Eaton Vickers manufactures each fluid amplifier card in the EEA-LIM-454-A-10 series. These units have a variety of benefits over other products produced by competing manufacturers. For example, A-10 cards have two voltage followers, a complete LED front panel with indicator points, and 8 testing points. Two limit comparator devices are found within the each unit. They function as both an inverter and non-inverter. Negative and positive threshold switches have locations for test points. These are easily accessible, making configuration of A-10 cards very easy. These cards have a relay and logic supply voltage amounting to 24V, making them low-risk units to test and turn on.