Product Details

The RELIANCE 5138116 regulator board is a discontinued analog closed-loop control PCB for Reliance Electric MinPak series DC drive units, widely used in metallurgy, papermaking, packaging and other light to medium duty industrial production lines. It serves as the core control card for MinPak DC drives, cooperating with power interface and feedback boards to complete speed loop and current loop PI regulation, output SCR firing angle commands, and realize stable speed and torque control of DC motors.

This board adopts operational amplifier analog regulation circuit design. It receives external speed reference signal and tachometer feedback signal, calculates deviation and adjusts speed loop output as current setpoint. It samples armature current signal to achieve current limiting, overload and stall protection. It integrates built-in ramp circuit for smooth acceleration and deceleration, fault latch and alarm logic. It can detect overcurrent, overspeed, field loss and power supply abnormal faults, lock fault state for maintenance troubleshooting. Multiple adjustable potentiometers are reserved on the board for loop gain, ramp time and current limit configuration. It is a dedicated regulator accessory for Reliance MinPak DC drive platform, cannot be directly replaced by other boards without matching the power stack, feedback sampling board, loop tuning and trigger phase calibration. Multiple regulator boards can be used for independent control of multiple MinPak drive units.

It adopts rack plug-in installation structure with gold-plated edge connector and front terminal blocks for reference signal, tachometer feedback and interlock wiring. The PCB layout adopts anti-interference and surge suppression design, adapting to industrial sites with SCR commutation noise and mechanical vibration. Users need to confirm matched MinPak drive model, power rating and wiring diagram before replacement. This legacy RELIANCE 5138116 board is mainly used for maintenance and retrofit of old Reliance MinPak DC drive systems. Closed-loop step response test, current limit calibration and protection function verification are required after installation. A conformal coated version is optional for high humidity and dusty industrial sites. This regulator board is widely used in Reliance MinPak drive renovation, analog double closed-loop speed regulation and constant torque control systems.

This regulator board obtains working power from the drive internal auxiliary power supply. 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 5138116 regulator board is widely applied in Reliance MinPak DC drive control systems. It undertakes analog speed and current double closed-loop regulation and fault logic processing. As a reliable spare part for Reliance legacy drive systems, the 5138116 retains original closed-loop control and protection performance, helping customers reduce maintenance cost of old industrial automation equipment.