Symbol MiniScan MS-120X, Руководство по интеграции

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4-5
MS-120XFZY Specifications
• Frequent scanner resets
• Scanner occasionally loses power (due to host initiated shutdown)
• Occasional host lockups.
Because multi-interface Miniscan Plus products are often exposed to these environments
due to the nature of scanner placement, they have been safeguarded as much as possible
to prevent physical damage. Despite design precautions, testing has shown that some USB
hosts cannot tolerate these environments. In this case, try placing a self-powered USB hub
close to the host, between the scanner and host, as a buffer to the host against the harsh
environment. This may not be a valid solution in all cases.
Technical Specifications
Table 4-3 provides the MS-120XFZY technical specifications.
Table 4-3. MS-120XFZY Technical Specifications @ 23°C
Item Description
Power Requirements
Input Voltage
Scanning Current
Standby Current
MS-1204FZY
MS-1207FZY
V
cc
Noise Level
5.0 VDC ±10%
160 mA ±40 mA
20 mA ±5 mA typical
40 mA ±5 mA typical
200 mV peak-to-peak max.
Laser Power 1.0 mW ± 0.12 mW,
λ
= 650 nm nominal
Scan Rate 36 (± 5) scans/sec (bidirectional)
Print Contrast Minimum 25% absolute dark/light reflectance measured at 650
nm.
Scan Angle Default: 42° ± 2°
Narrow: 30° ± 2°
Skew Tolerance ± 50° from normal (see Figure 4-3 on page 4-7 )
Pitch Angle ± 65° from normal (see Figure 4-3 on page 4-7 )
Roll ± 20° from vertical (see Figure 4-3 on page 4-7 )
Decode Depth of Field See Figure 4-4 on page 4-8
Note: Environmental and/or tolerance parameters are not cumulative.