HC5520
1kΩ
R
BAL
R
R
BH
BL
R
R
BH
R
BL
TPS
C
VRX
0.47µF
R
X
100kΩ
TIPSEN
TIP
R
X
100kΩ
V
RX
TIP
50Ω
1600Ω
200Ω
R
PT
SHDO
HC5520
C
1µF
20kΩ
RTD
-5V
C
R
RTD
PR
C
VTX
0.47µF
50Ω
RING
RING
SW
T
X
V
TX
RINGSEN
RD
100kΩ
T
100kΩ
X4W
R
RGS
R
4W
V
BAT
V
RINGING
FIGURE 8. RING TRIP DETECTION TEST CIRCUIT
PARAMETER
No Ring Trip Detection
Ring Trip Detection
INPUT
SW = Up
MEASUREMENT
SHDO
SPECIFICATIONS
SHDO = Hi
SW = Down
SHDO
SHDO = Lo
R
TPS
C
VRX
0.47µF
RX
100kΩ
TIPSEN
TIP
R
100kΩ
TIP
V
RX
X
50Ω
R
R
PT
V
T
PRI
1800Ω
HC5520
V
R
PR
C
VTX
0.47µF
50Ω
RING
RING
T
X
V
TX
RINGSEN
100kΩ
T
100kΩ
X4W
R
RGS
R
4W
POLARITY REVERSAL COMMAND
t
REV
V
T
90%
90%
V
R
FIGURE 9. POLARITY REVERSAL TIME TEST CIRCUIT AND WAVEFORMS
PARAMETER
Polarity Reversal Time
INPUT
MEASUREMENT
SPECIFICATIONS
Reversal Command
t
t
REV
REV
11
HARRIS [ HARRIS CORPORATION ]
