Search:
  Quote Basket  |  Sitemap  |  Imprint
  • Deutsch
  • English

SCM5B45

Frequency Input Signal Conditioners, Response time up to 20 msec

Each SCM5B45 frequency input module provides a single channel of frequency input which is isolated and converted to a high-level analog voltage output. This voltage output is logic switch controlled, which allows these modules to share a common analog bus without the requirement of external multiplexers.

The frequency input signal can be a TTL level signal or a zero-crossing signal. Terminal 3 on the field-side terminal block is the “common” or ground connection for input signals. A TTL signal is connected from terminal 2 to terminal 3, while a zero-crossing signal is connected from terminal 4 to terminal 3. Input circuitry for each of the signal types has hysteresis built in. An input signal must cross entirely through the hysteresis region in order to trigger the threshold comparator.

A 5.1 V excitation is available for use with magnetic pick-up or contact-closure type sensors. The excitation is available on pin 1 and the excitation common is pin 3.

The SCM5B modules are designed with a completely isolated computer side circuit which can be floated to ± 50 V from Power Common, pin 16. This complete isolation means that no connection is required between I/O Common and Power Common for proper operation of the output switch. If desired, the output switch can be turned on continuously by simply connecting pin 22, the Read-Enable pin, to I/O Common, pin 19.

A special circuit in the input stage of the module provides protection against accidental connection of power-line voltages up to 240 VAC.

Circuit diagram Dataforth SCM5B45

Block Diagram SCM5B45



PDF Downloads:


16 Modules for Type SCM5B45:

ModuleInputDescription
SCM5B45-01 0 to 500 Hz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-02 0 to 1 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-03 0 to 3 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-04 0 to 5 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-05 0 to 10 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-06 0 to 25 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-07 0 to 50 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-08 0 to 100 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-21 0 to 500 Hz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-22 0 to 1 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-23 0 to 3 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-24 0 to 5 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-25 0 to 10 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-26 0 to 25 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-27 0 to 50 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output
SCM5B45-28 0 to 100 kHz SCM5B45 Isolated Frequency Input Module with Voltage-Output

Specifications

top
  • Input: Frequency up to 100 kHz
  • Output: 0 … 5 V or 0 … 10 V
  • TTL level and Zero Crossing
  • Isolation 1500 Vrms
  • Input protection 240 Vrms
  • Input Resistance 100 kOhm
  • Accuracy ± 0.05%
  • Linearity ± 0.02%
  • ANSI/IEEE C37.90.1 Input protection
  • CMR 120dB
  • True 3-way isolation
  • Response Time 20 ms to 300 ms
  • Power Supply +5 VDC
  • Operating Temperature Range -40°C … +85°C
  • Mix and Match Types on Backpanels possible
  • Dimensions 58 x 57 x 15 mm
  • Optional DIN Rail Mounting
  • CSA certified, CE and ATEX compliant
  • Wide range of accessories
  • Special Solutions on request