The main products

Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,Brand advantage: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

Products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, papermaking, printing, textile printing and dyeing, machinery, electronics, automobile manufacturing, tobacco, plastics machinery, electric power, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution and so on.

5X00106G01 Power supply module

However, Standards have not been drawn–up for all types of machines. For machine tools for metal working, robots, and automated manufacturing systems, some Draft Standards and final Standards do exist, e.g. type C Standards. In many cases, Category 3 acc. to EN 954–1 is defined in these Standards for the safety–related controls. The basic requirement of this category is: ”Single–fault fail–safety with partial fault recognition”. Generally, this requirement can be fulfilled using a 2–channel system structure (redundancy). Sub–areas of a machine control can also be classified with other Categories – B, 1, 2, or 4 according to EN 954–1.

When engineering the drive components, safety switching devices, contactors, shown in the circuit examples, it is absolutely necessary to carefully observe the associated connection information/instructions, technical data of the current Operating Instructions and Configuration Manuals as well as the appropriate Catalogs and Application Manuals.

Hazard analysis and risk assessment

According to the Machinery Directive 98/37/EC, the manufacturer of a machine or a safety component or the person or persons responsible for placing such equipment on the market is legally obliged to perform a risk analysis in order to determine all of the risks that may arise in connection with the machine or safety component concerned. He must design and construct the machine or safety component on the basis of this analysis. A risk assessment must identify all residual risks that need to be documented. For the technique to evaluate and assess these risks, among others, the following Standards should be carefully observed EN 292 ”General Design Guidelines for the Safety of Machinery”; EN 1050 ”Safety of Machinery, Guidelines for Risk Assessment” and EN 954 ”Safety–relevant Parts of Controls”. The machinery manufacturer or the company based in the European Economic Community or persons that they have nominated must make a legal declaration regarding the CE Conformance for the complete machine.

instructions and functions

SIGUARD safety combinations 3TK28/3TK29; circuit examples as well as the ”automatic start” and ”monitored start” functions are described in the ”Safety Integrated” Application Manual, Order No. 6ZB5000–0AA01–0BA1. SIRIUS power and auxiliary contactors 3 RT1 and 3 RH11 should be selected with positively–driven auxiliary contacts according to ZH1/457, IEC 60947–5–1. Contact reliability The auxiliary contacts, switching contacts of the switching devices and the line isolation equipment must be able to reliably switch low switching currents 17 V, 5 mA. Overvoltage limiting All of the switching devices, coils, inductances, brakes, etc., must be equipped, for EMC reasons and for reasons associated with the functional safety, with RC elements, varistors, diodes or diode combinations. These are intended to dampen overvoltages at switch–off if these damping elements are not already integrated in the devices. This also applies to switching devices controlled from PLC outputs. Note The selection of the overvoltage limiting function also influences the off delay of the devices. This effect must be carefully taken into account when engineering the system. Refer to NSK Low–Voltage Switchgear Catalog for selection and technical data