
9.2 Power Supply Circuit
Description
The module comprises the following circuits:
• Fuses
• ON/OFF Switch
• Input Filter
• Power Alarm Failure Relay
• dc/dc Converter (2)
• Output Filter
Fuses
48V
125V
250V
F1, F2
3A
1.6A
3/4A
ON/OFF Switch
S1 - Pushbutton Switch (DPDT)
When in the “ON” position (pins 1 and 4), dc
current flows through the input filter to the dc/dc
converter.
Input Filter
The input filter (C1, C2, C3) contains zener diodes
(Z1, Z2) that provide protection against surges, a
diode (D1) that provides protection against
reverse polarity, a differential choke XFMR (L1),
and the Red Input LED1.
Power Alarm Failure Relay
This circuit includes:
• K1 - Alarm Relay
• J1 - Jumper (NO/NC)
Versions G04, G05, and G06 are without alarms.
In versions G01, G02, and G03 the field-selec-
table option can change the alarm contact
de-energized state to NO or NC. (It is currently
shipped in the NC de-energized state, and can be
changed to NO if desired.)
DC/DC Converter
The two dc/dc converters (PS1 and PS2) operate
at a maximum of 1 MHz and, as a result,
switching noise is outside the 30-535 kHz range of
the TC–10B/TCF–10B. The converter outputs,
+20 Vdc and -20 Vdc, is fed to the output filter.
(See Figure 9-1.)
Output Filter
The output filter for the +20 V consists of C4, C6,
C8, and Z4. The output filter for the -20 V consists
of C5, C7, C9, and Z3.
9.3 Power Supply
Troubleshooting
The three test jacks on the control panel:
• TP3 (+20 Vdc)
• TP2 (Common)
• TP1 (-20 Vdc)
can be used to determine if the two voltages (+20
Vdc, -20 Vdc) are present. In addition, the LED2
output indicates that the dc/dc converters are
generating voltage. The LED1 input indicates that
voltage is present at the input of the dc/dc
converter.
For basic troubleshooting, perform the following
procedure:
1. If LED1 is not on with the module de-
energized, remove and check the fuses (F1,
F2) with an ohmmeter.
2. With the module de-energized, check the
ON/OFF switch (S1) with an ohmmeter to be
sure it opens and closes accordingly..
3. If LED2 is not on with the module energized,
check the +20 V and -20 V outputs at TP3 and
TP1, respectively. The one with voltage
absent will require replacement of the associ-
ated dc/dc converter.
January 1996
Page 9–3
Chapter 9. Power Supply Module
9
!
CAUTION
BE CAREFUL NOT TO MISPLACE SCREWS,
SPRING WASHER OR INSULATING WASHER
USED FOR MOUNTING TRANSISTORS.
Содержание TCF-10B
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Страница 19: ...Figure 1 1 TCF 10B Transceiver Set 1355D19 Sheet 1 of 4 April 1997 Page 1 5 Chapter 1 Product Description 1 ...
Страница 21: ...April 1997 Page 1 7 Chapter 1 Product Description 1 Figure 1 3 TCF 10B Receiver Only Set 1355D19 Sheet 3 of 4 ...
Страница 32: ...Page 1 18 April 1997 TCF 10B System Manual Technologies Inc USER NOTES ...
Страница 49: ...December 1996 Foigure 2 15 TCF 10B Catalog Numbers Module Style Numbers 1355D19 Page 2 17 ...
Страница 53: ...Page 3 4 April 1997 TCF 10B System Manual Technologies Inc Figure 3 2 Cable Termination Diagram 9651A13 ...
Страница 57: ...Page 3 8 April 1997 TCF 10B System Manual Technologies Inc USER NOTES ...
Страница 58: ...April 1997 Figure 3 3 TC 10B TCF 10B Mechanical Outline Drawing 1354D48 Page 3 9 ...
Страница 59: ...Page 3 10 Figure 3 4 TCF 10B Connection Drawing and Jumper Options 2064D87 Sheet 1 of 2 April 1997 ...
Страница 60: ...April 1997 Figure 3 5 TCF 10B Connection Drawing and Jumper Options 2064D87 Sheet 2 of 2 Page 3 11 ...
Страница 62: ...Page 4 2 January 1996 TCF 10B System Manual Technologies Inc Figure 4 1 Extender Board ...
Страница 88: ...Page 6 12 April 1997 TCF 10B System Manual Technologies Inc 8 RECEIVER LOGIC ...
Страница 89: ...April 1997 Page 6 13 Chapter 6 Routine Adjustment Procedures 6 ...
Страница 95: ...April 1997 Figure 7 1 TCF 10B Functional Block Diagram 1354D13 Page 7 5 ...
Страница 103: ...Page 9 4 January 1996 TCF 10B System Manual Technologies Inc Figure 9 2 TC 10B TCF 10B Power Supply Schematic 1617C39 ...
Страница 110: ...January 1996 Page 10 5 Chapter 10 Keying Module 10 Figure 10 1 TCF 10B Keying PC Board 1606C50S ...
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Страница 190: ...Page 16 8 Figure 16 8 3 Frequency Directional Comparison Functional Block Diagram April 1997 ...
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Страница 223: ...April 1997 Page 18 9 Chapter 18 Optional Voice Adapter Module 18 Figure 18 4 TC 10B Interconnecting Diagram 7833C63 ...
Страница 224: ...Page 18 10 April 1997 TCF 10B System Manual Technologies Inc Figure 18 5 TC 10B Connections for Alarm Circuit 7833C63 ...
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Страница 242: ...Page 19 10 January 1996 TCF 10B System Manual Technologies Inc Figure 19 7 Table 19 1 Timing Diagram ...
Страница 243: ...January 1996 Page 19 11 Chapter 19 Optional Trip Test Unit TTU 19 Figure 19 7a Table 19 1a Timing Diagram ...