Power and Computing Solutions for Harsh Environments
8-Port RS-232/RS-422/RS-485 PC/104 Module
Emerald-MM-8
Advantages
- 8 digital I/O lines and 8 serial ports
- Jumper selectable RS-232, RS-422, RS-485 on all ports
- Fixed RS-232 or selectable RS-422/485 versions also available
- Programmable address and interrupt settings
- Interrupt sharing - any no. of ports or boards
- Interrupt status register for Windows NT
- Dual 40-pin I/O headers (4 ports per header)
- 16-bit PC/104 bus for additional interrupt levels
- +5V only power supply
Emerald-MM-8P is a PC/104 I/O module with 8 serial ports with protocols that are software programmable.
I/O addresses and interrupt levels are programmable for each port, allowing maximum configuration flexibility. For applications where fixed addresses are desirable, four groups of preset addresses are provided that can be selected by jumper settings.
Two I/O headers are provided, with four serial ports on each header. The board operates on +5V only, eliminating the need for a +12V supply that is often required for serial port operation.
Emerald-MM-8P is based on the 16C554 quad serial port IC. This device contains 4 identical sets of registers, one for each port, and is compatible with the standard PC serial port. Each port contains a 16-byte FIFO. Complete descriptions of these registers may be found in the Appendix. Most users will not need this programming information, as it is normally handled by the operating system's communications software.
| File | Description | |
| emeraldmm8_spec.pdf | Emerald-MM-8 Spec Sheet | |
| emeraldmm8_man.pdf | Emerald-MM-8 Manual |
| Part Number | Description | Status |
| EMM-8M-XT | Emerald-MM 8-channel RS-232/422/485 extended temp. |
| Accessories and Options | ||
| C-DB9M-4 | Quad DB9 male to 40-pin header 18" cable, serial ports 1-4 | |
