TRACER 4102/4202 System Manual
Section 3 Engineering Guidelines
612804202L1-1A
© 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 4102/4202 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 4102/4202 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 4102/4202 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 4102/4202 by conn24 V to the + terminal of the TRACER 4102/4202
power terminal block and ground (the most negative voltage) to the TRACER 4102/4202 – terminal.
Alternately, a -48V supply should be delivered to the TRACER 4102/4202 by connecting ground (the most
positive voltage) to the + terminal of the TRACER 4102/4202 power terminal block and -48 V to the –
terminal.
Fuse
The fuse holder, accessible from the rear panel of the TRACER 4102/4202, accepts a generic 1A, 250 V,
2-inch slow-blo fuse.
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 4102/4202
system, the fuse will blow.
Table 8. DC Power Connector Pinout
PIN
NAME
+ Voltage
– Voltage
1
-
Ground (GND)
– Voltage
2
+
+ Voltage
Ground (GND)
