Figure 7-35.-Power supply module.

Figure 7-36.-Circuit card housings, typical. 7-40

(fig. 7-37) is mounted on the right bulkhead of the control compartment. It houses launching system test equipment, a DIM, and an ESCU.

Launching system test equipment is on the upper two shelves of the train and elevation control. The test equipment is used for programming and signal tracing of train and elevation components. Operating cycles of the launching system may be timed and proximity switch actuators may be tested and charged. The elapsed running time of motors, control system, and strikedown equipment, along with the cumulative number of RSR index and raise hoist cycles, are monitored. The equipment is also used for programming and testing integrated circuit components.

The DIM is a solid-state electronic control module.

It provides train and elevation analog signals to the train and elevation control and to the ESCU. Inside the DIM are PC cards that accept either a remote, test, load, or jettison order signal. The signal depends on the pointing mode selected at the MCC. In remote mode, the PC cards accept serial order data from the DST or-on an alternate path-the same serial order data from the local control module (view Bin fig. 7-32).

The PC cards change the serial order data to two analog signals: a synchro position order and a velocity order. The synchro position order causes the train and elevation control to position the launcher. The velocity order allows the ESCU to compensate the train and elevation control.

The PC cards process test orders the same way as remote orders, except that the order signal generator (OSG) provides the serial order data. For load or jettison mode, a diode pinboard in the DIM generates fixed position signals. These signals allow the PC cards to generate the desired position.

The ESCU is the servo amplifier for train and elevation control. The PC cards inside the ESCU generate command signals that cause the train and elevation power drives to move the launcher to an ordered position. The PC cards give command signals by processing analog synchro pointing orders from the DIM and comparing these orders to the actual position of the launcher. The actual launcher position is provided to the ESCU by feedback signals from train and elevation controls.

Auxiliary Equipments

Located on top of the ICS compartment are other components not directly associated with the control system, but they do bear mentioning.

Figure 7-37.-Train and elevation control test center.

The personnel access trunk (fig. 7-38) serves as a passageway connecting the ship security station to the ICS. It also mounts various weapons system-related electrical and electronic equipments. Interconnecting cabling from WC and ship's power enter the trunk and are routed to a receptacle assembly. The cables are then attached to quick-disconnect plugs and routed to the ICS.

A filter box assembly has components that filter 115-volt ac, 400-Hertz synchro power and the 28-volt dc power for firing circuits. A channel selector (not part of the launching system) contains components used to match the frequency of the AAW missile on the launcher rail to the radar channel frequency of the fire control system.

An ASW-missile setting panel (also not part of the launching system) contains electrical and electronic equipment used for programming ASW missiles. The thermal battery compartment (shown in fig. 7-18) stores 15 ASROC missile (depth charge) thermal batteries. A battery is installed manually in the weapon before it is loaded onto a guide arm. The compartment has two doors and a combination lock.