Measurement Computing StrainBook/616 - Manual (Page 106)

Channel Expansion
Using WBK16 Modules with StrainBook
This section is concerned with how to connect up to seven WBK16 modules to a StrainBook/616 and how
to power the units.
Reference Note:
WBK module functions and specifications are discussed in the WBK Option Cards and
Modules User’s Manual
, p/n 489-0902. A PDF version of the document is included on your
data acquisition CD.
Power requirements can vary greatly from one 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 WBK16 module, connections must be made for power, expansion control, and expansion
signals.
The relevant WBK16 connectors [located on the WBK16 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 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.
The relevant StrainBook connectors [located on the StrainBook/616 rear panel] are:
• POWER IN [DIN5] connects to a 10 to 30 VDC source. Typically uses a TR-40U power
supply.
• ETHERNET connects to a PC’s 10/100BaseT Ethernet port, or to a 10/100BaseT Ethernet
network.
• EXPANSION CONTROL [HD15] provides a means of connecting up to seven WBK16
modules (or other modules, as applicable to your system), via the daisy-chain method.
• EXPANSION SIGNAL IN [BNC] connects to a WBK16’s EXPANSION SIGNAL OUT.
Prior to connecting your devices to power, calculate your system’s power requirements as
discussed in upcoming section of this chapter.
10-2 System Expansion 968594 StrainBook/616 User’s Manual