TM-9-1200-215-34&P Technical Manual for M109 Automatic Fire Control System (AFCS) Download
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TM 9–1200–215–34&P Glossary 1 GLOSSARY Backplane Provides connectors for mating with the CCAs and distributes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . signals and power among the CCAs and connections going to the EMI/EMP filter component. Cable Assembly Connects the Circuit Card Assembly receptacles to the J1 and . . . . . . . . . . . . . . . . . . . . . . . . . . . J2 receptacles Central Processing Unit Circuit Card Assembly (CCA) Performs all computations of projectile ballistics. . . . . . . . . . . . . . . . . . . . . . . . . Connector Descriptions Connectors J1, J5, and J8 are the 28 Vdc power input ports to . . . . . . . . . . . . . . . . . . . . the ACU. Display Panel An electro–optical assembly consisting of a 4 x 8 inch thin–film . . . . . . . . . . . . . . . . . . . . . . . . . . . . . electroluminescent panel, control circuitry and a power supply. DRU Controller Provides control of the interface with the navigation processor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . Electrical Connector A standard 41 pin cylindrical connector marked J1. . . . . . . . . . . . . . . . . . . . . . . . EMI Filter Prevents external power and noise from entering the system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Expanded Memory Board Stores program instructions and data. . . . . . . . . . . . . . . . . . . Loopback Function Allows the looping of transmitted signals to the receiver. . . . . . . . . . . . . . . . . . . . . . . . . LRU Interface Provides the operational interface with the VMS Modem CCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . and its cable Memory Board Stores various relevant data, including operating instructions, . . . . . . . . . . . . . . . . . . . . . . . . . . . . test instructions, variable values, system constants, calculations results and target data. Nuclear Event Detector Conducts current when exposed to gamma radiation. . . . . . . . . . . . . . . . . . . . . Power Supply Module Converts conditioned vehicle power to local system voltage . . . . . . . . . . . . . . . . . . . . . . levels. Power–up Relays Provides emergency output power. . . . . . . . . . . . . . . . . . . . . . . . . . Servo Controller Interface CCA Supplies operating current to azimuth and elevation . . . . . . . . . . . . . . electrohydraulic servo valves. Provides a link between the CPU module and the servo controller module. Solenoid Relay Provides power to the Hydraulic Solenoid Valve and the Bypass . . . . . . . . . . . . . . . . . . . . . . . . . . . . Valve. Status Monitor Circuit Monitors the vehicle battery and back–up battery voltages and . . . . . . . . . . . . . . . . . . . . . . generates the vehicle battery status and back–up battery status. Switch Panel An electro–mechanical assembly which contains 23 push button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . switches, three toggle switches and two indicator lights. TCIM CCA Allows direct connection between the ACU single–board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . computer CCA and the SINCGARS. Test Interface The J2 connector provides the VMS Modem CCA test interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Trainer Controller Provides control of the interface with an external training device. . . . . . . . . . . . . . . . . . . . . . . . . . . Transient Voltage Suppressors Cuts off voltage spikes to less than 100 volts. . . . . . . . . . . . . . . Glossary–1/(Glossary–2 blank)