产品介绍：
微型Modbus/TCP打到RTU/ASCII网关，支持PoE，1个RS-422/485
Cost-effective Modbus/TCP to RTU/ASCII Gateway
Supports Modbus/TCP master and slave
Supports Modbus RTU/ASCII master and slave
Contains a 32-bit MCU that efficiently handles network traffic
10/100 Base-TX Ethernet, RJ-45 x 1 (Auto-negotiating, auto MDI/MDIX, LED Indicators)
Includes redundant power inputs: PoE (IEEE 802.3af, Class 1) and DC jack
Allows automatic RS-485 direction control
Supports TCP, UDP, HTTP, DHCP, BOOTP and TFTP protocols
Supports UDP responder for device discovery
Allows easy firmware update via the Ethernet
Contains a tiny Web server for configuration
Male DB-9 or terminal block connector for easy wiring
Tiny form-factor and low power consumption
RoHS compliant with no Halogen
Made from fire retardant materials (UL94-V0 Level)
Model 264 传感器在全球的安装数量已高达上百万只，是HVAC 楼宇自动化、高精度医药和卫生保健设施中低压差测量应用的“标准”产品。Model 264 型超低差压传感器使用闭端不锈钢焊接电容感应元件，仅要求极小的放大倍率，可为各类关键安装应用提供出色的精度和长期可靠性。Model 264 采用稳固设计，使用黄铜倒钩接头、卡轨安装架、以及可选的导管盖，可实现简单、稳定的安装。特性·**支持10 PSI 超压·安装方便·0~5VDC 或4~20mA 模拟输出·误接线全保护·使用非调整直流电源供电·满足CE 标准应用·暖通空调（HVAC）·能源管理系统·VAV 及风扇控制·洁净工程·OEM·实验室及通风橱控制·烘箱增压及炉通风控制·医疗仪器及设备