SLB, BSLB and Block Equipment

 SLB ( shunting limit board)

It is used in single line B class Station working in Absolute block system, where Advanced Starter is not provided and Shunting is permitted in front of Approaching train.Its distance is 180 m ahead of Home Signal and it is facing towards station.A white light on the board will lit both in day and night

Shunting in face of approaching train can be done only upto SLB.

                 Dimension of rectangular board is 600 mm×1000 mm.Height of the bottom of rectangular board is 2 m from rail level.On the post there are alternate band of Black and White, each 300 mm wide.

BSLB ( Block Station Shunting Limit Board) 

It is used in double line B class station worked on absolute block system and placed 180m  ahead of home Signal when first point is trailing or there is no point.

BSLB should be placed near Fouling Mark of the first point.Legend is facing towards station. A white light on the board will lit both in day and night.

Other Indication Boards

An indication board shall be provided at foot of gate signal if it is protecting more than one mid section LC gate with appropriate legend.

An indication board shall be provided at the foot of the IB Signal if it is protecting mid section LC  gate with legend ' look out for LC gate when passing IB signal at ON.

Important points 

One Block equipment can be Overhauled maximum two times in a S&T workshop.

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