PRESS BUTTON UNIT No's 1/SA4259 and 2/SA4259

These press button units were produced for PABX DC Code C signalling systems.  Both models use the PBU No. 3D as the keypad.

These would require a telephone to operate and the Telephone No. 713 would normally have been used.  The wiring diagram when used with Telephone No. 713 - SA4259.

Each telephone must be supplied with a signalling earth connection.

Correct line polarity must be observed.

Made by ETL.

Push Button Unit 1/SA4259
This model was fitted under a desk, but close to the front edge.  The keypad section would be pulled out and then locked in the open position by pressing the front downwards.  Lifting the front of the keypad allowed it to return by the assistance of a spring.

Drawing - 93146

Push Button Unit 2/SA4259
This model can be table mounted, in which case 4 rubber feet are fitted and the cord entry is at the rear, or wall mounted with direct cabling, if required through an entry hole in the base.  In the later case the keypad is reversed.

Dimensions - 91mm wide at the front edge x 81mm at the rear edge x 136mm deep x 33mm high at the front edge and 66mm at the rear edge.  The number label holder is at the front edge.

Drawing - 93147

Marketing Instruction B4B0111

Maintenance instruction E5B2850
 

Push Button Unit 1/SA4259	Push Button Unit 2/SA4259

 

Last revised: April 10, 2025