User's Manual

SECTION I INTRODUCTION
SM 7063 07/97 1-5
1.6 CDU SPECIFICATIONS
Parameter Specification
Physical:
Overall Dimensions H = 4.25”, W = 10.75”, D = 8.25”
Weight 9 lbs
Environmental:
Operating Temperature Range
0 C to +60 C
Storage Temperature Range
-55 C to +100 C
Humidity
95% non-condensing at 40 C, 96 hour exposure
Vibration - any axis, peak-to-peak 5 - 15 Hz: 0.5g; 15 - 500Hz: 3.0 g
Shock - (11 msec triangular, 3 planes) 20 g
Altitude -300 to +15000 feet MSL
Power Requirements:
72 VDC Locomotive Power, Floating 58 VDC (min); 72 VDC (nom); 86VDC (max)
Current Consumption @ 72 VDC 0.35 A (typ); 1.5 A (max)
13.6 VDC Power Input (Negative Ground) 13.6 VDC (min/nom); 14.3 (max)
Current Consumption @ 13.6 VDC 1.0 A (typ); 4.0 (max)
Radio Transceiver:
Transmit Frequency 452.9375 MHz (AAR typ); 450 - 475 MHz (available)
Transmit Power 2 Watts (standard); 4 Watts (Configurable)
Transmit Frequency Stability 5 ppm
Emission 16K0F2D
Deviation (at 1200 Hz) 3.3 KHz
Receive Frequency 457.9375 MHz (AAR typ); 450 - 475 MHz (available)
Receive Sensitivity (-12 dB SINAD) 0.45 uV (max)
Receive Frequency Stability 10 ppm (max)
Selectivity 60 dB (min)
Intermodulation Immunity 60 dB (min)
Spurious Rejection 55 dB (min)
Image Rejection 50 dB (min)
Odometer Interface:
Input from Axle Alternator 20 ppr or 60 ppr
Wheel Diameter Calibration Range 34.00” (min); 40.00” (default); 46.00” (max)
Datalogger Interface:
Asynchronous Serial Data Rate 300 to 9600 Baud
Voltage Level EIA RS-232C
Data Format Configurable Parity, Stop Bits, and Data Bits
PC Diagnostic Interface:
Asynchronous Serial Data Rate 9600 Baud, 1 Stop Bit, 8 Data Bits
Voltage Level EIA RS-232C
Table 1-3. CDU Specifications