Comprehensive Product Summary: ADLINK NuDAM ND‑6011 High‑Gain Analog/Thermocouple Input Module

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### 1. Product Overview

Product Name: NuDAM High‑Gain Analog/Thermocouple Input Module
Model: ND‑6011 (also referenced as NuDAM‑6011/D for LED display version)
Series: NuDAM 6000 Series Distributed Data Acquisition Modules
Article Number: ND‑6011 / Part No. 91‑21001‑001
Manufacturer: ADLINK Technology Inc.
Manufacturer Address: 9F, No.166 Jian Yi Road, Chungho City, Taipei, Taiwan, R.O.C.
Website: [www.adlinktech.com](http://www.adlinktech.com)
Telephone: +886‑2‑8226‑5877
Fax: +886‑2‑8226‑5717

Product Status: End‑of‑Life (EOL)
EOL Notice No.: 20020925‑004
EOL Publication Date: September 25, 2002
Reason for EOL: Material discontinuation, market phase‑out, and replacement by newer products.
Suggested Replacement: None specified.
Warranty: Standard ADLINK limited warranty applies to remaining stock.

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### 2. Key Features

- High‑Gain Analog Input: One differential analog input channel with programmable gain and voltage range from ±15 mV to ±2.5 V.
- Thermocouple Compatibility: Direct thermocouple connection with built‑in Cold Junction Compensation (CJC) for accurate temperature measurement.
- Multi‑Range Input: Supports voltage, current, and thermocouple input types with programmable ranges.
- High Isolation: 5000 Vrms isolation for analog‑to‑digital channel (2500 Vrms for ND‑6011/D version).
- Digital I/O Integration: Two open‑collector digital outputs (DO) and one digital input (DI) that can function as an event counter.
- Programmable Alarms: High/low alarm thresholds with digital output signaling for external alarm devices.
- Watchdog Protection: Dual watchdog system—internal (150 ms) and host‑programmable (100 ms to 25.5 s)—for system reliability.
- RS‑485 Communication: Two‑wire serial interface supporting baud rates from 1200 bps to 115.2 kbps.
- Software Calibration: Fully programmable offset and span calibration without manual adjustment.
- LED Display (D Version): 5½‑digit LED display for real‑time analog value visualization.
- Ease of Integration: Compact, software‑configurable, and compatible with NuDAM Administration utilities for setup and monitoring.

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### 3. Technical Specifications

Interface:
- Communication: RS‑485, 2‑wire differential
- Baud Rates: 1200, 2400, 4800, 9600, 19.2 k, 38.4 k, 115.2 k bps (highest rate supported on firmware ≥ A4.00)
- Protocol: ASCII‑based command/response with optional checksum

Analog Input:
- Channels: 1 differential input
- Resolution: 16 bits
- Input Types: Voltage, current, thermocouple
- Voltage Ranges (programmable): ±15 mV, ±50 mV, ±100 mV, ±500 mV, ±1 V, ±2.5 V
- Current Range: ±20 mA (via external 125 Ω precision resistor)
- Thermocouple Types: J, K, T, E, R, S, B, N, C
- J: 0–760 °C K: 0–1370 °C T: –100–400 °C E: 0–1000 °C
- R/S: 500–1750 °C B: 500–1800 °C N: –270–1300 °C C: 0–2320 °C
- Accuracy: ±0.4 % of full‑scale range
- Sampling Rate: 10 Hz nominal
- Bandwidth: 4 Hz

Digital Input:
- Channels: 1 (DI0)
- Logic 0: ≤ +1 V Logic 1: +2 V to +30 V
- Pull‑up Resistor: 10 kΩ
- Max Input Current: 0.5 mA
- Function: General‑purpose input or event counter (max 50 Hz)

Digital Output:
- Channels: 2 (DO0/DO1) open‑collector
- Max Sink Current: 50 mA per channel
- Max Voltage: 30 V DC
- Max Power Dissipation: 300 mW
- Function: Alarm output or general‑purpose control

Isolation:
- Analog Channel Isolation: 5000 Vrms (2500 Vrms for ND‑6011/D)

Power Requirements:
- Supply Voltage: +10 V to +30 V DC
- Power Consumption: 0.76 W (1.68 W for ND‑6011/D with LED display)
- Power Failure Threshold: 4.65 V

Environmental:
- Operating Temperature: 0 °C to +60 °C (typical for NuDAM modules)
- Storage Temperature: –25 °C to +85 °C
- Humidity: 5 % to 95 % RH, non‑condensing

Mechanical:
- Mounting: DIN‑rail or panel mount
- Enclosure: Industrial‑grade plastic housing
- Isolation: Optically isolated communication and signal paths

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### 4. Functionality

Operation Principle:
The ND‑6011 converts low‑level analog or thermocouple signals into digital data via a 16‑bit ADC. The internal microprocessor processes, scales, and transmits data through the RS‑485 network. Built‑in CJC compensates for thermocouple cold‑junction errors, enabling direct temperature measurement without external compensation.

