a50@mindlink.UUCP (Cliff Lum) (07/21/90)
I am trying to interface a piece of lab equipment to an IBM serail port. The DB25 connector is a current loop and the RS232C is an 8 pin I repeat an 8 pin DIN connector. Does any by chance besides guessing the proper pinouts for it. The instrument is a SWiss made titrator. Chemical apparatus. Thanks
walvdrk_r@pttrnl.nl (Kees van der Wal) (07/27/90)
> I am trying to interface a piece of lab equipment to an IBM serail port. The > DB25 connector is a current loop and the RS232C is an 8 pin I repeat an 8 pin > DIN connector. Does any by chance besides guessing the proper pinouts for it. It might be a S5/8 interface. See e.g. "electronics & wireless world" July 1986 and August 1986. The pin numbering is: 1 Data input 2 Ground 3 Data output 4 Handshake input 5 Handshake output 6 Subsidiary input (not standardized yet) 7 Subsidiary output (not standardized yet) 8 5Volt (out for a D-device, in for an S-device) A D-device is a self-powered device, able to supply power to the S5/8 interface. An S-device may draw up to 20mA. A D-device has a (female) connector, an S-device has a lead attached to the device with a male connector. All signals are 0 to 5Volt. All inputs however can cope with up to 25Volt, such that the +12V and -12V of an RS232 output. To drive an RS232 input from an S5/8 output the 5Volt may be too little for reliable operation. Data format: 1 start bit, 8 databits, 1 stopbit at 9600 bit/s. Kees van der Wal e-mail: JC_vdWal@pttrnl.nl ---------------------------------------------------------------------------- PTT Research Neher Laboratories P.O. Box 421 2260 AK Leidschendam The Netherlands Phone: +31 70 3326295 ============================================================================