User Manual of EM760 High-Performance Inverter * In the case of D>33%, the braking unit will work intermittently. Otherwise, an over-temperature protection fault will occur. 9.2.1 Selection of Connecting Wires Since all braking units and braking resistors work at high voltage (>400VDC) and in the discontinuous status, please select appropriate wires. See Table 9-3 for the wiring specifications of the main circuit. Use the cables with the conforming insulation levels and cross-sections. Table 9-3 Wire Specifications of Braking Units and Braking Resistors Flexible cables have higher flexibility.
Because cables maybe in contact with high-temperature devices, it is recommended to use copper-core and heat-resistant flexible cables or flame-retardant cables. The braking unit should be close to the inverter as much as possible and no more than 2m far away from the inverter. Otherwise, the DC-side cables should be twisted and used with magnetic rings to reduce radiation and inductance. The lengths of connecting wires of the braking unit, braking resistor and inverter are shown in Fig. 9-1. Fig.
9-1 Wire Length 9.3 Multi-functional IO expansion card 9.3.1 EM760-IO-A1 231 Specification and model Average Braking Current I (A) av Peak Braking Current I (A) max Cross-section (mm2) of Copper-core Cable BR100-045 45 75 10 BR100-160 75 150 16 BR100-200 100 200 25 BR100-315 120 300 25 BR100-400 200 400 35 BR100-500 250 450 35 BR100-450-6 250 450 35 Item Specifications Description Input 3-channel multi-functional digital inputs X8, X9, X10 4-channel analog voltage signal input Voltage input of -10V~+10V and PT100/PT1000/KTY84/PTC temperature sensors are supported.
Upon connection to corresponding control terminal based on the type of the motor temperature sensor, select corresponding type of sensors through F07.03. PT100/PT1000 sensors require short- circuit cap for PT model selection.