Since the MICAS vehicle bus transfers the data by using two different media, one with the local bus and other with the remote bus, this bus coupler serves as an electrical isolator and level converter between the local bus and remote bus. They regenerate the signals received by the local bus or the remote bus and transmit them on the remote bus or the local bus. A data conversion does not take place. If there is a continuous signal transmitter, the corresponding transmission direction will be switched off. This has single channel Optic fibre Transmitter and receiver.

Since the MICAS vehicle bus transfers the data by using two different media, one with the local bus and other with the remote bus, this bus coupler serves as an electrical isolator and level converter between the local bus and remote bus. They regenerate the signals received by the local bus or the remote bus and transmit them on the remote bus or the local bus. A data conversion does not take place. If there is a continuous signal transmitter the corresponding transmission direction will be switched off. This has 5 channels of Optic fibre transmitter and Receiver.

The new traction control electronics family realizes a new protection concept for electronics against electromagnetic interface. As a result, all the process signals are taken to the front panel of the individual electronic devices via screened cables and connectors. The signal routing board allows to connect up to 18 signals originating from the slightly emc populated peripheral range e.g. sensor signals via 6 sub-d connectors. These signals can be passed on to the rear edge connector. This card protects internal range against small disturbing pulses originating from the peripheral range by using simple RC filters.

The signal conditioning board is used to transfer signals between internal and external zones. Signals from peripheral zone are fed to the front panel via shielded cables by means of 9-pin sub-D connectors. They are processed and relayed to the rack connectors. The six measuring channels for the LEM-Transducers essentially consists of an input amplifier, which can function as current or voltage amplifier, a low pass filter and a comparator. Two channels are equipped with both rectifier and integrator. The six measuring channels can also be used to monitor the gate unit supply. Furthermore the board allows the testing of both LEM-transducer by means of its test winding and the measuring channels.

The signal conditioning board is used to transfer signals between internal and external zones. Signals from peripheral zone are fed to the front panel via shielded cables by means of 9-pin sub-D connectors. They are processed and relayed to the rack connectors. The six measuring channels for the LEM-Transducers essentially consists of an input amplifier, which can function as current or voltage amplifier, a low pass filter and a comparator. Two channels are equipped with both rectifier and integrator. The six measuring channels can also be used to monitor the gate unit supply. Furthermore the board allows the testing of both LEM-transducer by means of its test winding and the measuring channels.

The signal conditioning board is used to transfer signals between internal and external zones. Signals from peripheral zone are fed to the front panel via shielded cables by means of 9-pin sub-D connectors. They are processed and relayed to the rack connectors. The six measuring channels for the LEM-Transducers essentially consists of an input amplifier, which can function as current or voltage amplifier, a low pass filter and a comparator. Two channels are equipped with both rectifier and integrator. The six measuring channels can also be used to monitor the gate unit supply. Furthermore the board allows the testing of both LEM-transducer by means of its test winding and the measuring channels.

The Fibre optical Transmitter/Receiver board is a part of the control electronics for the drive control unit. The Fibre optical Transmitter/Receiver in (LWL) AF B635 B08(GTO) converts the electrical firing pulses received from AS and NS controllers into corresponding light pulses for potential free and interference free transfer to the gate units. The feedback signal also transferred optically is converted into electrical impulses. There are 8 channels each for transmitter and receiver. For transmitter, signal level for optical logic“0” is <40 dBm and optical logic “1” is>-20dBm. Similarly signal level for receiver optical logic“0” is <-40 dBm and optical logic “1” is between -24 dBm to -12dBm

The purpose of Digital Input/output relays UR B512 boards is that digital data can be exchanged between AMS BUS and process(EMC disturbed zone). The signals from EMC disturbed zone are interfaced via sub-D front connectors to Digital Input/output board. The EMC disturbed zone is electrically isolated from EMC protected zone and EMC computer zone by means of opto-couplers.
The Digital I/O board provides 16 inputs in two groups of eight. They are electrically isolated from each other by optical means. Due to electrical isolation of the groups, the battery power supply must be connected separately to each input group.

This is a multiple Power Supply with 160W DC-DC- Converter with potential isolation. It generates the Output Voltages 5V/4A, ±15V/1.5A and ±24V/2A with an input range from 66 to 154 VDC. It operates from -55 to 100°C. Its efficiency is upto 90%.

The Analog I/O board is mainly intended to Input and Output the analog data. It filters and amplifies the analog values and makes them available on the AMS bus. The inputs can be configured (current, voltage etc.) by the user. The differential input channels are equipped with two RC low passes. The outputs of the differential amplifier (after the low pass) are lead to ST1 connector and to the test sockets.

This card converts the Wiegand sensor signals from 4 speed measurement devices to CMOS-logic level, simulates d.c. link current and current flowing through the MUB-resistors. Also it induces protective shutdown in case of any major failure and thus provides converter protection.
The modified AS-peri card is able to take inputs from the latest IGBT type sensors. Also it gives provision for automatic switching of a healthy channel into another circuit, in case the speed sensor of that channel is defective (auto switching feature). This modified AS-pericard, when provided in MICAS based locomotives having GTO converter, will be able to support both new generation of speed sensors which are used in IGBT converters as well as the active sensors presently used in the GTO converters. This will bring in standardization and backward compatibility.

NS-peri card is a part of line converter control electronics in drive control unit. It performs all line current functions which cannot be controlled by main controller board. The calculation of magnetizing current of the transformer, multiplexing of GTO feedback signals are performed.

Binary I/O board is designed to support the special functions required by the Drive Inverter Control Unit in the locomotive. It contains 16 digital inputs and ten digital outputs with relays and two FET outputs. The FET output has a feature which is necessary for the protective shut-down which will be required during serious failure within ALG rack.

This is a multiple output card with DC-DC converter having potential isolation. Output voltages of +5V/7A, ±15V/2A and ±24V/6A are produced from input voltage of 77V to 137V.

This is a multiple output card with DC-DC converter having potential isolation. Output voltages of +5V/4A, ±15V/1.2A and ±24V/3A are produced from input voltage of 77V to 137V.