User's Manual

Installation
RFI-148 & RFI-900 High Output Power Paging Transmitters User Manual Page 10 of 134
6. Power Supply Input: The power supply input is model-specific. The AC input connector is shown in
Figure 1.
a. 24VDC Model: 20 to 31.2 VDC input range for 24 V nominal. Phoenix terminal block
connector.
b. -48VDC Model: -40.5 to -57 VDC input range for -48 V nominal. Phoenix terminal block
connector.
c. 110/240VAC Model: 100 to 250 VAC, 50 to 60 Hz
7. RF Diag: Sniffer port for diagnostics. TNC female connector.
8. 24V DC Output (RFI-900 only): Enabled via Cruise Control (Encoder Interface → 24 V DC Output),
the RFI-900 can source up to 2A at 24V to an external load. Phoenix terminal block connector (plug
supplied).
9. LIU Interface: Combined alarm and encoder interface. DC-37 female connector.
10. RS-232: Rear serial port.
a. RFI-148: DE-9 male connector (DTE)
b. RFI-900: DE-9 female connector (DCE).
2.3.1 Installation Guidelines to Ensure Safe Exposure Levels
The following installation guidelines ensure that safe exposure levels to radio frequency radiation are not
exceeded:
1. Ensure the unit is switched off, and the mains power supply is unplugged.
2. Properly connect antennas, and RF cabling.
3. Connect other cabling, leaving power cables last.
4. Ensure that country and region specific safe distance limits are met before powering and operating the
unit, using physical exclusion barriers if necessary.