FOXBORO P0916PH P0916AL I/O module

FOXBORO P0916PH P0916AL I/O module

Product Overview

FOXBORO P0916PH and P0916AL are both core I/O modules in the Foxboro I/A Series distributed control system (DCS), belonging to the high-density signal processing series. They focus on the professional functions of analog input (AI) and analog output (AO), respectively, and are key transmission hubs between industrial field analog signals and system control layers. P0916PH is based on high-precision analog signal acquisition and is compatible with various sensor signals; P0916AL focuses on precise analog control signal output to drive on-site execution devices, and the two are often used together to construct a complete analog control circuit.

Both modules adopt industrial grade reinforced design, with excellent anti-interference ability and environmental adaptability, and can operate stably in high-temperature and high electromagnetic interference scenarios in industries such as petrochemicals and power energy. Through deep integration with the I/A Series system, it supports real-time signal processing, data uploading, and remote configuration, providing solid hardware support for precise control and safe operation and maintenance of industrial production processes.

Specification parameters

Parameter category

P0916PH (analog input AI)

P0916AL (Analog Output AO)

Core functionality

Multi channel analog signal acquisition, filtering, isolation, and data uploading

Multi channel analog signal output, drive, fault diagnosis, status feedback

Channel specifications

16 channels single ended/8 channels differential optional; Input types: 4-20mA, 0-20mA, 1-5V, 0-5V

16 independent outputs; Output type: 4-20mA DC (default), 0-20mA DC (software configuration)

Signal performance

Accuracy: ± 0.02% FS; Resolution: 16 bits; Sampling rate: 100Hz/channel; Input impedance: ≥ 10M Ω (voltage), ≤ 10 Ω (current)

Accuracy: ± 0.05% FS; Resolution: 16 bits; Response time: ≤ 1ms; Load capacity: 0-1000 Ω; Output ripple: ≤ 10mVpp

Isolation performance

Optoelectronic isolation between channels/modules and systems, with isolation voltage ≥ 2500VAC

Independent isolation between channels, isolation voltage ≥ 2500VAC, with short-circuit protection

communication interface

Foxboro I/A Series Backplane Bus; Communication speed: 1Mbps; Data latency ≤ 1ms

Consistent with P0916PH, supports high-speed synchronous communication with the controller

working power supply

System bus power supply: 5VDC ± 5% (logic), 24VDC ± 10% (signal); Power consumption ≤ 12W

Consistent with P0916PH, full load power consumption ≤ 15W

environmental parameters

Working temperature: -10 ℃ -65 ℃; Storage temperature: -40 ℃ -85 ℃; Humidity: 5% -95% (no condensation)

Completely consistent with P0916PH, suitable for the same harsh environment

Physics and Authentication

Size: 160mm × 100mm × 220mm; rack mounted; Certification: UL 61010-1, IEC 61326-1, ATEX Zone 2

Consistent with P0916PH, achieve a compact layout within the rack

Performance characteristics

1. Common characteristics

-High reliability and stability: Select wide temperature industrial grade components, undergo high and low temperature cycling, vibration and impact testing, and support 7 × 24-hour continuous operation; Built in surge protection circuit, compliant with IEC 61000-4-5 standard, to resist on-site voltage surges.

-Excellent anti-interference ability: Multi stage EMC filtering and optoelectronic isolation design effectively block electromagnetic interference and common mode noise, ensuring signal stability in strong interference environments such as frequency converters and high-power motors, suitable for complex scenarios such as metallurgy and chemical engineering.

-Deep system integration: designed specifically for I/A Series DCS, seamlessly compatible with Control Builder configuration software, supporting online configuration of channel functions and range, and parameter modification can be completed without downtime.

-Convenient maintenance and diagnosis: supports hot swapping function, module replacement does not require downtime; Equipped with channel status indicator lights and system diagnostic functions, it can quickly locate faults such as open circuits and short circuits, reducing maintenance costs.

2. Exclusive features

-P0916PH Exclusive: Supports single ended/differential input mode switching, with stronger anti-interference ability in differential mode, suitable for long-distance signal transmission; Built in signal conditioning circuit, can directly connect thermocouple and thermistor signals (requires dedicated module).

