OCIO +5VDC A +5V DC supply resides on the SC900. This supply is
connected to J51-4, as well as J52-25 (OCIO port), and J4-25
(command port on base unit). The total current draw from all
connections must not exceed 200 milliamperes.
RS-232
Connections
RS-232 connections on J51 are shown below. Cable wiring
required for connecting to either 9 or 25 pin serial ports of most
computers are also shown.
Note: Pinouts vary among computer manufacturers. Check the
hardware reference manual for your machine before wiring.
Cabling diagram A 6 foot (1.8 m) RS-232 Cable with 9 pin connectors anda9pin
to 25 pin adapter is available from Pacific Scientific. The Pacific
Scientific order number is RS-232-750.
Note: Shielded wiring is recommended for the serial
communications cable to minimize potential errors from electrical
noise.
MA950 3-11
I/O RTN
RS-232 RXD
RS-232 TXD
9 CONTACT FEMALE D SUBMINIATURE CONNECTOR
TYPICAL CABLES
9PINFEMALE
25 PIN FEMALE
9PINMALE
9PINMALE
TO PC
(9 PIN)
TO PC
(25 PIN)
TO 0C950
TO 0C950
2
3
5
2
3
5
2
3
5
3
2
7
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