User manual

Computer Gateway User Manual B-10 5/96
B.2.9
B.2.9 RS-232C Direct Connect Cable (Type II)
• 15 meters, male-to-male connection
• Direct connect
• Each end supplies its own transmit clock and a receive clock.
• RS-232C standard connector-pin assignment
Function Clock Source Side Nonclock Source Side
Shield ground (AA) 1  1
Transmitted data (BA) 2 3
Received data (BB) 3 2
Request to send (CA) 4 8
Clear to send (CB) 5 4
Received line signal detector (CF) 8 5
Signal ground/common return (AB) 7 7
Line present (not RS-232C spec) 9 9
Logic ground 10 10
not used 11 11
not used 12 12
not used 13 13
Clock source 14 14
Transmit clock (DB) 15 15
Receive clock (DD) 17 23
Clock source 23 17
not used 16 16
not used 18 18
not used 19 19
Data set ready (CC) 6 20
Data terminal ready (CD) 20 6
not used 21 21
not used 22 22
not used 24 24
not used 25 25
Figure B-9 — RS-232C Direct Connect Cable (Type II) 3227