diff --git a/src/dodal/devices/electron_analyser/base/base_driver_io.py b/src/dodal/devices/electron_analyser/base/base_driver_io.py
index b266709aa8..8bc55e7ddf 100644
--- a/src/dodal/devices/electron_analyser/base/base_driver_io.py
+++ b/src/dodal/devices/electron_analyser/base/base_driver_io.py
@@ -33,6 +33,8 @@
 AnyPsuMode: TypeAlias = SupersetEnum | StrictEnum
 TPsuMode = TypeVar("TPsuMode", bound=AnyPsuMode)
 
+_PSU = "PSU_MODE"
+
 
 class AbstractAnalyserDriverIO(
     ABC,
@@ -56,8 +58,7 @@ class AbstractAnalyserDriverIO(
         pass_energy_type (type[TPassEnergy]): Can be enum or float, depending on
             electron analyser model. If enum, it determines the available pass
             energies for this device.
-        energy_source: Device that can give us the correct excitation energy (in eV)
-            and switch sources if applicable.
+        psu_suffix (str, optional): The psu infix to connect to EPICS. Defaults to PSU_MODE.
         name (str, optional): Name of the device.
     """
 
@@ -68,6 +69,7 @@ def __init__(
         lens_mode_type: type[TLensMode],
         psu_mode_type: type[TPsuMode],
         pass_energy_type: type[TPassEnergy],
+        psu_suffix: str = _PSU,
         name: str = "",
     ) -> None:
         self.acquisition_mode_type = acquisition_mode_type
@@ -108,7 +110,7 @@ def __init__(
             )
             # This is used by each electron analyser, however it depends on the electron
             # analyser type to know if is moved with region settings.
-            self.psu_mode = epics_signal_rw(psu_mode_type, prefix + "PSU_MODE")
+            self.psu_mode = epics_signal_rw(psu_mode_type, prefix + psu_suffix)
 
         # This is defined in the parent class, add it as readable configuration.
         self.add_readables([self.acquire_time], StandardReadableFormat.CONFIG_SIGNAL)
diff --git a/src/dodal/devices/electron_analyser/specs/specs_driver_io.py b/src/dodal/devices/electron_analyser/specs/specs_driver_io.py
index 7c16a39983..6911cf6535 100644
--- a/src/dodal/devices/electron_analyser/specs/specs_driver_io.py
+++ b/src/dodal/devices/electron_analyser/specs/specs_driver_io.py
@@ -12,6 +12,7 @@
 from ophyd_async.epics.core import epics_signal_r, epics_signal_rw
 
 from dodal.devices.electron_analyser.base.base_driver_io import (
+    _PSU,
     AbstractAnalyserDriverIO,
 )
 from dodal.devices.electron_analyser.base.base_region import TLensMode, TPsuMode
@@ -34,6 +35,7 @@ def __init__(
         prefix: str,
         lens_mode_type: type[TLensMode],
         psu_mode_type: type[TPsuMode],
+        psu_suffix: str = _PSU,
         name: str = "",
     ) -> None:
         with self.add_children_as_readables(StandardReadableFormat.CONFIG_SIGNAL):
@@ -55,6 +57,7 @@ def __init__(
             lens_mode_type=lens_mode_type,
             psu_mode_type=psu_mode_type,
             pass_energy_type=float,
+            psu_suffix=psu_suffix,
             name=name,
         )
 
diff --git a/src/dodal/devices/electron_analyser/vgscienta/vgscienta_driver_io.py b/src/dodal/devices/electron_analyser/vgscienta/vgscienta_driver_io.py
index 3d7db84aa9..4756baec46 100644
--- a/src/dodal/devices/electron_analyser/vgscienta/vgscienta_driver_io.py
+++ b/src/dodal/devices/electron_analyser/vgscienta/vgscienta_driver_io.py
@@ -40,6 +40,7 @@ def __init__(
         lens_mode_type: type[TLensMode],
         psu_mode_type: type[TPsuMode],
         pass_energy_type: type[TPassEnergyEnum],
+        psu_suffix: str = "ELEMENT_SET",
         name: str = "",
     ) -> None:
         with self.add_children_as_readables(StandardReadableFormat.CONFIG_SIGNAL):
@@ -55,12 +56,13 @@ def __init__(
             self.sensor_max_size_y = epics_signal_r(int, prefix + "MaxSizeY_RBV")
 
         super().__init__(
-            prefix,
-            AcquisitionMode,
-            lens_mode_type,
-            psu_mode_type,
-            pass_energy_type,
-            name,
+            prefix=prefix,
+            acquisition_mode_type=AcquisitionMode,
+            lens_mode_type=lens_mode_type,
+            psu_mode_type=psu_mode_type,
+            pass_energy_type=pass_energy_type,
+            psu_suffix=psu_suffix,
+            name=name,
         )
 
     @AsyncStatus.wrap