Electrical System (B Model and Newer Beds)
Chapter 3: Theory of Operation
Page 3 - 14 CareAssist® and CareAssist® ES Bed Service Manual (MAN330 REV 4)
The battery charge level is controlled. In this way, a flashing indicator and an
audible low battery alarm by buzzer are activated during movement if the
battery voltage drops (this is a continuous beep of several seconds that is heard
each time a control is pressed).
After connecting to the power outlet, the indicator continues to flash until the
battery has charged.
Battery operation is automatically stopped 30 seconds after the end of the last
movement.
Battery Characteristics
Table 3-9. Battery Backup Characteristics
The batteries are sealed lead acid, connected in series, and protected by a 10 A
fuse on the connection wires.
The battery type has no memory effect and can be charged regularly without
any particular constraints.
The capacity of the battery backup after full charging is at least three raise and
lower cycles for hilow, head section, knee section and foot section with the
maximum safe working load 400 lb (182 kg) on the bed.
Control Logic and Specific Functions
Combined activations of the motor provide the following functions:
• Dining Chair® Position
• Automatic contour
• Trendelenburg and Reverse Trendelenburg function
Lockout management
Description Specification
Components two 12 V, 1.2 Ah batteries
Voltage 24 V DC
Maximum charging time 12 hours
Discharging time (storage), battery
connected to bed
Minimum 10 days
Discharging time (storage), battery not
connected to bed
3 months
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