The first volume gives detailed technical information about the equipment of railway automation and telemechanics, which is widely used at the present time, as well as the production of which has recently been mastered: electric drives, electric motors, control and monitoring devices, relays, blocks, cabinets, equipment of the marshalling system for installing electrical interlocking devices, relay cabinets. The second edition is supplemented with the description of the arrow MSP-0.15 electric motor, relay of tension of RNP, the relay (cells) TSh-5, TR-ZV, TR-2000V, TR-5, the REM and REMS electromagnetic relays, AB-21-78-DSP, AB-21-78-PK, AB-21-78-LB and AB-21-78-LBD blocks phasing FU-1 devices, the indicator of food of SP and cases of SRU, etc. Changes have been made to the technical characteristics of a number of devices.