DP820 Incremental Pulse Counter Module

Features

• Number of Channels: Two channels.
• Transducer Signal Levels: RS422, 5 V, 12 V, 24 V, and 13 mA interfaces.
• Simultaneous Measurement: Pulse count and frequency measurement.
• Pulse Count: Bidirectional 29-bit counter for length/position measurement.
• Frequency Measurement: Range from 0.25 Hz to 1.5 MHz.

Description

The DP820 is a two-channel pulse counting module designed for incremental pulse transmitters with a frequency range of up to 1.5 MHz. Each channel includes counters and registers for position/length and speed/frequency measurement. It provides balanced inputs for connecting pulse transmitters, along with digital input and output options.

Signal Compatibility

Pulse transmitters with RS422, +5 V, +12 V, +24 V, and 13 mA interfaces can be connected to the DP820 module.

Technical Specifications

• Power Supply Voltage: 24 V d.c. (12 to 32 V d.c.)
• Max Non-destructive Voltage on Inputs: 30 V d.c.
• Maximum Field Cable Length: 200 m
• Cable Type: Shielded, twisted pair with a characteristic impedance of 100 ohms.
• Input Filters: Configurable for different pulse encodings and pulse widths.

Input Impedance and Voltage Range

• Impedance: 100 Ω characteristic impedance for A, B, and ST inputs.
• Voltage Range:
  • Input A, B, ST:
    • RS422/+5 V /13 mA Range: 2.5 V to 30 V
    • 12 V Range: -30 V to 1.0 V (External resistance)
    • 24 V Range: -30 V to 5.0 V
  • Input DI: 15 V to 30 V

Digital Output

• Max Load Current: 0.5 A
• Max Short Circuit Current: 2.4 A
• Max Leakage Current: 10 μA
• Max Output Impedance: 0.4 Ω

Measurement Accuracy

• Max Frequency Measurement Error: Relative error and absolute error included temperature drift.
• Resolution: Dependent on measuring time, with higher resolutions achieved with longer measuring times.

Power Consumption and Dissipation

• Current Consumption: 120 mA at 5 V (Modulebus)
• Power Dissipation: 2.5 W

Other Specifications

• OSP Timer: 256, 512, 1024 ms
• Process Voltage Supervision: 2 channels (1 per group)
• Isolation: Individually isolated channels
• MTU Compatibility: TU810, TU812, TU814, TU830, or TU833
• Rated Insulation Voltage: 50 V
• Dielectric Test Voltage: 500 V a.c.

Dimensions

• Width: 45 mm (1.77”)
• Depth: 102 mm (4.01”), 111 mm (4.37”) including connector
• Height: 119 mm (4.7”)
• Weight: 0.15 kg (0.33 lbs.)