When connecting an EIA-422 device to a computer port on the M24SII-V07 I/O module using 4-wire Operation and unidirectional Printer Sharing Mode, the cable required to connect the two devices must have RX+ wired to TX+, and RX- wired to TX-, HSO+ wired to HSI+, and HSO- wired to HSI-. Please see Figure 11 below.
M24SII-V07 Computer Port | Equipment |
(EIA-422, 4-wire, unidirectional) | Connections |
RJ-11 | RJ-11 |
1 | HSO+ | HSI+ | |
2 | HSO- | HSI- | |
3 | RX- | TX- | |
4 | RX+ | TX+ | |
Figure 11: M24SII-V07 EIA-422 (4-wire) Connection
If you are connecting a device other than another BayTech product, you must refer to the operator's manual for your equipment to determine which pins are defined as TX+, TX-, HSI+, and HSI-.
NOTE: If your EIA-422 device has only one input hardware handshake line (i.e., no HSI+ and HSI-), connect this single handshake line to HSO- on the M24SII-V07 module (Pin 5).
If you are connecting a computer port on the M24SII-V07 module to another BayTech product (such as the Tran-x LPT-460 or PS-02) using 4-wire Operation and unidirectional Printer Sharing Mode, please refer to Appendix A.7.4 for the recommended cable pinout.
