6.5.5 Electric Actuator System
The electric actuator system for a hospital bed may consist of the following components:
x An actuator / EM1: for the backrest
x Two actuators /EM2: for the backrest and mattress base
x Three actuators / EM3: for the backrest, mattress base height and thigh rest
x A handset with/without integrated multiple locking function for the patient to adjust the bed with
x Central control unit under the mattress base. The control unit there uses a transformer to gen-
erate a 24-volt protective low voltage which is non-hazardous for patients and users. The actu-
ators, the handset and the locking box are connected to the control unit. These components
operate on 24-volt protective low voltage and have dust and water protected plug connections.
x Lead-acid batteries (optional for beds with EM2 and EM3) for mains-independent emergency
operation
x Locking box (optional for beds with EM2 and EM3). A handset without a locking function is
supplied for this purpose. The user can lock the handset as necessary and activate CPR func-
tions using the locking box.
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