diff --git a/src/components/floor-plan/modal/circuitTrestle/CircuitTrestleSetting.jsx b/src/components/floor-plan/modal/circuitTrestle/CircuitTrestleSetting.jsx
index fe7b8e11..83d6f6c3 100644
--- a/src/components/floor-plan/modal/circuitTrestle/CircuitTrestleSetting.jsx
+++ b/src/components/floor-plan/modal/circuitTrestle/CircuitTrestleSetting.jsx
@@ -833,12 +833,9 @@ export default function CircuitTrestleSetting({ id }) {
             pcsItemId: item.itemId,
             pscOptCd: getPcsOptCd(index),
             paralQty: serQty.paralQty,
+            // 접속함 중복 체크: 동일 itemId는 1개만, 다르면 각각 올림
             connections: item.connList?.length
-              ? [
-                  {
-                    connItemId: item.connList[0].itemId,
-                  },
-                ]
+              ? [...new Map(item.connList.map((conn) => [conn.itemId, { connItemId: conn.itemId, connMaxParalCnt: conn.connMaxParalCnt }])).values()]
               : [],
           })
           // return {
diff --git a/src/components/floor-plan/modal/circuitTrestle/step/StepUp.jsx b/src/components/floor-plan/modal/circuitTrestle/step/StepUp.jsx
index 2fc0c38f..14f6aa03 100644
--- a/src/components/floor-plan/modal/circuitTrestle/step/StepUp.jsx
+++ b/src/components/floor-plan/modal/circuitTrestle/step/StepUp.jsx
@@ -223,7 +223,6 @@ export default function StepUp(props) {
         useModuleItemList: props.getUseModuleItemList(),
         pcsItemList: getSelectedPcsItemList(),
       }
-
       /** PCS 접속함 및 옵션 목록 조회 */
       getPcsConnOptionItemList(params).then((res) => {
         if (res?.result.code === 200 && res?.data) {
@@ -550,9 +549,10 @@ export default function StepUp(props) {
           pcsItemId: serQty.itemId,
           pcsOptCd: seletedOption,
           paralQty: serQty.paralQty,
-          connections: {
-            connItemId: item.connList[0].itemId,
-          },
+          // 접속함 중복 체크: 동일 itemId는 1개만, 다르면 각각 올림
+          connections: item.connList?.length
+            ? [...new Map(item.connList.map((conn) => [conn.itemId, { connItemId: conn.itemId, connMaxParalCnt: conn.connMaxParalCnt }])).values()]
+            : [],
         }
       })
     })