CPC1466
1.5 Sealing Current Monitor Characteristics
1.5.1 LED Trigger Characteristics
For test conditions: (see Figure 8 on page 8).
Parameter
Conditions
Symbol Minimum
Typical Maximum
Unit
V
Applied dc battery Voltage
Frequency (pulses per second)
Percent break
-
-
-
-
-
-
-
-
-
-
-43.5
4
-
-
-
-
-
-56
8
DC
-
40
60
%
-
Number of pulses
6
10
Total Loop Resistance
200
4000
Ω
Required opto-coupler response
Number of applied pulses per make/break
Pulse width (opto on)
-
-
-
1
-
-
-
-
-
T
(see Figure 8 on page 8)
(see Figure 8 on page 8)
10
10
ms
ms
ON
T
Pulse width (opto off)
-
OFF
Figure 8. Test Circuit for LED Operation
RLOOP
200Ω - 4kΩ
Series rotary dial
900Ω - 4.5kΩ (MLT)
VBAT
25Ω
1µF
-43.5V to -56V
+
85Ω
85mH
25Ω
Shunt rotary dial
RING
TIP
CPC1466
1µF
1
2
3
4
5
6
7
8
PR+
NC
16
15
14
13
12
11
10
9
TC
NC
NC
68.1Ω
TIP
NC
1%
1/4 W
VCC
5V
RS
1
2
3
6
5
4
NC
NC
PD
75kΩ
RING
NC
VOUT
2.2kΩ
5%
4W
NC
PR-
COM
8
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