GE Fanuc WESDAC D20C Control Module

Overview

The GE Fanuc WESDAC D20C serves as a versatile control module for industrial automation. It belongs to the WESDAC family, offering diverse input/output capabilities. This module excels in both digital and analog I/O, making it suitable for various industrial processes.

Specifications

• Processor:
  • 8-bit Freescale 68HC11 MPU
• Clock:
  • 2 MHz MPU clock

Memory

• EPROM: 24 KB
• Static RAM: 32 KB
• EEPROM: 512 bytes

Analog Inputs

• Physical: Plug-in daughter board for 16 bipolar, differential inputs
• Input Adapters: Check the Index for available input adapters
• Accuracy:
  • ±0.05% for voltage
  • ±0.1% for current
• Temperature Coefficient: ±10 ppm per °C
• Resolution: 14 bits plus sign
• Conversion Rate:
  • 275 ms for 16 inputs at 60 Hz
  • 328 ms for 16 inputs at 50 Hz
• Dynamic Range of Converter: 125% of normalized full-scale inputs

Control Outputs

• Physical: 8 relays plus two Master Trip/Close relays
• Output Configurations:
  • 8 T/C pairs
  • 6 T/C plus 1 R/L pairs
  • 4 T/C plus 2 R/L pairs
  • 2 T/C plus 3 R/L pairs
  • 4 R/L pairs
  • 8 isolated Form C contact outputs
• Contact Duration: Programmable from 1 to 215 ms or 1 to 215 s (protocol dependent)
• Contact Rating:
  • 60 W maximum
  • 3 A maximum
  • 220 VDC maximum (1 Form-C or -A contact)
• Coil Status Check: Executes every 500 µs
• Switches: Includes a local enable/disable switch

Isolation & Ratings

• Component Isolation Rating: 1500 Vrms
• Dielectric Rating: 1000 VDC

Connectivity

• D.20 Link Ports: 2 available
• Maintenance Port: Operates at 9600 baud, RS-232

Power Requirements

• Typical: Requires 20-60 VDC, 5 W
• Full Load: Needs 11 W with 24 V contact wetting

Size

• D20C Assembly: Measures 19" x 5.25" x 2.5"