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BA-3 Exte rn a l Co n n e c tio n s
J14 Power Connector Pinout (viewed from the top)
24 V 12 V*
5 V
PCON
0 V 0 V
PCON = Processor controlled power enable.
The 24 V pin is not used by the PC-1. The 12 V and 5 V output pins can be used to power a second
BA-4 backplane. These pins are supplied by the PC-1 when the 12 V battery or 12 V input supply is
connected to the orange BL9 connector.
*CAUTION: The 24 V and 12 V pins are shorted on early revision backplanes (prior to revision 1.3).
Early revision backplanes were designed for 24 V only.
J13 (in), J15 (out) Inter-rack Backplane Comms Connectors
1
2
3
4
8
7
6
5
Pin 1: IO+ Serieal I/O link
Pin 2: CM+ Serial CM link
Pin 3: 0 V Signal ground
Pin 4: IO- Serial I/O link
Pin 5: CM- Serial CM link
Pin 6: 0 V Signal ground
Pin 7: CSR
Pin 8: PCON Processor controlled power enable
J17, J18
Serial Ports (P1, P2)
Pin 1
CD Carrier data detect
Pin 2
RXD Receive Data
Pin 3
TXD Transmit Data
Pin 4
N/C or I/O (RS485) Port 2 only
Pin 5
0 V (RS232 and RS485)
Pin 6
N/C or +IO (RS485) Port 2 only
Pin 7
RTS Request to send
Pin 8
CTS Clear to send
Pin 9
NC
Pin 10
NC