diff --git a/S7.Net/PLCHelpers.cs b/S7.Net/PLCHelpers.cs
index b701863..1668e08 100644
--- a/S7.Net/PLCHelpers.cs
+++ b/S7.Net/PLCHelpers.cs
@@ -1,4 +1,5 @@
 using S7.Net.Helper;
+using S7.Net.Protocol.S7;
 using S7.Net.Types;
 using System;
 using System.Collections.Generic;
@@ -243,7 +244,7 @@ namespace S7.Net
             }
         }
 
-        private static byte[] BuildReadRequestPackage(IList<DataRequestItem> dataItems)
+        private static byte[] BuildReadRequestPackage(IList<DataItemAddress> dataItems)
         {
             int packageSize = 19 + (dataItems.Count * 12);
             var package = new System.IO.MemoryStream(packageSize);
diff --git a/S7.Net/PlcAsynchronous.cs b/S7.Net/PlcAsynchronous.cs
index 9bd57de..b6b49c6 100644
--- a/S7.Net/PlcAsynchronous.cs
+++ b/S7.Net/PlcAsynchronous.cs
@@ -7,6 +7,7 @@ using System.Threading.Tasks;
 using S7.Net.Protocol;
 using System.IO;
 using System.Threading;
+using S7.Net.Protocol.S7;
 
 namespace S7.Net
 {
@@ -262,7 +263,7 @@ namespace S7.Net
 
             try
             {
-                var dataToSend = BuildReadRequestPackage(dataItems.Select(d=> new DataRequestItem(d)).ToList());
+                var dataToSend = BuildReadRequestPackage(dataItems.Select(d => DataItem.GetDataItemAddress(d)).ToList());
                 await stream.WriteAsync(dataToSend, 0, dataToSend.Length);
 
                 var s7data = await COTP.TSDU.ReadAsync(stream, cancellationToken);
@@ -435,7 +436,7 @@ namespace S7.Net
         {
             var stream = GetStreamIfAvailable();
 
-            var dataToSend = BuildReadRequestPackage(new [] { new DataRequestItem(dataType, db, startByteAdr, count)});
+            var dataToSend = BuildReadRequestPackage(new [] { new DataItemAddress(dataType, db, startByteAdr, count)});
             await stream.WriteAsync(dataToSend, 0, dataToSend.Length, cancellationToken);
 
             var s7data = await COTP.TSDU.ReadAsync(stream, cancellationToken);
diff --git a/S7.Net/DataRequestItem.cs b/S7.Net/Protocol/S7/DataItemAddress.cs
similarity index 69%
rename from S7.Net/DataRequestItem.cs
rename to S7.Net/Protocol/S7/DataItemAddress.cs
index 6b27c85..cf37382 100644
--- a/S7.Net/DataRequestItem.cs
+++ b/S7.Net/Protocol/S7/DataItemAddress.cs
@@ -1,11 +1,11 @@
-
-using S7.Net.Types;
-
-namespace S7.Net
+namespace S7.Net.Protocol.S7
 {
-    internal class DataRequestItem
+    /// <summary>
+    /// Represents an area of memory in the PLC
+    /// </summary>
+    internal class DataItemAddress
     {
-        public DataRequestItem(DataType dataType, int db, int startByteAddress, int byteLength)
+        public DataItemAddress(DataType dataType, int db, int startByteAddress, int byteLength)
         {
             DataType = dataType;
             DB = db;
@@ -13,11 +13,6 @@ namespace S7.Net
             ByteLength = byteLength;
         }
 
-        public DataRequestItem(DataItem dataItem)
-            : this(dataItem.DataType, dataItem.DB, dataItem.StartByteAdr, Plc.VarTypeToByteLength(dataItem.VarType, dataItem.Count))
-        {
-
-        }
 
         /// <summary>
         /// Memory area to read 
diff --git a/S7.Net/Types/DataItem.cs b/S7.Net/Types/DataItem.cs
index c944ffa..254eab3 100644
--- a/S7.Net/Types/DataItem.cs
+++ b/S7.Net/Types/DataItem.cs
@@ -1,4 +1,5 @@
-using System;
+using S7.Net.Protocol.S7;
+using System;
 
 namespace S7.Net.Types
 {
@@ -94,5 +95,10 @@ namespace S7.Net.Types
 
             return dataItem;
         }
+
+        internal static DataItemAddress GetDataItemAddress(DataItem dataItem)
+        {
+            return new DataItemAddress(dataItem.DataType, dataItem.DB, dataItem.StartByteAdr, Plc.VarTypeToByteLength(dataItem.VarType, dataItem.Count));
+        }
     }
 }