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.

IC698CRE040 combustion engine card

On the control modules, which are inserted into the power module, each control module is equipped with a safety relay to implement the STO function. For double–axis modules, the safety relay acts on both axes. Everyline infeed includes an integrated main contactor, which can be used for the Safe Torque Off function (STO).

The power unit controls the power feed to the individual motor windings. The gating logic on the control module clocks the 6 power transistors using a specific pattern to generate a rotating field. An optocoupler is connected between the gating logic and each control amplifier of a power transistor to provide electrical isolation. Power supply P5 of the optocoupler is fed via the NO contact of safety relay K1. When the Safe Torque Off function is activated, the NO contact of the safety relay is opened and the NC contact (= feedback contact) is closed. The NO and NC contacts in the safety relay are positively driven. The state of the safety relay (NO contact) must be evaluated via the feedback signal contact AS1/AS2.

When the Safe Torque Off function

 is active (in the normal state without fault) the contacts of the NO contact –K1 are open and the power supply to the optocouplers is interrupted. In order that the control module of the SIMODRIVE 611 identifies the state Safe Torque Off, and processes it in the sequence control, the logical signal level of terminal 663 is signaled to the control module via an optocoupler. If the Safe Torque Off function is active, this input immediately generates a pulse inhibit via the control logic. The feedback signal contact of the safety relay must be evaluated in every case and must be used to directly control a second shut off signal path.The internal circuit of the line contactor via terminal 48 is shown symbolically. The control logic of the line and pre–charging contactors has a somewhat complex design, in order to guarantee a defined switch–on and switch–sequence. Before interrupting the connection NS1–NS2, the line contactor must always be opened via terminal 48, or must be opened at the same time. The jumper between NS1 and NS2 when the unit is shipped must be removed.

A two–channel structure 

with suitable fault identification for the safety functions can be configured by using an appropriate circuit. In order to implement the Safe Torque Off safety function in two channels, the line contactor integrated in the infeed modules as well as the safety relay integrated in the control modules should be used. The positively driven NC contacts of the line contactor and the safety relay should be evaluated as feedback signal. The line fuses and feeder components should be selected and dimensioned according to the regulations as specified in Catalog NC60 as well as the Configuration Manual. Main switch –Q0 is used as line disconnection device according to EN 60204–1:2006 and is not considered in the sense of functional safety. There is no electrical isolation from the line supply with the Safe Torque Off function. As a consequence, this function does not represent a protective device against electric shock. The safety functions integrated in the SINUMERIK 840D pl (SINUMERIK Safety Integrated) in conjunction with the SIMODRIVE 611D modules are not part of this documentation. The CNC control modules SINUMERIK 840D have no influence on the evaluation of the safety functions