BECKHOFF EL30xx Series 12 Bit Analog Input Terminal Manual

BECKHOFF EL30xx Series 12 Bit Analog Input Terminal Manual

Full range product classification and core parameters

EL30xx is a 12 bit resolution analog input module (internal 12 bits, communication output converted to 16 bit format), divided into 6 sub series according to signal type, wiring method (single ended/differential), and channel number, including 1/2/4/8 channels. All modules have a uniform physical size of 15 × 100 × 70mm (installation width 12mm), protection level IP20, working temperature of * * -25 ℃~+60 ℃ (extended temperature zone), storage temperature of -40 ℃~+85 ℃ * *, relative humidity ≤ 95% (no condensation).

1. Overview of functions and parameters of the six sub series

(1) EL300x series: ± 10V single ended input

Model: EL3001 (1 channel), EL3002 (2 channels), EL3004 (4 channels), EL3008 (8 channels)

Signal range: -10 V~+10 V, input impedance>130 k Ω

Sampling: default 50Hz filtering, single channel typical conversion time 0.625ms, 8-channel 1.25ms, filtering cutoff frequency 1kHz

Accuracy: Error ＜ ± 0.30% of full range at 0-55 ℃, extended temperature range ＜ ± 0.5%

Features: Single ended input, no built-in sensor power supply.

(2) EL301x series: 0~20 mA differential input

Model: EL3011 (1-channel), EL3012 (2-channel), EL3014 (4-channel)

Signal range: 0~20 mA, internal impedance of approximately 85 Ω+diode voltage drop

The maximum common mode voltage is 10V, and each channel has an independent error indicator light that can detect wire breakage and over range.

(3) EL302x series: 4-20 mA differential input

Model: EL3021 (1-channel), EL3022 (2-channel), EL3024 (4-channel)

Signal range: 4~20 mA (industrial standard current signal), differential wiring, standard disconnection and over range detection;

The electrical and timing parameters are consistent with EL301x.

(4) EL304x series: 0~20 mA single ended input

Model: EL3041 (1 channel), EL3042 (2 channels), EL3044 (4 channels), EL3048 (8 channels)

Signal: 0~20mA single ended input, the terminal can supply power to two-wire sensors externally, with overload alarm.

(5) EL305x series: 4~20 mA single ended input

Model: EL3051 (1-channel), EL3052 (2-channel), EL3054 (4-channel), EL3058 (8-channel)

Signal: 4~20mA single ended input, supports 2/3/4 wire sensors, built-in 24V power supply circuit, compatible with mainstream transmitters on site;

Equipped with hardware indicator lights for disconnection and over range.

(6) EL306x series: 0~10V/0~30V single ended input

Model: EL3061 (1-channel), EL3062 (standard 0~10V/special 0~30V), EL3064 (4-channel), EL3068 (8-channel)

Basic version: 0~10V, EL3062-0030 special version supports high voltage input of 0~30V;

The input impedance is greater than 130 k Ω, and the rest of the timing and accuracy are the same as the standard of the entire system.

2. General electrical characteristics

Power supply: Powered by the E-Bus bus, with a typical power consumption of 130mA;

Electrical isolation: E-Bus and on-site isolation voltage of 500V;

Communication: The entire system does not support distributed clock (DC);

Process data: Each channel defaults to 2 bytes of status+2 bytes of value, no additional address configuration required, plug and play.

EtherCAT Communication Fundamentals

1. Wiring and hardware requirements

Cable: Cat5 and above Ethernet cables are used, RJ45 interfaces are used, only 4 signal cables are used, and the maximum distance between devices is 100m; direct/cross Ethernet cables are supported (automatic recognition);

E-Bus bus: The maximum output of the bus coupler is 2A. When the current is insufficient, EL9410 and other feeding terminals need to be installed, and the entire terminal must be grounded.

2. Watchdog mechanism

Built in SM synchronization manager watchdog, PDI process data watchdog, default timeout of 100ms:

Automatically switch the device to a safe state when communication is interrupted;

The timeout multiplier and time can be configured in TwinCAT, with an adjustable range of 0-170 seconds.

3. EtherCAT state machine

The device switches between 5 standard states when powered on, providing graded control for communication and operation:

Init: Initialization, no communication;

Pre op: Only available for email communication, no periodic process data;

Safe op: Process data is refreshed normally, and the output is locked in a safe state;

Op: Normal operation, fully functional enabled (main working state);

Boot: Dedicated for firmware upgrade, prohibited from use under normal operating conditions.

4. CoE interface (CANopen over EtherCAT)

Core parameter configuration interface, using index+sub index (hexadecimal) to manage parameters:

0x1000 segment: read-only identity information such as device name, manufacturer, serial number, etc;

0x6000/0x7000: Periodic Process Data PDO;

0x8000 segment: operating parameters such as analog filtering, range, calibration, etc;

Additional features: Supports NoCoeStorage (turning off parameter power-off saving to protect EEPROM) and Startup List (automatically loading parameters when powered on).

5. Distributed Clock (DC)

The EL30xx series does not support DC synchronization, so there is no need to configure clock related parameters.

