SM618 HollySys Input Module, Shanghai Sijian Intelligent Technology Co., Ltd. is engaged in technical development, technical consultation, technical transfer in the fields of intelligent technology, information technology, and automation technology, as well as the sales of electrical equipment, automation equipment, electronic products, communication products, and electromechanical products. Industrial automation products: PLC, DCS, sensors, frequency converters, encoders, relays, servo drives, soft starters, touch screens. Brands involved in the products include: Eurotherm, Schneider, Siemens, ABB, SICK, P+F, E+H, Yokogawa, Yamakawa, Mitsubishi, Emerson, Honeywell, FANUC, GE, Eaton Electrical, CT. SM618 is a 16-channel 48VDC contact-type digital input module in the series of hardware products. It connects to the backplane of the chassis via a 64-pin European connector and is used in conjunction with the corresponding terminal module to input 16 channels of contact-type digital signals from the field. The contact sensing voltage is 48VDC.
SM618 HollySys Input Module, SM618 adopts a modular design with an overall structure of a cassette plug-in unit, installed on the chassis rail and secured with a latch. The anti-mixing pin on the module's backplane is fixed. In the expandability design of the control unit cabinet, the Siemens S7-300 CPU314 I/O capability is 1024 digital points and 256 analog points, giving the system strong expandability. Other controls can be incorporated into the system as needed at any time without stopping the machine or altering the overall structure of the original system. DCS System Measurement Points and Hardware Introduction 1. System Measurement Point Statistics For DCS control systems, measurement points are mainly classified into analog input, analog output, digital input, and digital output, described as follows: 1. Analog Input DC loads should use DC contactors. If the control system mainly consists of AC loads and the DC load capacity is small, AC contactors can also be used entirely. However, the rated current of the contacts should be appropriately selected to be larger, and the rated voltage of the contactor contacts. Usually, the rated voltage of the contactor contacts is chosen to be greater than or equal to the rated voltage of the load circuit.
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