Things Embedded are an official Diamond Systems UK distributor and can supply the EMERALD-MM-8PL-XT.
Emerald-MM-8PL from Diamond Systems offers 8 multi-protocol serial ports on a single PC/104 module with complete software configurability via the operating system. Each port can be individually selected for RS-232, RS-422, or RS-485 under software control. Both local-echo and non-local-echo modes are supported for RS-485. I/O addresses and interrupt levels are also programmable, with interrupt sharing available for any number of ports. Each port may further be enabled or disabled in software. All configuration data is stored in an on-board EEPROM that is loaded automatically on power-up.
For applications where fixed addresses are desired, four groups of preset addresses are available with jumper settings that override the programmed settings. Line termination for RS-422/485 modes is also jumper-selectable.
Diamond Systems’ Emerald-MM-8PL offers 8 convenient digital I/O lines. The direction of each line is independently programmable. Diamond’s Universal Driver software provides software support for these digital I/O lines.
Two I/O headers are provided, with four serial ports and four digital I/O lines 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-8PL from Diamonds Systems is based on the industry-standard 16C654 quad serial port IC. Two ICs provide a total of 8 serial ports. Each port contains 64-byte transmit and receive FIFOs to support the high-speed 460.8kbps data rates. Drivers are available for a wide range of operating systems including Windows 10 and Linux.
Note to existing customers: Emerald-MM-8PL is a form-fit-function replacement for our previous product Emerald-MM-8P (EMM-8P-XT) with the single exception that the maximum RS-232 data rate is limited to 115.2Kbps vs. 460.8Kbps on EMM-8P-XT. This change is due to the end of life of the RS-232 transceiver used on EMM-8P-XT. Except for this component, all other components and the PCB are the same between the two boards.
| Overview | |
|---|---|
| Brand & Model | Diamond Systems EMM-8PL-XT |
| 8-Channel RS-232/422/485 Serial Port PC/104 Module | |
| Features | Compact Industrial Rugged |
| Serial Ports | |
| Number of serial ports | 8 |
| Protocols | RS-232, RS-422, RS-485 (local and no echo) |
| Configuration | All features software configurable |
| Maximum baud rate | 115.2kbps |
| Communications parameters | 5, 6, 7, or 8 data bits; Even, odd, or no parity |
| Short circuit protection | Continuous, all outputs |
| RS-232 mode | |
| Input Impedance | 3KΩ min |
| Input voltage swing | ±30V maximum |
| Output voltage swing | ±5V min, ±7V typical |
| RS-422/RS-485 modes: | |
| Differential input threshold | -0.2V min, +0.2V max |
| Input impedance | 12KΩ minimum |
| Input current | +1.0mA max (Vin = 12V) |
| -0.8mA max (Vin = -7V) | |
| Differential output voltage | 2.0V min (RL=50Ω) |
| High/low states differentia | 0.2V max |
| output voltage symmetry | |
| Digital I/O | |
| Number of I/O lines | 8 in, 8 out |
| Input voltage | Low: -0.3V min, 0.8V max |
| Output voltage | Low: 0.0V min, 0.4V max (IOL = 6mA max) |
| General | |
| I/O header | 2 40-position (2×10) .025″ square pin header on .1″ centers; |
| Headers mate with standard ribbon cable (IDC) connectors | |
| Dimensions | 3.55″ x 3.775″ |
| Power supply | +5VDC ±10% |
| Current consumption | 160mA typical, all outputs unloaded |
| Operating temperature | -40°C to +85°C standard, all versions |
| MTBF | 490,500 hours |
| RoHS | Compliant |
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