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The hardware
Cable
The 1902 needs both power and RS232 cables to be connected;
it will not function usefully without RS232 control, although,
connections
once the 1902 has been set up and is working properly, the
RS232 cable can be removed. The two cables are applied to
connectors on the rear panel.
Power
The connector from the power supply is a Molex-style cable
socket at 0.156" pitch with a retaining ramp. There are six pin
positions, one of which is blanked to provide a polarizing key.
This socket engages with the connector marked
.
Power In
If the CED power supply is being used, this must be connected
to normal AC mains by the standard IEC cable provided. There
will be a mains plug suitable for your country. This power
supply can run on any mains voltage from 100 V to 240 V AC,
1902 power cable socket
50 Hz - 60 Hz. There are no switches on the 1902 or the power
supply; power is entirely controlled by switching at the mains
socket.
RS232
The RS232 cable for the 1902 has two 9-way D-type connector
sockets and is reversible end for end. Offer one end to the D-
type plug marked
and the other to your computer's
RS 232
RS232 port. You will have to inform your application software
which port you intend to use (see 1902 communication
configuration, page 14.) Make sure that the jackscrews on both
connectors are screwed home to reduce the possibility of
radio/television interference.
Signal cables
We expect users to furnish their own input cables for the trigger
and transducer connectors, for which we supply suitable mating
plugs, and also their own BNC output cables. Details of the
front-panel socket pin-outs are described in the Electrical
Specification section below. The two outputs from the 1902,
trigger and amplifier, are brought out through BNC connectors,
which can be connected using standard BNC cables to
measuring and recording equipment, such as the CED 1401.
16
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