Diamond Systems Emerald-MM-DIO 4-Port RS-232 and 48 Digital I/O PC/104 Module
Diamond Systems Digital Input Board. Current: 0.3 mA (high state).
- Model
- Diamond Systems Emerald-MM-DIO
- Calibration
- Available on request
- Price
- $375
- Status
- In stock
- RFQ ref
- Emerald-MM-DIO
This unit
The Emerald-MM-DIO is a PC/104 module that combines four RS-232 serial ports with 48 digital I/O lines on a single board for embedded systems. It delivers serial communication via 16C554 UARTs supporting up to 115.2 Kbps (460.8 Kbps with optional crystal), plus individually programmable digital I/O with edge detection on 24 lines. The module fits the tight footprint constraints of PC/104 applications while providing industrial-temperature operation and full interrupt sharing across multiple ports.
Technical Specifications Serial Ports
4× RS-232 interfaces with 16C554 UARTs (16-byte FIFOs)
Data rates to 115.2 Kbps standard; 460.8 Kbps available with optional crystal
Full 8-signal set plus ground per port
Dual 20-pin (2×10) I/O headers at 0.1" centers
Jumper-selectable from 8 I/O address combinations and 11 interrupt levels
Interrupt sharing fully supported with dedicated status register Digital I/O
48 lines organized into six 8-bit ports
Individual bit-level programmability for input or output
Inverting logic: logic 0 tri-states and pulls high via 10 kΩ resistor (input mode); logic 1 drives low
Output current: 0.3 mA (high state), 8 mA (low state)
Edge detection on 24 lines with selectable high/low edge triggering and interrupt generation
Two 2×25-pin I/O headers Physical & Electrical
Dimensions: 3.55" × 3.775"
Power: +5 VDC ±10%, 5V-only operation
Typical current draw: 80 mA (all outputs unloaded)
Operating temperature: −40°C to +85°C (extended versions available)
Humidity: 5% to 95% non-condensing
Key Features
PC/104 form factor with 8-bit and 16-bit ISA bus headers
Bit-level input/output control eliminates need for external logic
Edge-triggered interrupts support event-driven application designs
Full interrupt sharing allows stacking multiple modules on single IRQ
Industrial temperature range for harsh environments
Typical Applications Embedded data logging, industrial control interfaces, sensor array multiplexing, legacy serial device bridging, distributed I/O expansion in confined spaces.
Compatibility & Integration Supports virtually all embedded operating systems via industry-standard PC/104 ISA interface. Universal Driver software provided for edge detection configuration and interrupt management.
Specifications
| Parameter | Value |
|---|---|
| Voltage / Current Range | '+5 VDC ±10%, 80 mA typical |
Diamond Systems Emerald-MM-DIO — Repair & Calibration Service
Aumictech offers NIST-traceable calibration and repair for the Diamond Systems Emerald-MM-DIO. Calibration covers per-channel threshold accuracy, input leakage current, logic level high/low margins, and signal timing verification. All calibrations ship with a NIST-traceable certificate. Turnaround is typically 1–3 business days after receipt.
Common Diamond Systems Emerald-MM-DIO faults: ESD-damaged input protection, failed driver ICs, connector pin damage. Most failures involve ESD-damaged input protection circuitry, failed logic driver ICs, or mechanical connector pin damage. Board-level component replacement is standard practice.
Diamond Systems Emerald-MM-DIO price
This Diamond Systems Emerald-MM-DIO is listed at $375. Calibration is available separately from $450. Contact us for volume pricing or if you need multiple units.
Diamond Systems Emerald-MM-DIO calibration cost
NIST-traceable calibration for the Diamond Systems Emerald-MM-DIO is $450 (standard — pass/fail certificate and calibration sticker) or $650 (full measured data at every test point, reference standards documented, traceability chain included). Calibration for this instrument covers per-channel threshold accuracy, input leakage current, logic level high/low margins, and signal timing verification. Turnaround is 1 to 3 business days after receipt. See full calibration details →
