1756-OF8H 是 AB 羅克韋爾（Allen-Bradley）生產(chǎn)的一款模擬輸出模塊，屬于 ControlLogix 平臺(tái)的一部分。以下是該模塊的一些關(guān)鍵特性和應(yīng)用：
模擬輸出通道：1756-OF8 模塊配有八個(gè)（8）模擬輸出通道，可配置為 +/-10VDC 和 0-20 mA 的模擬輸出信號(hào) 。
高分辨率：在 21 mA 至 650 nA/bit 范圍內(nèi)具有 15 位分辨率，在 10.4V 至 320 μV/bit 范圍內(nèi)也具有 15 位分辨率 。
保護(hù)功能：模塊具備開路、短路和過電壓保護(hù)功能 。
轉(zhuǎn)換方法：使用 R-Ladder DAC、單調(diào)性且無失碼模塊轉(zhuǎn)換方法，并以整數(shù)模式（左對(duì)齊、2 補(bǔ)碼）IEEE 32 位浮點(diǎn)形式提供寄存器數(shù)據(jù) 。
掃描時(shí)間：浮點(diǎn)格式的掃描時(shí)間為 12 毫秒，整數(shù)格式的掃描時(shí)間為 8 毫秒 。
隔離電壓：模塊的隔離電壓為 250 伏，在輸出通道和背板之間使用 1350 伏交流電測(cè)試 2 秒鐘 。
溫度代碼：具有 T4A（北美）、T4（ATEX）和 T4（IEC）溫度代碼，采用開放式外殼 。
工作溫度范圍：模塊的工作溫度范圍在 0 到 60 攝氏度之間，設(shè)計(jì)為在 10 到 500 赫茲的沖擊速率為 30 克和振動(dòng)為 2 克的情況下保持其功能 。
失調(diào)漂移：工作時(shí)，失調(diào)漂移為 50 ppm/°C 和 0.1 ppm/°C，溫度相關(guān)增益漂移為 25 ppm/°C 和 50 ppm/°C（電流） 。
總模塊誤差：模塊的總誤差為 0.15%（電壓模式）和 0.3%（電流模式） 。
1756-OF8H 模擬輸出模塊可用于控制和調(diào)制電氣和現(xiàn)場(chǎng)設(shè)備，傳輸或重新傳輸信號(hào)，以便與測(cè)量和記錄儀器接口或用于任何其他目的 。
The 1756-OF8H is an analog output module manufactured by AB Rockwell (Allen-Bradley) as part of the ControlLogix platform. Here are some of the key features and applications of the module:
Analog output channels: The 1756-OF8 module is equipped with eight (8) analog output channels that can be configured for +/-10VDC and 0-20 mA analog output signals.
High resolution: 15-bit resolution in the 21 mA to 650 nA/bit range, and 15-bit resolution in the 10.4V to 320 μV/bit range.
Protection function: The module has the functions of open circuit, short circuit and overvoltage protection.
Conversion method: Use R-Ladder DAC, monotonic and lose-free module conversion method, and provide register data in integer mode (left-justified, 2-complement) IEEE 32-bit floating-point form.
Scanning time: The scanning time is 12 ms for floating point format and 8 ms for integer format.
Isolation voltage: The module has an isolation voltage of 250 volts and is tested for 2 seconds using 1350 volts AC between the output channel and the backplane.
Temperature codes: Available with T4A (North America), T4 (ATEX) and T4 (IEC) temperature codes in an open housing.
Operating temperature range: The module has an operating temperature range between 0 and 60 degrees Celsius and is designed to maintain its function at an impact rate of 30 grams and a vibration of 2 grams from 10 to 500 Hertz.
Offset drift: When operating, offset drift is 50 ppm/°C and 0.1 ppm/°C, and temperature-dependent gain drift is 25 ppm/°C and 50 ppm/°C (current).
Total module error: Total module error is 0.15% (voltage mode) and 0.3% (current mode).
The 1756-OF8H analog output module can be used to control and modulate electrical and field equipment, transmit or retransmit signals for interface with measuring and recording instruments or for any other purpose.
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