-P0916AL exclusive: Each output channel has independent short-circuit protection, which automatically limits the current to 25mA in case of short circuit and automatically recovers after troubleshooting; Support "manual output" mode for easy on-site debugging and device verification.

Working principle

1. Working principle of P0916PH (analog input)

1. Signal acquisition: The analog signals (4-20mA/1-5V) output by on-site sensors (such as temperature and pressure transmitters) are connected to the module channel through wiring terminals. Single ended mode is suitable for close range signals, and differential mode is used for long-distance or strong interference environments.

2. Signal conditioning and isolation: The input signal is filtered to remove high-frequency interference, then conditioned to the standard range by the signal amplification circuit, and then electrically isolated through an optoelectronic isolator to prevent interference from being transmitted to the system side.

3. Conversion and transmission: The conditioned analog signal is converted into a digital signal by a 16 bit AD conversion chip, processed by the core microprocessor, and uploaded in real-time to the I/A Series controller through the backplane bus to provide on-site data for control operations.

2. Working principle of P0916AL (analog output)

1. Instruction reception: The module receives control instructions (digital quantity) issued by the controller through the backplane bus, which includes the output signal type and target value (such as 12mA corresponding to 50% opening).

2. Signal conversion and driving: After the core microprocessor parses the instructions, the 16 bit DA conversion chip converts the digital signal into an analog current signal. After being driven by the power amplification circuit, it is sent to the on-site execution equipment (such as regulating valves and frequency converters) through the output terminal.

3. Status feedback: The module monitors the output current value and channel status in real time. If there are faults such as short circuit or overload, the alarm information is immediately uploaded to the controller through the bus, and the current limiting protection action is executed at the same time.

When the two modules work together, the on-site data collected by P0916PH provides input to the controller, which calculates and outputs control instructions to P0916AL, forming a closed-loop loop of "acquisition operation control".

Precautions

1. Installation and configuration precautions

-Two modules need to be installed in adjacent slots of the I/A Series standard rack to facilitate the construction of control circuits; Cut off the power supply of the rack before installation, and ensure that the gold fingers are fully engaged with the backplane slot when inserting to prevent poor contact. The rack needs to be reliably grounded with a grounding resistance of ≤ 4 Ω.

-During configuration, the input mode (single ended/differential) and signal type of P0916PH should be specified through the Control Builder software, and the output range of P0916AL should be matched with the executing device (such as 4-20mA corresponding to the regulating valve); The setting of alarm threshold should be combined with process safety requirements.

-The installation environment should be kept away from strong magnetic fields (such as high-power transformers), high-temperature heat sources, and corrosive gases. The control cabinet should be equipped with a cooling fan to ensure that the ambient temperature does not exceed 65 ℃; Reserve ≥ 20mm heat dissipation space on both sides of the module.

2. Precautions for wiring and debugging

-Before wiring, confirm that both the module and the on-site equipment are powered off, and use a multimeter to verify that there is no residual voltage in the circuit; When using P0916PH differential input, it is necessary to distinguish between the positive and negative terminals and the common terminal. The P0916AL output line should be correctly connected to the positive and negative terminals of the executing device to avoid reverse connection.

-During P0916PH debugging, use a standard signal generator to apply known signals (such as 4mA, 20mA) and verify the consistency between the data uploaded by the module and the standard values; During P0916AL debugging, monitor the output current to ensure it is consistent with the controller instructions, and test whether the short-circuit protection function is normal.

-The signal cable adopts shielded twisted pair, and the shielding layer is grounded at one end (on the control room side); The power line and signal line are laid separately, with a spacing of ≥ 300mm, and cross vertically when crossing to reduce electromagnetic interference.

3. Precautions for operation and maintenance

-Regularly check the module status through HMI during operation, with a focus on signal fluctuations for P0916PH and output stability for P0916AL; Monthly inspection of indicator light status, quarterly tightening of wiring terminals to prevent oxidation and loosening.

-The module supports hot plugging, but before replacement, an "offline" operation must be performed through software to avoid damaging the bus system with live plugging; After replacement, download the configuration information again and calibrate it to ensure consistency with the original module parameters.

-Do not disassemble the module by yourself. When there is a malfunction, first check the external wiring and equipment. After confirming that it is a module malfunction, contact professional personnel for repair; When P0916AL experiences a short circuit fault, troubleshoot the load issue before resuming operation to prevent the fault from escalating.