, and selection and configuration of Series C I/O.

Product Overview and Technical Positioning

Series C I/O is an important component of Honeywell's Expert Process Knowledge System (PKS), used in conjunction with the C300 controller to achieve high-speed data exchange through an I/O link. This series of I/O modules adopts an innovative shape of vertical installation and inclined design, optimizing thermal management inside the cabinet and significantly improving channel density per unit area.

Core design features

Integrated design: The I/O module (IOM) is directly plugged into the input/output terminal assembly (IOTA) without the need for a separate electronic rack. IOTA integrates on-site wiring terminals, signal conditioning circuits, and on-site power distribution functions, greatly simplifying installation and maintenance.

Modular redundancy: Channel level redundancy can be achieved by inserting two IOMs on the same IOTA, without the need for external redundant controllers or additional wiring, significantly reducing the complexity of redundant configurations.

No fuse protection: All I/O circuits are equipped with built-in electronic short-circuit protection, eliminating the need for on-site fuses and reducing installation and maintenance costs.

Non flammable on-site power supply: The module provides non flammable power to on-site equipment that meets the requirements of Class I Division 2 hazardous areas, without the need for external power wiring.

Compact size: According to different functions, IOTA sizes are divided into 6 inches, 9 inches, 12 inches, and 18 inches, supporting high-density cabinet installation.

I/O module specification details

The Series C I/O product family covers various types such as analog input/output, digital input/output, temperature input, pulse input, and general-purpose I/O. The following are detailed technical specifications for each module.

1. Analog input module

1.1 CC-PAIH01/02- High level analog input with HART

Parameter specifications

Number of channels 16 (12 single ended/4 differential)

Input type voltage (0-5V, 1-5V, 0.4-2V), current (4-20mA, through a 250 Ω resistor)

Resolution 16 bits

Accuracy ± 0.075% (23.5 ± 2 ° C)/± 0.15% (0-60 ° C)

Scanning rate of 50 ms

HART support (supports multivariable instruments)

Non flammable power supply with independent current limiting protection for each channel

IOTA model non redundant: CC-TAIX01 (6 ")/CC-TAID01 (9"); Redundancy: CC-TAIX11 (12 ")/CC-TAID11 (12")

Features: Supports differential configuration of voltage input channels (13-16), which can be selected through jumper wires on IOTA. The low-end inputs of channels 13-16 can be connected to the system common terminal through jumper wires for single ended or differential operation.

1.2 CC-PAIH51- High level analog input with HART (single ended)

Parameter specifications

Number of channels 16 (all single ended)

Input type 4-20mA current (through a 200 Ω resistor)

Accuracy ± 0.075% (23.5 ± 2 ° C)/± 0.15% (0-60 ° C)

Scanning rate of 50 ms

HART support is

IOTA model non redundant: CC-TAIX51 (6 ″); Redundancy: CC-TAIX61 (12 ")

1.3 CC-PAIX01/02- High level analog input without HART

The specifications are similar to CC-PAIH01/02, but without HART communication function, suitable for traditional 4-20mA transmitter applications that do not require digital communication.

1.4 CC-PAIN01- High level analog input without HART (single ended)

Parameter specifications

Number of channels 16 (all single ended)

Input type 4-20mA current (through a 200 Ω resistor)

Accuracy ± 0.075% (23.5 ± 2 ° C)/± 0.15% (0-60 ° C)

Scanning rate of 50 ms

IOTA model non redundant: CC-TAIN01 (6 ″); Redundancy: CC-TAIN11 (12 ″)

2. Low level analog (temperature) input module

2.1 CC-PAIM01- Low level multiplexer (LLMUX)

Parameter specifications

64 channels (16 point increment)

Input type: Thermocouple (TC) or Thermistor (RTD)

Scan rate of 1 second (fixed)

Input impedance 1 M Ω (TC input)

Common mode voltage ± 250 VDC or VAC RMS

Common mode rejection ratio 120 dB min

Cold end compensation accuracy ± 1.0 ° C (0-50 ° C)/± 1.5 ° C (-20-60 ° C)

Open circuit detection ≤ 1000 Ω ensures no triggering, ≥ 1500 Ω ensures triggering

FTA models MU-TAMT04 (TC), MU-TAMT14 (TC with remote cold end) MU-TAMR04（RTD）

Size 2.5 ″ D × 4.9 ″ W × 12.1 ″ L

Supported thermocouple types: J, K, E, T, B, S, R, Japanese R-type

Supported RTD types: Pt100 (DIN), Pt100 (JIS), Ni120, Cu10, Cu50

2.2 CC-PAIL51-16 channel low-level analog input

Parameter specifications

Number of channels 16

Input type thermocouple or RTD (configurable per channel)

Scan rate 1 second

Complete isolation of channels (between channels, between channels and the power system)

Common mode voltage ± 250 VDC or VAC RMS

Cold end compensation range -20 to+60 ° C (± 0.5 ° C typical)

IOTA model CC-TAIL51 (9 ″)

3. Analog output module

3.1 CC-PAOH01/51- Analog Output with HART

Parameter specifications

Number of channels 16

Output type 4-20 mA

Resolution 0.05% full scale

Accuracy ± 0.35% (25 ° C)

Maximum load of 800 Ω (when powered by 24V)

Stable to 1% within 80 ms response time

FAILOPT support is (each channel can be configured to maintain the last value or switch to a safe value)

Open circuit detection is

IOTA model non redundant: CC-TAOX01 (6 ")/CC-TAOX51 (6"); Redundancy: CC-TAOX11 (12 ")/CC-TAOX61 (12")

3.2 CC-PAOX01/51- Analog output without HART

The specifications are similar to CC-PAOH01, but without HART communication function. Suitable for standard 4-20mA actuator control applications.

