P3602ACMC datasheet(103/212 Pages) TECCOR

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exceed 10 mAPK at any time. As an alternative to carrying out this test

on the complete equipment or device, the test may be carried out

separately on components, subassemblies, and simulated circuits,

outside the unit, provided that the test results would be representative of

the results of testing the complete unit.

Figure 3.17 T1/E1 Protection

The peak voltage for 120 V rms is 169.7 V. The minimum stand-off voltage for the P1800 is

170 V, therefore, the P1800SC MC will pass the test in Section 4.4.5.2 by not allowing

10 mA of current to flow during the application of this test voltage.

For the transceiver side of the coupling transformer, additional overvoltage protection is

shown in Figure 3.17 using the P0300SA SIDACtor device. When an earth ground

connection is not used, only metallic protection is required. Metallic protection is satisfied

using a single P0640SC MC SIDACtor device across Tip and Ring and a single F1250T

TeleLink fuse on either Tip or Ring.

Component Selection

The “SC MC” SIDACtor device and F1250T TeleLink fuse were chosen because these

components meet GR 1089 surge immunity requirements without the use of additional

series resistance. An MC is chosen to reduce degradation of data rates. The voltage rating

of the P1800SC MC was selected to ensure loop powering up to 150 V. The voltage rating

of the P0640SC MC was selected to ensure coordination with varying voltage signals.

Transceiver

P0300SA

P1800SC MC

F1250T

P0640SC MC

Power

Source

P0640SC MC

P1800SC MC

F1250T

P0300SA

Transceiver

COT

Regenerator

F1250T

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