diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-basic-config/modbus-basic-config.component.ts b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-basic-config/modbus-basic-config.component.ts
index 8291558b4d..3ed0ebf124 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-basic-config/modbus-basic-config.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-basic-config/modbus-basic-config.component.ts
@@ -22,6 +22,7 @@ import {
   FormGroup,
   NG_VALIDATORS,
   NG_VALUE_ACCESSOR,
+  UntypedFormControl,
   ValidationErrors,
   Validator,
 } from '@angular/forms';
@@ -121,10 +122,15 @@ export class ModbusBasicConfigComponent implements ControlValueAccessor, Validat
     this.enableSlaveControl.setValue(!!basicConfig.slave && !isEqual(basicConfig.slave, {}));
   }
 
-  validate(): ValidationErrors | null {
-    return this.basicFormGroup.valid ? null : {
-      basicFormGroup: {valid: false}
-    };
+  validate(basicFormControl: UntypedFormControl): ValidationErrors | null {
+    const { master, slave } = basicFormControl.value;
+    const isEmpty = !master?.slaves?.length && (isEqual(slave, {}) || !slave);
+    if (!this.basicFormGroup.valid || isEmpty) {
+      return {
+        basicFormGroup: {valid: false}
+      };
+    }
+    return null;
   }
 
   private updateSlaveEnabling(isEnabled: boolean): void {
diff --git a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-master-table/modbus-master-table.component.ts b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-master-table/modbus-master-table.component.ts
index 5f51f59284..75fc62ed5e 100644
--- a/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-master-table/modbus-master-table.component.ts
+++ b/ui-ngx/src/app/modules/home/components/widget/lib/gateway/connectors-configuration/modbus/modbus-master-table/modbus-master-table.component.ts
@@ -34,12 +34,8 @@ import {
   ControlValueAccessor,
   FormArray,
   FormBuilder,
-  NG_VALIDATORS,
   NG_VALUE_ACCESSOR,
-  UntypedFormControl,
   UntypedFormGroup,
-  ValidationErrors,
-  Validator,
 } from '@angular/forms';
 import {
   ModbusMasterConfig,
@@ -63,16 +59,11 @@ import { TbTableDatasource } from '@shared/components/table/table-datasource.abs
       useExisting: forwardRef(() => ModbusMasterTableComponent),
       multi: true
     },
-    {
-      provide: NG_VALIDATORS,
-      useExisting: forwardRef(() => ModbusMasterTableComponent),
-      multi: true
-    }
   ],
   standalone: true,
   imports: [CommonModule, SharedModule]
 })
-export class ModbusMasterTableComponent implements ControlValueAccessor, Validator, AfterViewInit, OnInit, OnDestroy {
+export class ModbusMasterTableComponent implements ControlValueAccessor, AfterViewInit, OnInit, OnDestroy {
 
   @ViewChild('searchInput') searchInputField: ElementRef;
 
@@ -139,12 +130,6 @@ export class ModbusMasterTableComponent implements ControlValueAccessor, Validat
     this.pushDataAsFormArrays(master.slaves);
   }
 
-  validate(masterControl: UntypedFormControl): ValidationErrors | null {
-    return masterControl.parent.get('slave').enabled || this.slaves.controls.length ? null : {
-      slavesFormGroup: {valid: false}
-    };
-  }
-
   enterFilterMode(): void {
     this.textSearchMode = true;
     this.cdr.detectChanges();