Technical Instruction
Table Of Contents
- Nautel Limited
- MODULE EXCHANGE SERVICE
- 6.1 INTRODUCTION
- 6.2 WIRING LISTS NOT PROVIDED
- 6.3 PRINTED WIRING PATTERNS
- 6.4 WIRE COLOURS
- 5.5 WIRING LISTS PROVIDED
- 7.1 INTRODUCTION
- 7.2 COMPONENT VALUES
- 7.3 GRAPHIC SYMBOLS
- 7.4 LOGIC SYMBOLS
- 7.5 REFERENCE DESIGNATIONS
- 7.5.1 Types of Inputs/Outputs
- 7.5.2 Logic Level/Convention
- 7.7 IDENTIFICATION OF SCHEMATIC DIAGRAMS
VSHD Exciter Technical Instruction Manual Page 7-1
Section 7 Electrical Schematics and Assembly Detail Drawings Issue 2.0
VSHD Exciter
TECHNICAL INSTRUCTIONS
Section 7 ELECTRICAL SCHEMATICS AND ASSEMBLY DETAIL
DRAWINGS
7.1 INTRODUCTION
This section contains electrical schematics and assembly detail diagrams for the subject
equipment. Refer to Table 7-1 for an itemized listing.
7.2 COMPONENT VALUES
Unless otherwise specified on the logic/ schematic diagram:
• Resistor values are shown in ohms.
• (K = 1000 and M = 1 000 000).
• Resistor power ratings are not shown when less than 0.5 W.
• Capacitor values are shown in microfarads (µF).
• Unidentified diodes are part number 1N4938.
7.3 GRAPHIC SYMBOLS
The graphic symbols used on electrical schematics are in accordance with American National
Standard ANSI Y32.2-1975 - Graphic Symbols for Electrical and Electronic Diagrams.
7.4 LOGIC SYMBOLS
The logic symbols used on electrical schematics and logic diagrams are in accordance with
American National Standard ANSI Y32.14-1975 - Graphic Symbols for Logic Diagrams.
7.5 REFERENCE DESIGNATIONS
Reference designations were assigned in accordance with American National Standard ANSI
Y32.16-1975 - Reference Designations for Electrical and Electronic Parts and Equipment. Each
electrical symbol has been identified with its basic reference designation. To obtain the full
reference designation for a specific part, this basic identifier must be prefixed with the reference
designation assigned to all higher assemblies.
7.5.1 Types of Inputs/Outputs
On electrical schematics, names used to describe two-state (logic) inputs/outputs are prefixed
by a '#'. Those inputs/outputs representing a one-state or analog signal will have no prefix.
7.5.2 Logic Level/Convention
The '#' prefix identifies an input/output that has two distinct states - 'high' and 'low'. A suffix, '+'
or '-', identifies the active (true) state of the input/output. The 'high' (+) will be the more positive
of the two levels used to represent the logic states. The 'low' (-) will be the less positive of the
two levels used to represent the logic states. Two types of logic, positive and negative, may be
represented on a particular schematic. In positive logic, 'high' represents the active (true) state
and 'low' represents the inactive (false) state. In negative logic, 'low' represents the active state
and 'high' represents the inactive state.