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TRACER 4106/4206 System Manual Section 3 Engineering Guidelines
612804206L2-1A © 2004 ADTRAN, Inc. 31
Alarm Contacts (Plug-In Terminal Block)
An RF link down condition is indicated with both normally open (NO) and normally closed (NC) alarm
contacts on the rear panel of the TRACER 4106/4206 system. In normal operation, the NC contact is
electrically connected to the common contact (COM) and the NO contact is isolated. When the RF link
drops, the NC contact becomes isolated and the NO is electrically connected to COM. This allows RF
down conditions to be reported to external alarm monitoring systems.
DC Power Connection (Plug-In Terminal Block)
The TRACER 4106/4206 can operate from a supply between 21 and 60 VDC, with either polarity
referenced to ground, and consumes less than 20 Watts (W). Power supplies should be able to provide up to
30 W at the selected voltage. Current required (in Amps) is determined by dividing the power consumed
(in Watts) by the applied voltage (in Volts). For example, at 48 V, TRACER 4106/4206 would draw
approximately 0.417 A (20 W/48 V).
The + terminal of the DC power connection must be connected to the most positive voltage rail, while the
– terminal must be connected to the most negative voltage rail. For example, a +24 V source should be
delivered to the TRACER 4106/4206 by connecting +24 V to the + terminal of the TRACER 4106/4206
power terminal block and ground (the most negative voltage) to the TRACER 4106/4206 – terminal.
Alternately, a -48V supply should be delivered to the TRACER 4106/4206 by connecting ground (the most
positive voltage) to the + terminal of the TRACER 4106/4206 power terminal block and -48 V to the –
The fuse holder, accessible from the rear panel of the TRACER 4106/4206, accepts a generic 1A, 250 V,
2-inch slow-blo fuse.
Antenna Interface (N-Type connector)
The ANTENNA interface (N-Type connector) connects to the customer-supplied antenna using standard
antenna feedline cable. When determining the cable specifications for your application, refer to Section 2,
Microwave Path Engineering Basics (System Losses (L) on page 18) for a discussion on cable length and
Table 7. Alarm Contact Connector Pinout
PIN NAME DESCRIPTION
1 COM Common Contact
2 NO Normally-Open Contact
3 NC Normally-Closed Contact
If the power supply voltages are incorrectly connected to the TRACER 4106/4206
system, the fuse will blow.
Table 8. DC Power Connector Pinout
PIN NAME + Voltage – Voltage
1 - Ground (GND) – Voltage
2 + + Voltage Ground (GND)