Electrical System (B Model and Newer Beds)
Chapter 3: Theory of Operation
Page 3 - 12 CareAssist® and CareAssist® ES Bed Service Manual (MAN330 REV 4)
Power Supply Unit Characteristics
Table 3-7. Power Supply Unit Characteristics
Table 3-8. Maximum Power Load
The power supply unit is composed of the following components:
• Power stage
• Functions controlled by relays and transistors
• Battery charging circuit
• Control logic and specific functions
The functions may be locked out using the caregiver controls. When they are
not locked out, they be used by one of the following:
• Patient pendant
• Caregiver controls
Description Specification
Input characteristics (see table 3-6 on page 3-11)
Fuse rating on primary 5.0/2.5 A time delay
Output voltage 18 to 40 V AC rectified,
filtered
Voltage
Input Power
(Peak)
Input Power
(Idle)
100 580 VA 60
110 550 VA 55
115 580 VA 55
120 670 VA 55
127 630 VA 60
220 680 VA 70
230 630 VA 70
240 590 VA 70
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