The DGH D4262 is a computer-to-analog output module that translates ASCII serial commands into configurable voltage or current signals for external system control. Operating over RS-232 or RS-485 serial interfaces at rates from 300 to 38,400 baud, it bridges host computers and industrial/laboratory equipment with 12-bit resolution and 500Vrms output isolation. The module accepts +10 to +30VDC unregulated power and delivers precision analog outputs across eight selectable ranges: 0–1V, ±1V, 0–5V, ±5V, 0–10V, ±10V, 0–20mA, and 4–20mA.
## Technical Specifications
• **Output Resolution:** 12-bit DAC with 0.1% FSR accuracy (integral and differential nonlinearity)
• **Output Isolation:** 500Vrms
• **Voltage Output Ranges:** 0–1V, ±1V, 0–5V, ±5V, 0–10V, ±10V; 5mA max drive
• **Current Output Ranges:** 0–20mA, 4–20mA; ±12V compliance
• **Temperature Stability:** ±30µV/°C (voltage), ±1.0µA/°C (current); ±50ppm/°C span tempco
• **Settling Time:** 300µs typical (1ms max) to 0.1% FS
• **Output Protection:** 240VAC (current outputs), ±30V (voltage outputs)
• **Power Consumption:** 0.75W max (voltage), 1.0W max (current)
• **Serial Communication:** ASCII protocol, NRZ asynchronous (1 start, 7–8 data, parity, 1 stop bit)
• **Addressability:** Up to 124 units per RS-485 port; RS-485 range to 4,000 feet
• **Monitoring:** 8-bit ADC for output signal integrity verification
• **Digital Inputs:** Three per module; ±30V withstand capability
## Key Features
• Programmable high/low output limits and engineering unit scaling
• Nonvolatile digital calibration
• “Bumpless” manual control inputs with user-selectable slope (D4000 series)
• Programmable watchdog timer for graceful shutdown on host failure (D4000 series)
• Multi-drop RS-485 addressing for distributed control architectures
## Typical Applications
Process control, laboratory instrumentation, distributed analog signal generation, industrial automation with serial host interfaces.
## Compatibility & Integration
Direct connection to dumb terminals, modems, and any host supporting ASCII serial communication. Compatible with existing D4200 and D4000 family products.
