User's Manual

Collision Avoidance System: CAS-CAM/RF® Operating Instructions
Document Number: CAS-CAM_RF Operating Instructions (with FCC
precautions)_18June2010.doc
Page 25 of 126
Issue: E
4.2.4 Front / Rear RF Unit (PROD0239 / PROD0169)
Figure 6: Heavy Vehicle (HV) RF Unit (Front – PROD0239 / Rear – PROD0169)
The Heavy Vehicle (HV) RF Unit is available in both Front and Rear models for mounting
at the front and rear of the vehicle respectively. Rear mounted versions are typically
located above the rear axle of large rear dump trucks; front mounted versions are typically
located in front of the grill on the driver access ladder. The unit receives the transmitted
signal from the other RF units and also continuously transmits a signal for triggering
alarms on the remote tags when located within the programmed detection range.
Optional Side RF Units (Left RF Unit, Right RF Unit) are available for effective 360 degree
close-range start-up object detection, whereas Front & Rear RF Units only provide partial
blind-spot object detection at the expense of long range detection directly in front or
behind.
Features:
• IP 56 rated enclosure
• Low power RF transceiver operates in LIPD class license for unlicensed bands
• Digital RF data transmission with full error control
• Detection angles typically in range 90 – 120 degrees at rear (including detection in rear
tyre path) and 180 degrees at front.
• Power supply 12VDC, 100mA maximum
(Note: The Display Unit, Expansion Unit, Camera Units and RF Units can be
permanently powered from the Heavy Vehicle battery with the Display Unit screen
powering down after a preset timeout period when the vehicle is not in forward or
reverse gear (if enabled). This function conserves battery life and enables the RF
tagging to still be active when the vehicle is unattended for the benefit of other vehicles.