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.

1C31224G01 Analog input electronic module

The drives must have been stopped before terminal 663 is inhibited and the start inhibit is activated. The drives can be stopped, e.g. by ramping down the drives in a controlled way using the NC program, inhibiting the drive–enable terminal 64 or the axis–specific controller enable, terminal 65. Under fault conditions, the equipment must be safely disconnected and isolated from the line supply using the line contactor. If a fault occurs when actuating the start inhibit, then this fault must be removed before the isolating mechanical protective devices (e.g. guards) to the working space of the machine or plant are opened. After the fault has been removed, the handling sequence for the start inhibit must be repeated. Under fault conditions, all of the drives, machine and the plant must be shutdown. If one of the following faults occurs with terminal 663 de–energized and the protective devices withdrawn, then under all circumstances, EMERGENCY STOP must be immediately initiated: The feedback signaling contacts AS1/AS2 remain open; the start inhibit is not activated. There is a fault in the external control circuit itself. There is a fault in the signal cables of the feedback signal contact.

Checking the start inhibit

 The safety relay is an important component associated with the safety and availability of the machine. This is the reason that if the system functions incorrectly, the control unit together with the safety relay must be replaced. Function checks are required at regular intervals in order to detect an incorrect function. The intervals specified in the appropriate regulation BGV A1 §39, Paragraph 3 are decisive for the intervals in which the system must be checked. This is the reason that the function check/test must be performed – depending on the application conditions; however, it must be performed at least once a year and in addition, after the system has been commissioned for the first time as well as when modifications and repairs have been made. The drive pulses must be inhibited when the voltage at terminal 663 is removed. Further, the feedback signal contacts AS1/AS2 of the start inhibit must close. The drive ”coasts down”. Withdrawing the protective devices, e.g. opening the protective door/guard while the drive is running. The drive must be braked as quickly as possible and then shut down. In so doing, no inadmissible hazard may occur. All of the possible fault/error cases that can occur must be individually

All of the drives of the machine/plant

 must be disconnected and isolated from the line supply via the line contactor. If the control of the start inhibit has been correctly integrated in the external safety–relevant drive control – and has been carefully checked – the drives in the isolated working zone of the machine are secure against undesirable starting and personnel can enter or access the hazardous zone that has been restricted.simulated in the signal lines/cables between the feedback signal contacts and the external control as well as the signal evaluation functions of this control – for example, by interrupting the start inhibit monitoring circuit at terminal AS1–AS2. The monitoring circuit AS1 – AS2 should be disconnected for this purpose. In all of the simulated fault situations, the line contactor must isolate all of the drives of the machine or system from the line supply. If there is a connection between the NE or monitoring module power supply, terminal 500/M500 to the power DC link P600/M500, then this must be safely and reliably disconnected at the same time as the line contactor is opened, e.g. using contactors. ! Warning Only qualified personnel may perform these checks carefully observing the necessary safety measures. After the start inhibit check has been completed, all of the changes made to the control as part of this check must be reversed.