4. Digital input module

4.1 CC-PDIL01/51-24VDC digital input

Parameter CC-PDIL01 CC-PDIL51

Number of channels 32 32

Input voltage range 18-30 VDC 18-30 VDC

ON threshold ≥ 13 VDC or ≥ 3 mA ≥ 13 VDC or ≥ 3 mA

OFF threshold ≤ 5 VDC or ≤ 1.2 mA ≤ 5 VDC or ≤ 1.2 mA

Input impedance 4.2 k Ω 4.2 k Ω

Response delay 5 ms ± 20% 5 ms ± 20%

Isolation 1500 VAC RMS 1000 VAC RMS

Is there an open circuit detection

IOTA model non redundant: CC-TDIL01 (9 "); Redundancy: CC-TDIL11 (12 ") Non redundancy: CC-TDIL51 (9"); Redundancy: CC-TDIL61 (12 ")

4.2 CC-PBIS01- Sequence of Events (SOE) Digital Input

Parameter specifications

32 channels

Normal mode (20ms PV scan), SOE mode (1ms resolution), low latency mode (5ms PV scan)

Timestamp resolution 1 ms

Input characteristics are the same as CC-PDIL01

Open circuit detection support (normal mode only)

IOTA model non redundant: CC-TDIL01 (9 "); Redundancy: CC-TDIL11 (12 ")

4.3 CC-PDIH01- High Voltage Digital Input

Parameter 120V IOTA 240V IOTA

Nominal voltage 120 VAC/125 VDC 240 VAC

Voltage range 90-132 VAC/100-138 VDC 180-264 VAC

Pull in voltage ≥ 90 VAC/≥ 100 VDC ≥ 180 VAC

Release voltage ≤ 20 VAC/≤ 25 VDC ≤ 50 VAC

Response delay 25 ms (AC)/10 ms (DC) 25 ms

IOTA model non redundant: CC-TDI110 (9 "); Redundancy: CC-TDI120 (12 ") Non redundancy: CC-TDI220 (9"); Redundancy: CC-TDI230 (12 ")

5. Digital output module

5.1 CC-PDOB01- Bus based 24VDC digital output (source type)

Parameter specifications

32 channels

Output type: Source

Load current per channel 0.5 A maximum

When there is no short circuit, the load current of each 8-channel group is 4A; when there is a single short circuit, it is 3A; when there is a double short circuit, it is 1.5A

The total load current of the module is 6A

Short circuit protection electronic, no fuse required

FAILOPT is configurable for each channel

IOTA model non redundant: CC-TDOB01 (9 "); Redundancy: CC-TDOB11 (12 ")

5.2 CC-PDOB01+Relay IOTA - Relay Output

Parameter specifications

32 channels

Contact type Form A (SPST/NO) or Form B (SPST/NC), jumper optional

Maximum load voltage 250 VAC/125 VDC

Maximum load current 3A @ 30 VDC/250 VAC (resistive)

Minimum load of 12 VDC/100 mA

Surge current 10A for 4 seconds (10% duty cycle)

Contact material AgSnO ₂

IOTA model non redundant: CC-TDOR01 (6 "); Redundancy: CC-TDOR11 (12 ″); Expansion board: CC-SDOR01 (12 ")

5.3 CC-POD51-24VDC digital output (leakage type)

Parameter specifications

32 channels

Output type: Sink (open leak)

Load current per channel 0.1 A maximum

Isolate 1000 VAC RMS (system and site)

IOTA model non redundant: CC-TDOD51 (9 "); Redundancy: CC-TDOD61 (12 ")

6. Pulse input module

CC-PPIX01- Pulse Input Module

Parameter specifications

Number of channels: 8 (single channel) or 4 (dual channel)

Frequency range 0-100 kHz (single channel)/0-10 kHz (dual channel)

Frequency accuracy ± 0.001% reading

Input voltage range 0-35 VDC

Input threshold high: 8.4V (low → high)/7.7V (high → low); Low: 2.8V (low → high)/2.0V (high → low)

Minimum pulse width 3 μ s (pulse suppression off)/20 μ s (pulse suppression on)

Quickly cut off output channels 7 and 8 to provide optically isolated solid-state relays (2.5A)

Fast cut-off delay ≤ 1 ms

IOTA model CC-TPIX11 (12 ")

Special feature: Supports ISO 6551/API 5.5 dual pulse input (A-level fidelity), suitable for metrology and trade handover applications; Support the pulse output function of the verifier.

7. Universal Input/Output Module

7.1 CC-PUIO01-32 channel universal I/O

Parameter specifications

32 channels

Configurable functions include analog input (4-20mA), analog output (4-20mA), digital input, digital output, and pulse input (channels 15-18)

AI accuracy 0.1% (23.5 ± 2 ° C)/0.17% (-40-70 ° C)

AO accuracy<0.5% full scale

AO maximum load 700 Ω

DO load current 0.5A/channel, 9A/module

HART support is (analog I/O)

IOTA model non redundant: CC-TUIO01 (12 ″); Redundancy: CC-TUIO11 (18 ")

7.2 CC-PUIO31-32 Channel Universal I/O (Enhanced Edition)

Parameter specifications

32 channels

Configurable functions AI (4-20mA), AO (4-20mA), DI (including SOE), DO, pulse input (any 4-channel)

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.