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D20/D200 Technical Overview
• Communication Interface with D20ME consists of data control and formatting functions
that are called by common code using application interface tables. The formatting functions
place the requested data into an addressed buffer.
• Maintenance Interface implements several maintenance and diagnostic commands.
2.4.7.4 D20A Specifications
Item
Processor
Clock
Memory
Inputs
Input Impedance
Overall Accuracy
Temperature Coefficient
Resolution
Conversion Rate (all 32 inputs)
Over voltage Rating
Overload Rating
Common Mode Rejection (60 Hz)
Normal Mode Rejection (60 Hz)
Component Isolation Rating
Dielectric Rating
D.20 Link Ports
Maintenance Port
Power Requirements
Size
LED Indicators
52
Table 10 D20A Specifications
8-bit Freescale 68HC11 MPU
2 MHz MPU clock
•
32 KB EPROM
•
24 KB static RAM
•
512 bytes EEPROM
32 differential inputs (typical):
•
±5, ±10 V
•
±1, ±2.5, ±5, ±10, ±20 mA
44 Mohm ±5% (VDC)
±0.05% (voltage), ±0.1% (current)
±10 ppm per °C
12-bit plus sign
•
550 ms @ 60 Hz
•
656 ms @ 50 Hz
35 VDC
200 V pp ±5 V input common mode (50/60 Hz)
•
95 dB 5 V
•
90 dB 10 V
60 dB
1500 Vrms
1000 VDC
2
9600 baud, RS-232
20-60 VDC, 7 W typical
19" x 5.25" x 2.5"
•
Common LEDs, described in Section 2.2.1 , Hardware.
•
RED binary point LEDs, indicating the analog point that is
currently being read.
PRPI-019-3.00-10
GE Grid Solutions
Description
GE Information
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