EPIS 5.0 - involved in VLD

The EPIS 5.0A on-board computer with check-in is designed for public passenger transport, especially in regular transport (including public transport). It combines passenger check-in including on-line communication with backoffic or DZC, dispatcher control and communication capability, information system management, public or on-board WiFi and other options. A principle diagram of the general in-vehicle wiring in particular VLD is shown in the following figure. The general wiring diagram for the JMK ITS is here. It shows that it allows to integrate many systems together due to its power.



  • The on-board computer with EPIS 5.0A1 check-in unit in the EPC 5.0A1 control unit, the EPP 5.0A LQB check-in unit, the EPT 5.10A driver's touchscreen LCD terminal and the EPI 5 external switch.The external EPI switch switches the standard +24V voltage to the HS power output (main switch) and, on request, to the PS power output (auxiliary switch).
  • Common GNSS (Global Navigation Satellite Systems) and GSM/LTE antenna. This combined antenna is placed on the roof of the vehicle (bus) for better satellite reception for vehicle positioning and also for better communication via GSM/LTE. For this purpose, the combined antennas are supplied with a high quality cable for GSM/LTE reception (very low attenuation).
  • Since the EPIS 5.0A on-board computer is permanently energized directly from the vehicle batteries (even though it is in stand-by mode), this OIS (check-in and information system) wiring must be fused with a separate fuse. The maximum power consumption is determined by the power consumption of the EPIS 5.0A on-board computer and other components connected to the HS power output (boards, markers, LCD, command receiver, ...).
  • The docking connector to the on-board computer base allows easy replacement of the unit. It is routed from the standard EPIS 5.0A - KEP 5A-01/xx connection cable, where xx is the cable length in decimeters. If the vehicle contains an acoustic system for playing a radio or other sound source, additional outputs and a switching relay must be used - cable KEP 5A-02/xx (diagram to be added).
  • The external vehicle loudspeaker is located above or below the first door of the vehicle - it is activated either by a command receiver for the destination stop announcement or by the on-board computer if there is "any" exception on the route as a warning to passengers (e.g. a route closure,....).
  • Internal acoustic wiring for standard announcements to passengers from a digital annunciator, driver or dispatcher.
  • IBIS bus hub - a junction box in the vehicle to be used as a distributor for the IBIS bus and HS power supply. Depending on the number of components connected to this bus, 1-3 hubs should be used in the vehicle.
  • Vehicle faceplate usually showing the destination station and line number with dimensions according to the operator - e.g.VLP 19×144 GI.
  • Vehicle side board displaying the line number, destination station and intermediate stops or other additional information - e.g. VLP 19×112 GI.
  • Rear vehicle board (number) showing the line number - e.g. VLP 19×32 GI.
  • Internal LED board for passenger information - e.g. VLP 10×120RI.
  • Time and zone board - this can also be an internal LED board or LCD for passengers, e.g. VLP 12×64
  • Command receiver for signaling from the blind - EPNEV 3.x4
  • Ticket marker usually located at the first door and now standard on the IBIS bus - e.g. ETM 4.0
  • Single-bit inputs to the on-board computer providing basic system functions:
    • START - switches the on-board computer from a "stand by" state to an active state by applying +24V from the vehicle key. The system is deactivated by turning off the key and then after the driver logs off.
    • Emergency button - sends an "alarm" message to the dispatcher regarding the vehicle's and especially the driver's emergency (the button can be hidden in the driver's cab).
    • First door and next door - feeds the door status to the PP for subsequent evaluation of vehicle behavior statistics. In case the inputs are not connected to the door lights but to the signals from the "MUX" units, it is usually necessary to connect auxiliary resistors between the input and the vehicle ground to reduce the voltage. The resistors used are from 560 Ohm and above depending on the vehicle wiring.
  • Ethernet communication unit ECU 08L.1FA3L
  • Internal LCD for passengers - e.g. VCS 185 or other types,
  • Frontal accident camera
  • Course indicator VLP 8×35
  • Passenger counting units UCP 02
  • Communication unit with GPS and V2X for public transport preference - UCU 5.0VG (uses LTE communication via on-board computer) - provides preference for public transport vehicles at intersections and also allows to display warnings about the passage of IZS vehicles in the vicinity.

It allows for buses that are operated as regular buses and also as tour buses to connect the existing acoustic system of the vehicle from the amplifier or radio, video, etc. using relays. The on-board computer then activates the output of the unit and switches on the external auxiliary relay in the event of a stop announcement to the vehicle. This disconnects the internal bus amplifiers and connects the amplifiers from the on-board computer and makes the announcement. When it is completed, the relay then drops and the speaker line to the vehicle is again through to the bus amplifier. The diagram shows an EPNEV 3.x4I blind signaling receiver approved for use in the JMK ITS (generally it can be used elsewhere where only receiving and transmitting signals over the IBIS bus is done).

Example of ECU 08L.1Fa3L switch wiring in an IDS JMK vehicle using a front safety camera and heading indicators. As a special feature, the connection of the EPNEV 3.18 or EPNEV 3.28 (selective version) command receiver is demonstrated. The other 4 already quite standard Ethernet ports are intended for connection of the EPIS 5.0A control unit, passenger LCD panel, e.g. wide-screen VCS 290 or standard VCS 185. And there are still two more ports available for future expansion - e.g. ETM 4.0.

Example of a simplified bus wiring for IDS with front camera and heading indicators.