Emerson DeltaV™ S-series Traditional I/O

Emerson DeltaV™ S-series Traditional I/O

Overview of S Series I/O Module Core

Product series classification

The S series I/O modules are divided into four categories based on "signal type" and "functional characteristics". The core uses and typical models of each module are shown in the table below:

Module Category Core Usage Typical Model Example Key Features

The digital input (DI) module collects discrete signals from industrial sites (such as sensor and limit switch status), converts them into system recognizable digital signals SDI810 and SDI820, supports dry/wet contact input, has photoelectric isolation function, strong anti-interference ability, and some models support "event capture" (such as edge detection)

The digital output (DO) module receives control instructions from the system output and drives actuators (such as solenoid valves and indicator lights) to operate. SDO810 and SDO820 provide two types of outputs: transistor output and relay output. The transistor output has a fast response (microsecond level) and the relay output is resistant to high voltage (suitable for high-power loads)

The Analog Input (AI) module collects continuously changing analog signals (such as 4-20mA/0-10V signals output by temperature, pressure, and flow sensors), performs signal conditioning and AD conversion. SAI810 and SAI830 support single ended/differential input, with a maximum resolution of 16 bits, and have cold end compensation (thermocouple input model) and signal filtering functions to reduce on-site noise interference

The Analog Output (AO) module converts the digital control signals output by the system into analog signals (4-20mA/0-10V), and controls analog actuators such as regulating valves and frequency converters. SAO810 and SAO820 have high output accuracy (error ≤± 0.1% of full scale), support "manual output" function (fixed values can be output without system instructions during debugging), and have short-circuit protection

Common technical characteristics

High reliability design: All modules use "industrial grade components" with a working temperature range covering -40 ℃~70 ℃ and a humidity tolerance range of 0~95% (non condensing). Some modules have an IP20 protection level (suitable for installation in control cabinets) and are suitable for harsh industrial environments.

Isolation and anti-interference: The module adopts "photoelectric isolation" or "magnetic isolation" technology internally, and the input/output circuit is isolated from the system power circuit (isolation voltage ≥ 2500V DC), effectively suppressing on-site common mode interference and series mode interference, and ensuring signal transmission stability.

Hot swappable function: Supports "online hot swappable". When replacing modules, the system power does not need to be cut off, only the connection between the module and the base needs to be disconnected, reducing system downtime and improving operation and maintenance convenience (some early models need to confirm whether this function is supported, please refer to the specific model manual).

Diagnosis and status indication: Each module is equipped with LED status indicator lights (such as "power normal", "signal normal", "fault alarm"), which can intuitively judge the operating status of the module; Simultaneously supporting "remote diagnosis", monitoring the real-time status of modules (such as channel faults and overloads) through the DeltaV/Ovation system, and generating diagnostic reports.

Key module technical specifications

Core parameters of digital I/O module

Digital Input (DI) Module:

Input signal type: dry contact (no power supply), wet contact (external power supply, such as 24V DC).

Input voltage range: 18~30V DC (wet contact), dry contact supports "contact closing resistance ≤ 10 Ω, open circuit resistance ≥ 1M Ω".

Response time: fastest 1ms (high-speed DI models, such as SDI820), regular models ≤ 10ms.

Number of channels: A single module supports 8/16 inputs, with channels isolated from each other (some models use group isolation, such as every 4 channels).

Digital Output (DO) Module:

Output types: transistor output (24V DC, maximum load current 0.5A/channel), relay output (250V AC/30V DC, maximum load current 2A/channel).

Output protection: The transistor output has "short-circuit protection" (automatic current limiting in case of overload), and the relay output has "mechanical life ≥ 1 million times" (no load) and "electrical life ≥ 100000 times" (rated load).

Number of channels: A single module supports 8/16 outputs, and some models of relay output modules support "normally open/normally closed" configurable.

Simulate the core parameters of the I/O module

Analog Input (AI) Module:

Input signal types: current signal (4-20mA, 0-20mA), voltage signal (0-5V, 0-10V), thermocouple (J/K/T/E/R/S/B type), thermistor (RTD, Pt100, Cu100).

Resolution: The current/voltage input is 16 bits, and the thermocouple/RTD input is 18 bits (some high-precision models).