AUMA, manufacturer and developer of modular electric actuators for the water industry, has introduced a single-mode fibre optics (FO) interface capable of supporting automation solutions, with a range of up to 15 kilometres between field devices. AUMA first equipped its actuators with integral FO fieldbus interfaces in the late 1990s.
According to the press release issued by AUMA, an enlarged actuator terminal compartment simplifies cable connection and the new FO solution can be configured as required. Water sector applications set to benefit include those with wide distances between actuators such as sewage treatment works.
The key benefit of fibre optics is transmission over large distances. Resistance to EMC ensures data and supply lines can be installed in one duct. Redundant data transmission is achieved by simple loop topology; galvanic isolation is integrated virtually and overvoltage damage is prevented.
According to the company, should the optical signal fall short of its required level, an alarm is transmitted to the DCS via fieldbus.
The press release also points out that FO cable checks are integrated into the self-monitoring capability of AUMA’s new Generation 2 actuator controls. Signals are transmitted to the control room in compliance with AUMA or NAMUR classifications. Further, actuators can be specified with the new FO interface either in line or with star/loop topology.
