Watlow Series D8 - Manual (Page 26)

Chapter 1: System Overview Series D8 User’s Guide
8 Watlow Anafaze Doc. 0600-3120-2000
TB50
The TB50 is a screw-terminal interface for control wiring. It
allows you to connect power controllers and other discrete I/O
devices to the D8. The screw terminal blocks accept wires as
large as 18 AWG (0.75 mm 2 ). A 50-pin SCSI cable connects
the TB50 to the D8.
Figure 1.5 TB50
D8 Cabling
Watlow Anafaze provides cables required to install the D8. A
50-pin SCSI cable connects the TB50 to the D8.
Safety
Watlow Anafaze has made every effort to ensure the reliabil-
ity and safety of this product. In addition, we have provided
recommendations that will allow you to safely install and
maintain this controller.
External Safety Devices
The D8 controller may fail full-on (100 percent output power)
or full-off (0 percent output power), or may remain full-on if
an undetected sensor failure occurs.
Design your system to be safe even if the controller sends a 0
percent or 100 percent output power signal at any time . Install
independent, external safety devices such as the Watlow
Anafaze TLM-8 that will shut down the system if a failure oc-
curs.
Typically, a shutdown device consists of an agency-approved
high/low process limit controller that operates a shutdown de-