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Power Supply
Do not power up the EM50S until it is properly connected. Be sure the power is cut off before connecting a cable to or
disconnecting a cable from the host interface connector. Hot-plugging could damage the engine.
Unstable power supply or sharp voltage drops or unreasonably short interval between power-ons may lead to unstable
performance of the engine. Do not resupply the power immediately after cutting it off.
Ripple Noise
To ensure the image quality, a power supply with low ripple noise is needed.
Acceptable ripple range (peak-to-peak): ≤80mV
DC Characteristics
Operating Voltage / Current
Table 3-1
T=23° C
Parameter
Operating Voltage
Current (@3.3V)
Note:
*
The values of the current listed above are all RMS values. 900mA (PKPK) is the peak current draw when the engine is
scanning with the illumination set to Always On. To ensure the engine performance, it is imperative that the power supply
can provide a current over 1A (DC/DC is recommended while LDO is not.).
The user may put the engine into Sleep mode by sending the command 7E 00 00 09 7E 53 54 41 4E 44 42 59 7E A1 to it
through serial interface, USB HID Keyboard, USB CDC COM, or USB HID-POS. Auto sleep mode is also provided to allow
the engine to automatically enter the sleep mode if no operation or communication is performed for a time period. To awake
the engine from sleep mode, simply press the trigger.
19
Chapter 3 Electrical Specifications
Description
VIN
(12-pin FPC Connector)
Operating Current
Idle Current
Sleep Current
Minimum
Typical
3.135
3.3
-
269
-
60
Maximum
Unit
3.465
V
399
mA
70
mA
1
mA
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