McCain ATC eX NEMA, Руководство пользователя

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12
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A five positions header (DC INPUT) for receiving the DC voltages from the power supply sub-
assembly (M45891).
*** The power input for this sub-assembly depends on the configuration chosen; it can receive the AC line
input either through the “A” connector resident on the optional connector box or from the front panel’s A2
connector (M44301).
2.6.3 Host Board Sub-Assembly (M69945A).
This sub-assembly supports almost all of the circuitry and physical connections of the communication
interfaces, as the name indicates, it is the host which supports the engine board, so that it contains all the
necessary circuitry to receive all communication channels, control lines from the engine and all the
necessary I/O interfaces to the external world. Below are briefly described the circuits and interfaces
included onto the host board:
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Two 50pos receptacle connectors to allow the Engine board to be plugged (P1 and P2).
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The +5VDC backup circuit.
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Voltage and Fault monitor driver circuit with a 3 positions header (P10) to plug front panel’s A2
connector harness plug.
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An ACTIVE LED driver circuit.
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A 12 position connector (P8) to receive DC voltages and control signals.
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A 10 position box connector (P9) to handle the SPI communication with the optional connector
box.
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A Header for a 10/100 Ethernet signal detection (J1).
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A 40 positions header (P3) for routing SP-1, SP-2, Ethernet, POWERUP and CPURESET signals
to the Modem board (M66279A).
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One D-sub 15 positions connector (CN2) for SDLC communications.
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Three D-sub 9 positions connectors (CN3, CN4, and CN5) for general purpose communications.
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Two Ethernet switches and four Ethernet jack connectors (RJ1A, RJ2A, RJ3A, RJ4A); one switch
handles three ports (RJ1A, RJ2A, RJ3A) on the front panel (Port 1) and another port routed to the
Modem board (M66279A) thru a ribbon cable (Port 4). The second switch handles one port
(RJ4A) on the front panel (Port 2) and three more ports located on a 40 position header box (P4).
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A USB switch and four USB connectors (USB1, USB2, USB3, USB4).
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An SPI EEPROM (U4) with factory set configuration parameters.
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A twenty positions header (P6) for attaching the LCD display.
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A three position header (P11) to plug the harness for LCD’s contrast control.