#Epson serial cable pinout db9 to db9 serial#

In this instance, I would either purchase or build a null-modem cable DB9F to DB9F - actually, I would copy the last example, basically the cable used to connect two PCs together with handshaking. If you have some other way to actually prove this - for instance by trying each of the devices on another system - do it. The first thing to remember, is that there is a good chance the two devices you are trying together will actually work if you can get the cable correct. Our D9 Breakout box is a little more sophisticated - it also allows you to disconnect certain lines in the cable, and to loop signals to their opposite number - good for trying new cable wiring possibilities. The units have an LED for each signal line in the cable, and the LED lights green or red dependent on the signal state. If you have problem with RS cabling, your best 'emergency' tool may be a breakout box sometimes called an LED box. Connecting two PCs together using RS, with handshaking. The particular requirements for different equipment may vary. Connecting two PCs together using RS, without handshaking. The diagram below indicates how you would go about connecting two PC's together, without handshaking.

#Epson serial cable pinout db9 to db9 serial#

Handshake looping a PC serial connector.Д¬onnecting together two serial devices involves connecting the Rx of one device to the Tx of the other, and vice versa. We specifically chose to use the Personal Computer PC as the frame of reference for the signals on this page.

The reliable solution is to loop back the handshake lines if they are not used. Depending on the signal state it might sometimes work, other times it might not.

While the normal PC hardware might well run with just Tx, Rx and Ground connected, most driver software will wait forever for one of the handshaking lines to go to the correct level. Do you need - Networked Serial Electronics? Metering, Controllers, Callpoints, Fire panels, access control, lighting, robotics -We design and build- Call us now! RS-232 serial cable pinout