1756-OF8H 模拟输出模块  调制解调器

【产品详情】

Allen-Bradley 1756-OF8H 是 ControlLogix 控制器平台的模拟输出模块。该模块主要具有八 （8） 个电压或电流输出通道，可配置为 0-20 mA 和 4-20 mA 电流输出信号以及 +/-10VDC 电压输出信号。1756-OF8H 在所有信号范围内的模块分辨率为 15-16 位。它带有内部数模转换器 （DAC），使用 R-Ladder DAC，单调无失码转换方法，数据格式为整数模式（左对齐，2 秒补码）IEEE 32 位浮点。此模块安装在 1756 ControlLogix 机箱上，仅占用一个插槽。它可以用作本地 IO 模块和远程 I/O 模块组件。对于信号线的端接，该模块配有可拆卸接线端子 （RTB）。该 RTB 可以替换为 1756-TBNH 或 1756-TBSH，并具有用户定义的机械 RTB 键控。使用 1756-TBNH 时的适用线径为 0.33-2.1 mm2 （22-14 AWG），用于单线连接和 0.33...1.3 毫米2 （22...16 AWG） 用于双线连接。1756-TBSH 仅支持单线连接，专为 0.33...1.3 毫米2 （22...16 AWG） 电线尺寸。1756-OF8H 的连续隔离电压额定值为 50V。模块隔离仅在输出通道到背板之间。每个输出通道不带单独的隔离。此外，该模块的开路检测时间仅适用于电流配置，最大过压保护为 +/- 24 VDC。

Allen-Bradley 的 1756-OF8H ControlLogix 电压/电流模拟输出模块是一款模拟输出模块，具有 8 个电压或电流输出，每个模块有一个 HART 调制解调器。它具有 -10.4336-10.4336V 和 0-21.2916mA 的可选电压/电流信号范围。1756-OF8H 的总输出额定值为 +/- 10V 或 0-20mA，所有范围的信号分辨率为 15-16 位。它还具有 230 mA @ 5.1 VDC 和 230 mA @ 24 VDC 的背板电流消耗，背板总功率为 6.54W。它的散热为 16.78 BTU/小时，功耗为 4.92W。1756-OF8H 的隔离电压为 50V，输出通道和背板之间的基本绝缘测试在 1500V AC 下持续 60 秒。

与其他模拟量 I/O 模块不同，1756-OF8H 提供开路检测，电路检测时间必须设置为低于 0.1 mA。其电流建立时间（无HART）略低于23ms，使用HART时低于37ms，电阻负载时电压建立时间为8.5ms至95%。它的校准精度（无HART）为0.1%（电压）和0.15%（电流），其标准校准间隔约为12个月。1756-OF8H 的失调漂移为 100 V/°C 或 200nA/°C，模块的整体模块误差为 0.15%（电压）或 0.3%（电流）。它具有 T4 北美、ATEX 和 IEC 温度代码，并具有开放式外壳等级。1756-OF8H 的工作温度范围在 0 摄氏度至 60 摄氏度之间，相对湿度为 5-95%，无冷凝。

1756-OF8H 模拟输出模块  调制解调器

【英文介绍】

Allen-Bradley 1756-OF8H is an analog output module for the ControlLogix controller platform. The module primarily has eight (8) voltage or current output channels that can be configured for 0-20 mA and 4-20 mA current output signals as well as +/-10VDC voltage output signals. The 1756-OF8H has a module resolution of 15-16 bits across all signal ranges. It comes with an internal digital-to-analog converter (DAC), uses R-Ladder DAC, monotone lossless code conversion method, and data format in integer mode (left-justified, 2-second complement) IEEE 32-bit floating-point. This module is installed in the 1756 ControlLogix chassis and occupies only one slot. It can be used as a local IO module and a remote I/O module component. For terminating signal lines, the module is equipped with detachable terminal blocks (RTB). This RTB can be replaced with 1756-TBNH or 1756-TBSH and has user-defined mechanical RTB keying. Applicable wire diameters are 0.33-2.1 mm2 (22-14 AWG) when using the 1756-TBNH for single wire connections and 0.33... 1.3mm 2 (22... 16 AWG) for two-wire connections. The 1756-TBSH supports single-wire connections only and is designed for 0.33... 1.3mm 2 (22... 16 AWG) Wire size. The 1756-OF8H has a continuous isolation voltage rating of 50V. Module isolation is only between the output channel and the backplane. There is no separate isolation for each output channel. In addition, the module's open circuit detection time is suitable for current configurations only, with a maximum overvoltage protection of +/ -24 VDC.

Allen-Bradley's 1756-OF8H ControlLogix Voltage/current analog Output module is an analog output module with eight voltage or current outputs, each with a HART modem. It has an optional voltage/current signal range of -10.4336-10.4336V and 0-21.2916mA. The 1756-OF8H has a total output rating of +/ -10V or 0-20mA and a signal resolution of 15-16 bits across all ranges. It also has backplane current consumption of 230 mA @ 5.1 VDC and 230 mA @ 24 VDC for a total backplane power of 6.54W. It has a heat dissipation of 16.78 BTU/ hour and a power consumption of 4.92W. The isolation voltage of the 1756-OF8H is 50V, and the basic insulation test between the output channel and the backplane lasts 60 seconds at 1500V AC.

Unlike other analog I/O modules, the 1756-OF8H provides open circuit detection, and the circuit detection time must be set to less than 0.1 mA. Its current build up time (without HART) is slightly less than 23ms, less than 37ms with HART, and voltage build up time with resistance load ranges from 8.5ms to 95%. Its calibration accuracy (HART free) is 0.1% (voltage) and 0.15% (current), and its standard calibration interval is about 12 months. The 1756-OF8H offset drift is 100 V/°C or 200nA/°C, and the module's overall module error is 0.15% (voltage) or 0.3% (current). It has T4 North America, ATEX and IEC temperature codes and is available in an open housing grade. The 1756-OF8H operates at a temperature range of 0 ° C to 60 ° C, with a relative humidity of 5-95% and no condensation.

1756-OF8H 模拟输出模块  调制解调器

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