Features:

A BA-4 backplane is for use with the PC-1 (power & processor module) in the far left slot and any I/O or communication modules in the other 3 slots.

A BA-40 backplane is similar to the BA-4 backplane except the J5 (PC-1 lower connector) and SL-9 (PC-1 power) connectors have been removed to allow various modules to be installed in the leftmost slot.

A BA-40 can be used with a PS-xx power supply and a CP-xx processor module or can be linked to any other backplane when more slots are required.

There are four (4) connectors at the far right of a BA-4 backplane. The two (2) small 8 way connectors are for inter-backplane communication links, the six way connector is for an external power supply (+5V and +12V DC), and the lower 9 way connector is used for incoming and outgoing power. A BA-40 does not have the lower 9-way SL-9 connector.

Product specifications:

BA-4 External Connections

J14 Power Connector (viewed from the top)

24V 12V 5V PCON 0V 0V PCON = Processor controlled power enable. The 24V pin is not used by the PC-1. The 12V and 5V output pins can be used to power a second backplane (e.g. BA-40). These pins are supplied by the PC-1 when a battery or input supply is connected to the orange BL9 connector.

J13 (in), J15 (out) Inter-rack Backplane Comms Connectors

The +12V Radio terminals can be used to power a radio or other external equipment.