GM4000A™ Switch Machine - Alstom

General DescriptionThe wiring of the controller configures the switch machine wiring, operation voltage, andspeed. The controller can be set for 2-wire (Model 55E), 3-wire (Model 5E/5F and ModelM23/M3), 4-wire (Model 5G/5H), or 5-wire (Model M23/M23A/M23B) power through thewiring configuration. See Figures A–1 through A–8 for circuit drawings. See Section 3,Installation, for wiring configuration options.The controller is field replaceable, mounted to the switch machine case. All of itselectrical connections are made with color coded connectors. The controller electricalconnections are keyed to prevent damage to the controller.1.7.5. CoversThe GM4000A has two lightweight aluminum covers, as shown in Figure 1-3, thatprotect internal switch machine components from unwanted debris, water, or othermaterial. These covers are attached to the switch machine by a quick release hasp thatcan be locked. The removable covers can be utilized as a tray to hold hardware or toolsduring maintenance.To remove a cover, remove all locks being used on the hasp and release the strap bypulling up and away from the switch machine.1.7.6. Cross BraceThe cross brace is connected to the switch machine case and supports the covers. Thecross brace can be removed to give additional access to switch machine components.Figure 1-9 shows top view and cross section of a cross brace. The cross brace locationis shown in the assembly drawing, Figure 7-1 sheets 7 and 8.AAA-AFigure 1-9. Cross BraceP2496, Rev. 6, Jul/11 1-16 Alstom Signaling Inc.