Measurement Computing WaveBook rev.3.0 - Manual (Page 52)

3-20 WBK16, WBK Expansion Options, ch03B 6-23-99 WaveBook User’s Manual
Power
Like the WaveBook, WBK15 contains an internal power supply. The unit can be powered by the included
AC power adapter or any 10 to 30 VDC source, such as a 12 V car battery. For portable or field
applications, WBK15 and the WaveBook can be powered by the DBK30A rechargeable battery module or
DBK34 vehicle UPS module. The supply input is fully isolated from the measurement system. If the fuse
requires replacement, it is a 2 A fuse (Littelfuse #251002).
Prior to daisy-chaining from one module’s power connector to another (see page 3-3
for WBK10 example), be sure to compute power consumption for your entire system.
Some modules may need independent power adapters. Chapter 4 contains detailed
information regarding power supply issues.
Safety Concerns
WARNING WARNING WARNING WARNING
Shock Hazard! Voltages above 50 Vrms AC and voltages above 100 VDC are
considered hazardous. Safety precautions are required when 5B modules are used in
situations that require high-voltage isolation from the rest of the system. Failure to
practice electrical safety precautions could lead to injury or death.
WBK15 is specified for 1500 VDC isolation in a normal environment free from conductive pollutants and
condensation. The 1500 VDC rating requires a proper earth ground connection to the chassis and treatment
of adjacent inputs as potentially hazardous. CE-marked units used in the European community are rated at
600 VDC isolation. The 600 VDC CE isolation specification is based on a double insulation requirement,
and no earth ground is required.
Input cables must be rated for the isolation potential in use. Line voltage ratings are much lower than the
DC isolation values specified due to transients that occur on power lines. Never open the lid unless all
inputs with potentially hazardous voltages are removed. The lid must be securely screwed on during use.
It is strongly recommended that you:
• Properly tighten all chassis screws before system use.
• Properly tighten the screw that retains the 5B module.
• Never plug in or unplug potentially hazardous connections with power applied to any connected
equipment.
• Never attempt to change 5B modules or open the lid with power applied to the WBK15. You could
short out internally exposed circuits and cause personal injury or equipment damage.
• Never leave a foreign object inside the WBK15.
Reference Note:
Refer to chapter 4 for detailed information regarding power aspects of WaveBook systems.
Assembly
The WBK15 base dimension is the same as WaveBook’s. This allows for convenient stacking, since
horizontal and depth requirements remain unchanged. A fastener panel is used to stack the units. Screw-on
handles are available for portable applications. For detailed assembly information, see chapter 4:
System Power & Assembly.
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