Product Details

The RELIANCE 5433914 auxiliary power supply board is a discontinued multi-channel isolated power conversion circuit board for Reliance Electric legacy analog SCR DC drive rack systems, widely used in metallurgy, papermaking, rolling mill and other heavy-duty continuous production lines. It converts AC auxiliary input from the drive power unit into multiple groups of stable DC power supplies, supplying power for regulator boards, feedback transductor boards, gate drive boards, protection boards and I/O interface boards inside the drive rack.

This board adopts step-down rectification, filtering and voltage stabilization circuit design. It provides multiple independent isolated DC voltage outputs for analog operational amplifier circuits, logic circuits and relay drive circuits. It integrates overvoltage, overcurrent, short-circuit and thermal protection circuits. When the rear load circuit is shorted or abnormal, it will lock the output and send fault alarm signal to the interlock board to avoid cascading damage to other control cards. It is equipped with EMI filtering and surge absorption components to suppress grid noise and SCR commutation spike interference, improving the stability of the whole analog closed-loop control system. It is a dedicated auxiliary power accessory for Reliance legacy DC drive rack platform, cannot be directly replaced by other boards without matching output voltage specification, load current rating and wiring definition. Multiple power boards can be configured for independent power supply of multi-drive rack groups.

It adopts rack plug-in installation structure with gold-plated edge connector and front terminal blocks for AC input and multi-channel DC power output wiring. The PCB layout adopts reinforced heat dissipation and anti-vibration design, adapting to harsh industrial sites with large current switching noise and high ambient temperature. Users need to confirm matched drive series and total power consumption of downstream control boards before replacement. This legacy RELIANCE 5433914 board is mainly used for maintenance and retrofit of old Reliance DC drive systems. Output voltage accuracy test, full load stability test and protection function verification are required after installation. A conformal coated version is optional for high humidity and dusty industrial sites. This auxiliary power supply board is widely used in Reliance legacy DC drive renovation, centralized control power supply and stable operation of analog control loop.

This auxiliary power supply board obtains input power from the drive internal AC auxiliary winding. The edge connector and terminal block support quick disassembly and replacement for convenient on-site maintenance and inspection. The optimal operating temperature range is 0°C to 55°C, storage temperature ranges from -40°C to +85°C, relative humidity 5% to 85% non-condensing. It complies with industrial shock, vibration and EMC standards and has CE certifications. It supports parameter backup for fast recovery after hardware replacement.

This RELIANCE 5433914 auxiliary power supply board is widely applied in Reliance legacy DC drive control systems. It undertakes multi-channel isolated DC power conversion and fault protection for all internal control PCBs. As a reliable spare part for Reliance legacy drive systems, the 5433914 retains original voltage stabilization precision and load protection performance, helping customers reduce maintenance cost of old industrial automation equipment.