Signal Operation Module (SOM6)

SIGNAL OPERATION MODULE (SOM6)

Make: SIEMENS

 The SOM6 board is a directly fed or transformer-fed signal operating module that activates 

steady-light and flashing aspects of signal light units.

The signal light units is a generic term which could refer to signal lamps, halogen lamps 

and LED signal light units

The signal operating module can be used both in buildings and in outdoor cabinets.

SOM6 CARD

SOM6 Card can control a maximum of 8 lamps (signal light units).

Lamp-1  : 

can be used as a most-restrictive aspect lamp permanently

Lamp-2  : can be used as a most-restrictive aspect lamp configurably 

Most-restrictive means: switched on automatically after failure of the control circuit

The eight signal light units connected to a SOM are independent of each other and can be assigned to any lamp circuits in one or more signals. But A FEW WORDS OF CAUTION:

• seen from the interlocking, the signals may only be positioned in one direction.
• only two lamps of a SOM are to be operated as most-restrictive aspect lamps
• if SOM controls 2 signals, then continuous or short-term interference between them may not be exceeded. So its recommended to group only signals of same station gridiron at one SOM. The same applies to line interlockings.

Safety ensured by SOM:

• Lamps are controlled by fail-safe computer on at least two channels.
• In addition to tests for checking the fail-safety of the board, there are tests designed to monitor the reference value of the lamp current and the insulation of the lamp circuits (intercore short-circuits).

DAY/NIGHT OPERATION: 

At night or in underground sections, lesser light intensity is required than in daylight conditions.

Switchover between the day and night voltage is not done on the SOM but centrally in the power supply unit.

The monitoring windows are adapted by a computer command to day or night operation.

The customer-specific current windows are freely adjustable on the adapter-connector within given limits.