diff --git a/MECF.Framework.Common/Aitex/Core/RT/Device/BaseDevice.cs b/MECF.Framework.Common/Aitex/Core/RT/Device/BaseDevice.cs
index 744f58b..a407a18 100644
--- a/MECF.Framework.Common/Aitex/Core/RT/Device/BaseDevice.cs
+++ b/MECF.Framework.Common/Aitex/Core/RT/Device/BaseDevice.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.ComponentModel;
 using System.Linq;
 using System.Xml;
 using Aitex.Core.RT.Event;
@@ -162,6 +163,66 @@ namespace Aitex.Core.RT.Device
 
         #region Methods
 
+        /// <summary>
+        /// 加载指定的系统配置。
+        /// </summary>
+        /// <param name="scPath">指定的系统配置路径</param>
+        /// <param name="scPathFallback">当指定的系统配置路径不存在时，使用默认路径</param>
+        /// <param name="valueFallback">当指定的系统配置值数据类型错误时，使用此默认值</param>
+        /// <param name="valueHolder">存放系统配置的变量</param>
+        /// <param name="scValueChangedCallback">监测系统配置是否发生变化，当发生变化时，执行此回调函数</param>
+        /// <typeparam name="T"></typeparam>
+        protected void LoadSC<T>(string scPath, string scPathFallback, T valueFallback, ref T valueHolder, Action<T> scValueChangedCallback = null)
+        {
+            if (scPath == null) throw new ArgumentNullException(nameof(scPath));
+            if (scPathFallback == null) throw new ArgumentNullException(nameof(scPathFallback));
+            if (valueFallback == null) throw new ArgumentNullException(nameof(valueFallback));
+            if (valueHolder == null) throw new ArgumentNullException(nameof(valueHolder));
+
+            // 读取系统配置
+            var path = scPath;
+            var scItem = SC.GetConfigItem(path);
+            if (scItem == null)
+            {
+                // 没找到配置，用默认路径找
+                path = scPathFallback;
+                scItem = SC.GetConfigItem(path);
+            }
+
+            if (scItem != null)
+            {
+                // 找到系统配置，尝试转换并赋值到指定的字段
+                try
+                {
+                    var converter = TypeDescriptor.GetConverter(typeof(T));
+                    valueHolder = (T)converter.ConvertFromString(scItem.Value.ToString());
+
+                    // 如果指定了该回调，则表明需要监测当前系统配置值
+                    if (scValueChangedCallback != null)
+                    {
+                        SC.RegisterValueChangedCallback(path, v =>
+                        {
+                            var val = (T)converter.ConvertFromString(scItem.Value.ToString());
+                            scValueChangedCallback(val);
+                        });
+                    }
+                }
+                catch (Exception)
+                {
+                    EV.PostWarningLog(Module,
+                        $"System config {path} type mismatched, set to default value");
+                    valueHolder = valueFallback;
+                }
+            }
+            else
+            {
+                // 指定路径和默认路径均找不到配置，使用默认配置
+                EV.PostWarningLog(Module,
+                    $"System config {path} type mismatched, set to default value");
+                valueHolder = valueFallback;
+            }
+        }
+
         /// <summary>
         /// 订阅报警事件。
         /// </summary>
diff --git a/MECF.Framework.RT.EquipmentLibrary/Devices/IoPSU.cs b/MECF.Framework.RT.EquipmentLibrary/Devices/IoPSU.cs
index e9a3009..b387f07 100644
--- a/MECF.Framework.RT.EquipmentLibrary/Devices/IoPSU.cs
+++ b/MECF.Framework.RT.EquipmentLibrary/Devices/IoPSU.cs
@@ -167,32 +167,10 @@ namespace Aitex.Core.RT.Device.Devices
         /// </summary>
         private void LoadConfig()
         {
-            // 读取系统配置中电阻最大值定义；
-            // 如果DeviceModel配置中指定的系统配置节点找不到，则用默认的路径找配置；
-            // 如果还找不到，则默认为3欧姆。
-            var scResLimitMax = $"{ScBasePath}.{_scResLimitMax}";
-            var sc = SC.GetConfigItem(scResLimitMax);
-            if (sc != null)
-                _resLimitMax = (float)sc.Value;
-            else
-            {
-                scResLimitMax = $"PM.{Module}.Heater.{Name}ResistanceLimitMax";
-                sc = SC.GetConfigItem(scResLimitMax);
-                if (sc != null)
-                    _resLimitMax = (float)sc.Value;
-                else
-                {
-                    _resLimitMax = 3;
-                    EV.PostWarningLog(Module,
-                        $"Unable to find {Name} ResistanceMax config, set to {_resLimitMax} as the default value");
-                }
-            }
+            const float DEF_RES_LIMIT_MAX_OHM = 3;
 
-            // 监测系统配置变化。
-            SC.RegisterValueChangedCallback(scResLimitMax, v =>
-            {
-                _resLimitMax = (float)v;
-            });
+            LoadSC($"{ScBasePath}.{_scResLimitMax}", $"PM.{Module}.Heater.{Name}ResistanceLimitMax",
+                DEF_RES_LIMIT_MAX_OHM, ref _resLimitMax, f => { _resLimitMax = f; });
         }
 
         public bool Initialize()