ADTRAN 12804108L1A System Manual

ADTRAN 12804108L1A System Manual Manual pdf 31 page image

TRACER 4108/4208 System Manual Section 3 Engineering Guidelines612804208L1-1B © 2003 ADTRAN, Inc. 31T1 Connections (RJ-48C)The physical T1 interfaces are provided by eight RJ-48C jacks that comply with the applicable ANSI andAT&T ® standards.Alarm Contacts (Plug-In Terminal Block)Normally open (NO) and normally closed (NC) alarm contacts are provided on the rear panel of theTRACER 4108/4208 system. In normal operation, the NC contact is electrically connected to the commoncontact (COM) and the NO contact is isolated. During an alarm condition, the NC contact becomesisolated and the NO is electrically connected to COM. This allows alarm conditions to be reported toexternal alarm monitoring systems.DC Power Connection (Plug-In Terminal Block)The TRACER 4108/4208 can operate from a supply between 21 and 60 VDC, with either polarityreferenced to ground, and consumes less than 21 Watts (W). Power supplies should be able to provide up to25 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 4108/4208 would drawapproximately 0.438 A (21 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 bedelivered to the TRACER 4108/4208 by connecting +24 V to the + terminal of the TRACER 4108/4208power terminal block and ground (the most negative voltage) to the TRACER 4108/4208 – terminal.Alternately, a -48V supply should be delivered to the TRACER 4108/4208 by connecting ground (the mostpositive voltage) to the + terminal of the TRACER 4108/4208 power terminal block and -48 V to the –terminal.Table 6. T1 Interface Connector PinoutPIN NAME DESCRIPTION1 R Transmit data (ring) towards the network2 T Transmit data (tip) towards the network3, 6-8 UNUSED —4 R1 Receive data (ring) toward the network5 T1 Receive data (tip) from the networkTable 7. Alarm Contact Connector PinoutPIN NAME DESCRIPTION1 COM Common Contact2 NO Normally-Open Contact3 NC Normally-Closed ContactIf the power supply voltages are incorrectly connected to the TRACER 4108/4208system, the fuse will blow.