Mechanical installation and wiring specifications

1. ESD electrostatic protection

Before operation, static electricity must be released from the human body, and touching the end bullets is prohibited; EL9011/EL9012 end caps need to be installed at the end of the bus to ensure protection and anti-static effects.

2. Installation of guide rails

Installation base: Standard 35mm DIN rail, the rail must be reliably grounded;

Disassembly and assembly: After turning off the power, pull the orange buckle to unlock, and do not forcefully break it; The modules are tightly connected without gaps;

Mechanical reinforcement: In high vibration scenarios, fixed guide rails are required, and the number of modules in a single string is limited to meet EN 60068 vibration/impact standards.

3. Wiring rules

Terminal type: All models use screw free spring terminals, compatible with 0.08-2.5mm ² cables;

Shielding requirements: Analog signal lines must use shielded twisted pair cables, with a single point grounding on the shielding layer;

Special requirements for current signal (0/4~20mA): Strictly control the common mode voltage Ucm, exceeding 10V will cause measurement errors; 1/2 of the module's internal GND can be connected to an external potential, and 4 of the module's GND can be shorted to 0V from the power supply. Mixing high and low side sensors is prohibited;

Power supply: The on-site sensor power supply circuit needs to match the SELV safety ultra-low voltage specification.

4. LED status indication

Divided into RUN running light (green) and ERROR fault light (red), the entire series has a unified logic:

RUN off: Init/Boot status;

RUN flashing: Pre Op status;

RUN single flash: Safe On state;

RUN constantly on: Normal Op state;

ERROR on: corresponds to channel disconnection, over range, and hardware failure.

5. Certification requirements for special working conditions

ATEX Explosion proof: Standard temperature range of 0-55 ℃, extended temperature range of -25~60 ℃. The equipment needs to be enclosed in an IP54 or higher shell, and plug-in connections are prohibited when live;

UL certification: Requires 4A fuses or NEC Class2 power supply, prohibited from connecting to telecommunications lines.

TwinCAT configuration and debugging (supports TwinCAT 2/TwinCAT 3)

1. Pre preparation

Driver: Install TwinCAT real-time Ethernet driver on PC network card to distinguish correct/incorrect configuration;

ESI file: EtherCAT device description file, which needs to be updated regularly and can be upgraded online through software built-in tools;

Two configuration modes:

Offline configuration: Plan and configure in advance when there is no hardware available;

Online configuration: Automatically scan and identify modules after connecting hardware.

2. Standard configuration process

Enter TwinCAT, create a new project and bind the EtherCAT master network card;

Online scanning/offline manual addition of EL30xx module;

Select PDO process data mode (standard/compact);

Configure CoE parameters: filtering, range, upper and lower limits, calibration parameters;

Variable association, compilation, activation configuration, start PLC operation.

3. Process data and operating mode

1. Two PDO formats

Standard mode: Each channel transmits 2 bytes of numerical values+2 bytes of status words (including over range, under range, and error bits);

Compact mode: only transmits 2-byte measurement values, reducing bus load.

2. Three major operating modes

FreeRun (default): Filtering is enabled, sampling is triggered by a timer, and the update cycle varies with the filtering;

Synchron (frame triggered): Disable filtering, follow EtherCAT cycle communication, and respond faster;

DC mode: EL30xx is not supported and cannot be enabled.

3. Digital filters

Built in FIR (50Hz/60Hz notch) and IIR filters. The 50Hz FIR filter attenuates power frequency interference by more than 50dB, and the filtering parameters are globally unified (only channel 1 index can be configured). Enabling the filter will extend the sampling time.

4. Data Conversion and Calibration

Data flow: ADC raw data → filtering → manufacturer calibration → user calibration → user scaling → final process data;

Support factory calibration by manufacturers and user-defined calibration, with the ability to set offset and gain parameters;

Range determination: Built in over range and under range detection, triggered by status word and fault light synchronous alarm, with automatic numerical limiting.

5. Programming support

Compatible with IEC 61131-3 full programming languages (ST, LD, FBD, IL, SFC, etc.), it can achieve analog quantity acquisition, threshold judgment, and alarm logic.

Fault diagnosis, maintenance, and firmware

1. Third level diagnostic method

Hardware LED: Quickly locate channel faults and communication status;

Process data status word: Read over range, under range, hardware error;

CoE diagnostic register: View temperature, raw ADC value, and detailed fault codes.

2. Common faults and causes

Communication abnormalities: network cable damage, insufficient E-Bus power supply, watchdog timeout, abnormal device status;

Inaccurate measurement: common mode voltage exceeding the standard, poor shielding, improper filtering parameters, calibration offset;

Alarm constantly on: sensor disconnection, signal exceeding range, wiring error.

3. Firmware and device maintenance

Firmware classification: Controller firmware (. efw), FPGA firmware (. rbf), supports single/batch upgrades;

Factory reset: Perform parameter reset through CoE index;

Spare parts replacement: High revision modules can directly replace lower versions without the need for reconfiguration.