POSITAL新一代磁电绝对值旋转编码器IXARC系列新增SSI通讯接口产品。
SSI(同步串行接口)是一种广泛应用到各种传感器,包括编码器的通讯协议。SSI是一种串行通讯系统,通过RS-422通讯标准,将传感器点对点接入PLC或微处理器。SSI可以提供高传输速率并支持高达1200米的传输距离。(最大波特率取决于传输距离)大多数主流PLC厂商都支持SSI协议。
与POSITAL的NEXTGEN计划推出的其他IXARC编码器一样,新的SSI系列编码器搭载了先进的TMR(隧道磁阻)传感器,用于单圈的角度位置测量。TMR传感器有着更稳定和更低的温度敏感性,相较于上一代的霍尔元件,TMR传感器对磁场的微小变化反应更加灵敏,为新一代磁电编码器打开了通向18位更高单圈分辨率的大门。新一代IXARC编码器的另一项关键创新是自研的新ASIC,支持无电池多圈计数。每当编码器转轴旋转一圈,连接到ASIC的韦根传感器都能提供一个信号脉冲和足够的电流来激活ASIC中的计数电路。通过这一系统,即使在断电的情况下,主机转轴的每一圈旋转都能准确的记录到编码器的非易失性存储器中。圈数的存储再也不需要电池。
新一代IXARC编码器的外壳也得到了改进,紧凑的焊接型外壳也已经推出。出线方向除了轴向和径向外,还有45°斜出线的版本可供选择,适用于狭小环境的安装。
POSITAL的SSI接口编码器是可编程编码器,分辨率,旋转方向,码制以及预置值均可通过POSITAL的编程工具UBIFAST来轻松实现。
POSITAL’s new generation of magnetoelectric absolute rotary encoder IXARC series adds SSI communication interface products.
SSI (Synchronous Serial Interface) is a communication protocol used in a wide variety of sensors, including encoders. SSI is a serial communication system that connects sensors point-to-point to a PLC or microprocessor through the RS-422 communication standard. SSI can provide high transmission rates and support transmission distances up to 1200 meters. (Maximum baud rate depends on transmission distance) Most major PLC manufacturers support SSI protocol.
Like other IXARC encoders from POSITAL’s NEXTGEN program, the new SSI series is equipped with an advanced TMR (tunnel reluctance) sensor for angular position measurement in a single turn. TMR sensors are more stable and have lower temperature sensitivity. Compared to the previous generation of Hall components, TMR sensors are more sensitive to small changes in the magnetic field, opening the door to a new generation of magnetoelectric encoders with higher single-turn resolution of 18 bits. Another key innovation in the new generation of IXARC encoders is a new self-developed ASIC that supports battery-free multi-turn counting. Each time the encoder rotates the shaft, the Wiegand sensor connected to the ASIC provides a signal pulse and enough current to activate the counting circuit in the ASIC. Through this system, even in the case of power failure, every rotation of the main engine shaft can be accurately recorded in the non-volatile memory of the encoder. Batteries are no longer needed for the number of turns stored.
The housing of the new generation IXARC encoder has also been improved, and a compact welded housing has also been introduced. In addition to axial and radial outlet directions, 45° oblique outlet versions are available for installation in narrow environments.
POSITAL’s SSI interface encoder is a programmable encoder, resolution, rotation direction, code size and preset values can be easily implemented through POSITAL’s programming tool UBIFAST.