940-0128D is functionally similar to the 940-0128A cable except for NC on (6) DTR and (2) RD on the computer side.
RI(9)<---+ | CTS(8)<---+--- E 2N2222(NPN) |___ ____ /| B | | C | | | +---vvvv---+--[>|------<(2)OnBatt RTS(7)>---| 2k 1N5819 +---vvvv---+--[>|------<(3)LowBatt | | +--- C | |___| /| B DCD(1)<------- E 2N2222(NPN) DTR(4)>-------------------------->(8)KillPwr GND(5)----------------------------(7)Signal GND (Shield)--------------------------(4)Chassis GND