Siemens
СРЕДСТВА ПРОМЫШЛЕННОЙ АВТОМАТИЗАЦИИ
официальный партнер Сименс
Каталог СА01 2016
архивный
(4872) 700-366
skenergo@mail.ru

Characteristic values of the pulse tachometer evaluation electronics
Incremental encoders, input pulse levels

The evaluation electronics can process encoder signals (symmetrical as well as asymmetrical) up to a max. differential voltage of 27 V. The encoder type is selected via parameter. The evaluation electronics are adjusted electronically to the encoder signal voltage. With the parameter setting, a sub-division is made into two rated input voltage ranges.

 

Rated input voltage range

 

5 V

15 V

Low level

Differential voltage < 0.8 V

Differential voltage < 5 V

High level

Differential voltage > 2 V

Differential voltage > 8 V 1)

Hysteresis

> 0.2 V

> 1 V

Common-mode controllability

± 10 V

± 10 V



If the incremental encoder does not supply any symmetrical encoder signals, it must be grounded with each signal cable twisted in pairs and connected to the negative connections of track 1, track 2, and zero mark.

Incremental encoder, maximum frequency that can be evaluated

The max. frequency of the encoder pulses that can be evaluated is 300 kHz. To ensure the encoder pulses are evaluated correctly, the minimum edge clearance Tmin between two encoder signal edges (track 1, track 2), as listed in the table, must be adhered to.

 

Rated input voltage range

 

5 V

15 V

Differential voltage 2)

2 V

> 2.5 V

8 V

10 V

> 14 V

Tmin3)

630 ns

380 ns

630 ns

430 ns

380 ns



If the incremental encoder is incorrectly matched to the encoder cable, disturbing cable reflections will occur at the receiving end. To ensure that encoder pulses of this type can be evaluated without errors, these reflections need to be damped. The limit values listed in the table below must be maintained in order to prevent the resulting power losses in the evaluation electronics adaptor from being exceeded.

 

Fmax

 

50 kHz

100 kHz

150 kHz

200 kHz

300 kHz

Differential voltage 4)

Up to 27 V

Up to 22 V

Up to 18 V

Up to 16 V

Up to 14 V



Incremental encoder, cable, cable length, shield support

The encoder cable capacitance must be recharged at each encoder edge change. The rms value of this current is proportional to the cable length and pulse frequency, and must not exceed the current permitted by the encoder manufacturer. A suitable cable that meets the recommendations of the encoder manufacturer must be used, and the max. cable length must not be exceeded.

Generally speaking, a twisted cable pair with a single pair shield is sufficient for each track. This reduces crosstalk between the cables. Shielding all the pairs provides protection against interference pulses. The shield should be connected to the SINAMICS DC MASTER Cabinet shield bar through a large surface area.

1) Restriction: See "Maximum frequency that can be evaluated"

2) Differential voltage at the terminals of the evaluation electronics

3) The phase error LG (deviation of 90°), caused by the encoder and cable and which is permissible, can be calculated from Tmin:
LG = + (90° - fp ? Tmin ? 360° ? 10-6)

LG Phase error in °

fp Pulse frequency in kHz

Tmin Minimum edge clearance in ns

4) Differential voltage of the encoder pulses without load (approximate encoder power supply voltage)

















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Арматура DENDOR

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Датчики и измерители

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Регуляторы и регистраторы

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Пневматическое оборудование

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Краны и Клапаны

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Измерительные приборы

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Системы беспроводного управления «умный дом»

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Бесконтактные выключатели Конечные выключатели Оптические датчики Энкодеры

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SKW-FS - Установка умягчения

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SKW-FK - Установка обезжелезивания
Каталог оборудования 2016
Каталог продуктов Siemens Industry Приводная техника Преобразователи Стандартные преобразователи Преобразователи на среднее напряжение Преобразователи постоянного тока SINAMICS DCM Преобразователь постоянного тока SINAMICS DCM Шкафного исполнения Введение Введение Шкаф SINAMICS DCM Опции Инженерная информация Dynamic overload capability Parallel connection and 12-pulse operation Supply of high inductances Protection against condensation Characteristic values of the pulse tachometer evaluation electronics Notes for EMC-compliant drive installation Harmonics Программное обеспечение и конфигурирование Сервис Список аббревиатур SIMOREG DC-MASTER SIMOREG CM SIMOREG CCP Двигатели переменного тока Мотор-редукторы Flender Gear Units Couplings Инструментальное программное обеспечение Дополнительные компоненты Техника автоматизации Автоматизация и безопасность зданий Низковольтная коммутационная техника Технология безопасности Системные решения и продукты для отраслей Сервис ... и все, что Вам еще необходимо




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