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.

MM-PM41400CPM+4000 Channel isolation module

The safety functions are initiated by the EMERGENCY STOP pushbutton, which can be released by turning, and which is connected through two channels. This has positively opening contacts. Fault exclusion is assumed for the positively opening contacts as well as for the mechanical system of the EMERGENCY STOP pushbutton. An accumulation of faults between two consecutive actuations of the EMERGENCY STOP pushbutton can result in the safety function being lost. This behavior corresponds to Category 3 The RESPOND subsystem has a two channel structure. The first channel is implemented using safety relay –K1. The line contactor in the line infeed forms the second channel. Both channels are simultaneously controlled from safety relay –A1. The positively opening NC contacts of the contactor and relay are tested as feedback signal contacts by –A1 at each start.

Application examples

An accumulation of faults between two consecutive actuations of the EMERGENCY STOP pushbutton is not detected: Basic as well as well–proven safety principles – such as the requirements regarding Category B – are maintained. Protective circuits are provided. When a component fails, the safety function is always maintained. The failure is detected. This structure corresponds to Category 3, according to EN 13849–1:2008.

) Opening the protective door stops the drive in a controlled fashion. After the stopping time has expired, the drive is safely switched into a no–torque condition. b) The supplementary safety function Emergency Stop results in the drive being safely stopped in a controlled fashion. After the stopping time has expired, the drive is safely switched into a no–torque condition As a result of the risk assessment, the required Performance Level for both safety functions is defined to be PLr = d. When the protective door is open, in normal operation, the DC link voltage should be kept

Preconditions to operate/move the drive

EMERGENCY STOP has been released and safety relay –A1 has been reset. Protective door is closed (position switch contacts –S4 and –S5 are closed). Safety relay –A2 is automatically started. _ Safety relay –K1 is controlled via the NO contact of –K6, from the instantaneous output (14) of safety relay –A3. Line contactor –K2 is controlled via the contacts of –K5 using contactor relay –K4, from the delayed output (28) of safety relay –A3. The drive DC link is charged. The control enable on the control module has a high signal from safety relay –A2. EMERGENCY STOP has been released and safety relay –A1 has been reset. The cascading input of –A2 has a high signal. When the protective door is opened, the position switch contacts –S4 and –S5 are opened. The instantaneous output (14) from –A2 supplies a low signal at the drive controller enable. –> The motor is stopped at the current limit. After the selected time at –A2 has expired, the delayed output (28) switches the cascading input (1) from –A3 to a low signal level.