Measurement Computing WaveBook rev.5.3 - Manual (Page 44)

Power requirements can vary greatly from one WaveBook system to another, and will need to be calculated
on a system by system basis, before power is applied to the system. This chapter includes instructions for
calculating power requirements.
Before discussing how to calculate power, we will look at the use of connectors and the types of cables
used.
Connectors and Cables
To attach a module, connections must be made for power, expansion control, and expansion signals.
The relevant connectors [located on the WBK Modules] are as follows:
•
POWER IN – DIN5, connects to a 10 to 30 VDC source. When in a power daisy-chain,
POWER IN connects to the previous WaveBook or WBK module’s POWER OUT.
• POWER OUT – DIN5, can be connected to the next module’s POWER IN, providing the
5 amp current limit will not be exceeded. It may be necessary to use a supplemental power
supply. Power requirements and discussed in the following pages.
•
EXPANSION CONTROL OUT – HD15, connects to the next module’s EXPANSION
CONTROL IN.
• EXPANSION SIGNAL IN – BNC, connects to the next module’s EXPANSION SIGNAL OUT.
• Additional Connectors on WBK25 Ethernet Module Only:
- ETHERNET – Connects to a PC’s 10/100BaseT Ethernet port, or to a
10/100BaseT Ethernet network.
- EXPANSION PORT (1, 2, & 3) – DB25, provides a means of connecting up to
three WaveBook or WBK40 Series devices.
Prior to connecting your devices to power, calculate your system’s power requirements as
discussed in upcoming section of this chapter. Note that examples of system setups follow
shortly.
CE Compliance
If your WaveBook system needs to be CE Compliant refer to the Declaration of
Conformity for each system component. Also, refer to Chapter 6, CE Compliance
and Noise Considerations.
Associated Cables
CA-35-12 (1 foot), CA-35-2 (2 foot), and CA-35-6 (6 foot) DB25 Male to DB25 Female Parallel
Cables. These cables are used to connect the parallel port of one device to that of another. They
are typically used to connect a WaveBook’s “TO COMPUTER” port (PARALLEL PORT) to the
EPP connector of the host PC.
CA-115 Power Cables. CA-115 cables are 6 inches long and have two 5-pin male DIN
connectors. CA-115s are frequently used to link WaveBook’s POWER OUT connector to a WBK
expansion module’s POWER IN connector. CA-115 cables are also used to link an expansion
module’s POWER OUT connector to the next daisy-chained module’s POWER IN connector.
CA-115 cables and the device DIN5 connectors (see following figure) are limited to 5 amps
at 15 VDC.
3 Return
+10 to +30 V 4
+10 to +30 V 1
2
Return
5 No connection
DIN 5 Power Pinout*
Power is supplied to WaveBook modules via a DIN5
type connector located on the rear panel of the
device.
*The DIN5 pinout [to the left] is based on an external
view of a WaveBook rear panel.
2-24 System Setup and Power Options 979194 WaveBook User’s Manual