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MBX MIL-STD-1553 Switch
Overview
The MBX MIL-STD-1553 Bus Switch complements our 1553 Solutions, and other vendors' MIL-STD-1553 products, by providing a virtual patch panel in a 19" rack-mountable chassis. This 16x16 crosspoint switch provides differential connections from 16 transformer-coupled Line Replaceable Unit (LRU) inputs to 16 MIL-STD-1553 differential buses. The LRUs can be any transformer-coupled MIL-STD-1553 device: bus controller, remote terminal, or bus monitor. Although the switch supports 16 non-redundant LRUs, it can also be used with dual (or more) redundant devices. The MBX virtually eliminates time-consuming bus rewiring between avionics simulations or test scenarios.
The MBX switch provides 16 LRU inputs via standard concentric twinax connectors on the front of the unit. The bus output connections, which utilize the same type of connectors, are located on the rear of the unit. Multiple switches may also be connected together for more LRU inputs or bus connections. Switch configuration is controlled via an internal processor and associated RS-232 serial port. The operator control and status information is sent via the serial port to a control terminal or computer. LRU inputs may be selectively connected (or disconnected) from a specified bus. The internal controller ensures that each LRU is not simultaneously connected to more than one bus. The serial port provides switch status when commanded, allowing a user to view the current switch configuration. The switch also includes a front-panel display that indicates current switch state, which is useful if the operator control device is not located close to the unit.
Hardware Features
- Up to 16 transformer-coupled LRU inputs via standard concentric twinax connectors. This product is NOT designed to support direct-coupled LRU devices.
- Up to 16 MIL-STD-1553 bus output connections via standard concentric twinax connector.
- Provides logic that ensures that any single LRU port can be connected to only one of the buses at a time.
- LRU and bus coupling relays physically disconnect the LRU and/or bus from the crosspoint switch if they are not currently logically connected.
- The switch configuration is stored in non-volatile memory. After each power-up event, the crosspoint switch is configured in the last working state.
- Support MIL-STD-1553A, MIL-STD-1553B, and mixed-device environments.
- The LRU units can be any transformer-coupled MIL-STD-1553 device: bus controller, remote terminal, or monitor.
- Out-of-band control/status uses an RS-232 port.
- Front-panel LCD indicates switch status.
- Can be connected to a modem and controlled from a remote location.
Command Line Interface
The MBX provides an out-of-band command line interface, which allows configuration of the switch and receipt of status information from the switch. This command line interface has the following features:
- On-line help
- Command set supports the connection of a specified LRU to a specified bus.
- Command set supports the disconnection of a specified LRU.
- Command set supports the display of the crosspoint switch status.
- Provides a "prompt" to indicate the BusXchange is ready to receive and process commands.
- At power-up, the last configuration used is automatically restored.
- Requires no user intervention on startup.
Hardware Specifications
| Physical Dimensions |
Width: 17.000 inches
Depth: 10.275 inches (including 1553 connectors)
Height: 1.725 inches |
| Weight |
6.38 lbs (includes enclosure) |
| Electrical Requirements |
+5 VDC (± 5%), 3.5 A |
| Storage Temperature Range |
-40° to +85°C |
| Operating Temperature Range |
-25° to +70°C |
| Humidity Range |
10% to 90% (non-condensing) |
| Communication |
MIL-STD-1553A or B protocol |
| Interface to Bus |
Transformer coupling |
| Out of Band Control/Status |
RS-232 port |
| Mean Time Between Failure (MTBF) ** |
With Relays: 65,003 hours
W/O Relays: 67,361 hours |
| ** The MTBF numbers are based on calculations using MIL-HDBK-217F, Appendix A, for a ground-benign environment. |
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