diff --git a/src/ophyd_async/epics/areadetector/drivers/ad_base.py b/src/ophyd_async/epics/areadetector/drivers/ad_base.py
index b42a45f66b..6e768a93d3 100644
--- a/src/ophyd_async/epics/areadetector/drivers/ad_base.py
+++ b/src/ophyd_async/epics/areadetector/drivers/ad_base.py
@@ -43,16 +43,12 @@ class DetectorState(str, Enum):
 class ADBase(NDArrayBase):
     def __init__(self, prefix: str, name: str = "") -> None:
         # Define some signals
-        self.acquire = ad_rw(bool, prefix + "Acquire")
         self.acquire_time = ad_rw(float, prefix + "AcquireTime")
         self.num_images = ad_rw(int, prefix + "NumImages")
         self.image_mode = ad_rw(ImageMode, prefix + "ImageMode")
-        self.array_counter = ad_rw(int, prefix + "ArrayCounter")
-        self.array_size_x = ad_r(int, prefix + "ArraySizeX")
-        self.array_size_y = ad_r(int, prefix + "ArraySizeY")
         self.detector_state = ad_r(DetectorState, prefix + "DetectorState")
         # There is no _RBV for this one
-        self.wait_for_plugins = epics_signal_rw(bool, prefix + "WaitForPlugins")
+        
         super().__init__(prefix, name=name)
 
 
diff --git a/src/ophyd_async/epics/areadetector/writers/nd_file_hdf.py b/src/ophyd_async/epics/areadetector/writers/nd_file_hdf.py
index 9689bc4678..5bc3360e79 100644
--- a/src/ophyd_async/epics/areadetector/writers/nd_file_hdf.py
+++ b/src/ophyd_async/epics/areadetector/writers/nd_file_hdf.py
@@ -34,7 +34,5 @@ def __init__(self, prefix: str, name="") -> None:
         self.lazy_open = ad_rw(bool, prefix + "LazyOpen")
         self.capture = ad_rw(bool, prefix + "Capture")
         self.flush_now = epics_signal_rw(bool, prefix + "FlushNow")
-        self.array_size0 = ad_r(int, prefix + "ArraySize0")
-        self.array_size1 = ad_r(int, prefix + "ArraySize1")
         self.xml_file_name = ad_rw(str, prefix + "XMLFileName")
         super().__init__(prefix, name)
diff --git a/src/ophyd_async/epics/areadetector/writers/nd_plugin.py b/src/ophyd_async/epics/areadetector/writers/nd_plugin.py
index 815c2a8e0d..5c56f040b6 100644
--- a/src/ophyd_async/epics/areadetector/writers/nd_plugin.py
+++ b/src/ophyd_async/epics/areadetector/writers/nd_plugin.py
@@ -15,6 +15,11 @@ class NDArrayBase(Device):
     def __init__(self, prefix: str, name: str = "") -> None:
         self.unique_id = ad_r(int, prefix + "UniqueId")
         self.nd_attributes_file = epics_signal_rw(str, prefix + "NDAttributesFile")
+        self.acquire = ad_rw(bool, prefix + "Acquire")
+        self.wait_for_plugins = epics_signal_rw(bool, prefix + "WaitForPlugins")
+        self.array_size_x = ad_r(int, prefix + "ArraySizeX")
+        self.array_size_y = ad_r(int, prefix + "ArraySizeY")
+        self.array_counter = ad_rw(int, prefix + "ArrayCounter")
         super().__init__(name)
 
 
@@ -23,6 +28,8 @@ def __init__(self, prefix: str, name: str = "") -> None:
         self.nd_array_port = ad_rw(str, prefix + "NDArrayPort")
         self.enable_callback = ad_rw(Callback, prefix + "EnableCallbacks")
         self.nd_array_address = ad_rw(int, prefix + "NDArrayAddress")
+        self.array_size0 = ad_r(int, prefix + "ArraySize0")
+        self.array_size1 = ad_r(int, prefix + "ArraySize1")
         super().__init__(prefix, name)