Use Cases:
- Industrial process monitoring and control
- Temperature measurement using thermocouples (J, K, T, E, R, S, B, N, C)
- Low‑level voltage or current signal acquisition
- Remote data acquisition over RS‑485 networks
- Alarm and event monitoring in automation systems

Applications:
- Factory automation and process control
- Environmental and laboratory monitoring
- Energy management and equipment diagnostics
- SCADA and distributed I/O systems

Compatibility:
- Fully compatible with ADLINK NuDAM Administration software
- Integrates with NuDAQ and other ADLINK data acquisition systems
- RS‑485 multi‑drop network supports up to 255 addressable modules

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### 5. Components & Accessories

Included Components:
- ND‑6011 module unit
- Terminal block connectors for signal and power wiring
- User documentation and command reference

Optional Accessories:
- External 125 Ω precision resistor for current measurement
- RS‑232/RS‑485 converter (e.g., ADLINK NuDAM‑6520)
- DIN‑rail mounting kit
- Power supply (10–30 V DC regulated)

Connectors & Pin Assignments:
1 – IN+ Analog input positive
2 – IN– Analog input negative
3 – DO1/HI Digital output 1 / High alarm
4 – DI0/EV Digital input / Event counter
5 – DO0/LO Digital output 0 / Low alarm
6 – DEFAULT* Initialization pin (short to GND for default state)
7 – DATA+ RS‑485 positive
8 – DATA– RS‑485 negative
9 – +Vs Power (+10 V to +30 V)
10 – GND Power ground
11 – TC(+) Thermocouple positive terminal
12 – TC(–) Thermocouple negative terminal

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### 6. Installation & Setup

Requirements:
- Host computer with RS‑232 port and RS‑485 converter (NuDAM‑6520 recommended)
- Power supply: +10 V to +30 V DC
- NuDAM Administration software utility

Initialization Procedure:
1. Connect the module to the RS‑485 network.
2. Short the DEFAULT* pin to GND and power ON to enter default mode.
3. Default parameters: Address 00, Baud 9600 bps, Checksum disabled, Watchdog disabled.
4. Use the NuDAM Administration utility to assign a unique address and desired baud rate.
5. Remove the short from the DEFAULT* pin and reboot to apply settings.

Mounting Options:
- DIN‑rail or panel mounting
- Ensure adequate ventilation and isolation from high‑voltage sources

Wiring Examples:
- Differential Voltage Input: Connect signal + to IN+, signal – to IN–.
- Thermocouple Input: Connect thermocouple leads to TC(+) and TC(–).
- Current Input: Connect through external 125 Ω resistor between IN+ and IN–.
- Digital I/O: Connect external relays, LEDs, or TTL signals as per open‑collector configuration.

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### 7. Performance & Capabilities

Sampling & Conversion:
- Sampling Rate: 10 samples per second
- Bandwidth: 4 Hz (anti‑aliasing filter)
- Conversion Resolution: 16 bits
- Conversion Accuracy: ±0.4 % FSR

Event Counter:
- Max Frequency: 50 Hz
- Counter Range: 0–65535 counts

Digital Output Drive:
- Max 30 V DC, 50 mA sink per channel
- Suitable for driving relays, SSRs, or alarm indicators

Watchdog & Safety:
- Internal watchdog: 150 ms cycle
- Host watchdog: Programmable 100 ms to 25.5 s
- Safety output state configurable for host failure

Limitations:
- Single analog input channel (not multiplexed)
- Input voltage must not exceed ±30 V relative to AGND
- EOL product—no longer in production or supported for new designs

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### 8. Standards & Compliance

- Electrical Isolation: Up to 5000 Vrms (analog to system)
- EMC/EMI: Designed for industrial environments (compliance with CE standards typical for NuDAM series)
- Safety: Meets industrial low‑voltage and insulation requirements
- Firmware Compatibility: Supports firmware revisions ≥ A4.00 for 115.2 kbps operation and A4.60 for extended thermocouple ranges
- RoHS/CE: Earlier production predates RoHS; compliance not guaranteed for legacy units

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### 9. Additional Information

Calibration:
- Software‑based offset and span calibration via RS‑485 commands
- Calibration voltages:
- ±15 mV → 0 mV offset, +15 mV span
- ±2.5 V → 0 V offset, +2.5 V span
- Thermocouple calibration: Apply reference mV values per type (e.g., J type 0–50 mV)
- CJC calibration: Each count ≈ 0.0153 °C adjustment

Maintenance:
- Periodic recalibration recommended annually
- Keep terminals clean and free of oxidation
- Avoid exposure to vibration, moisture, or corrosive gases

Firmware & Software Support:
- Command‑set compatible with other NuDAM 601x modules
- Supported commands include configuration, data readout, calibration, alarm control, and watchdog management
- Data formats: Engineering units, % FSR, Two’s complement, Ohms

Warranty & Service:
- One‑year limited warranty from shipment date
- Warranty void if product modified, misused, or serial number removed
- Repairs available through ADLINK service centers (Taipei HQ)
- Contact: service@adlink.com.tw or nudam@adlink.com.tw

End‑of‑Life Support:
- Limited technical assistance available for legacy installations
- No replacement model specified; users may migrate to ADLINK’s modern distributed I/O platforms

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### Summary

The ADLINK NuDAM ND‑6011 is a robust, high‑gain analog and thermocouple input module designed for precision measurement and industrial data acquisition over RS‑485 networks. Featuring a 16‑bit ADC, programmable input ranges, built‑in cold‑junction compensation, and integrated digital I/O, it provides a versatile solution for temperature and low‑level signal monitoring. Its modular design, software configurability, and watchdog protection make it suitable for distributed control systems and remote monitoring applications. Although discontinued, the ND‑6011 remains a technically advanced example of early industrial DAQ modules, offering high isolation, flexible configuration, and reliable performance in demanding environments.