Watlow CLS200 - Manual (Page 25)

CLS200 Series User’s Guide Chapter 1: System Overview
Doc.# 0600-3050-2000 Watlow Anafaze 9
CLS200 Cabling
Watlow Anafaze provides cables required to install your
CLS200. A 50-pin SCSI cable connects the TB50 to the
CLS200.
The optional cable used to connect the CLS200 to a comput-
er using EIA/TIA-232 communications has a DB9 or DB25
connector for the computer and bare wires for connecting to
the CLS200.
Safety
Watlow Anafaze has made every effort to ensure the reli-
ability and safety of this product. In addition, we have pro-
vided recommendations that will allow you to safely install
and maintain this controller.
External Safety Devices
The CLS200 controller may fail full-on (100% output pow-
er) or full-off (0% output power), or may remain full-on if an
undetected sensor failure occurs. For more information
about failed sensor alarms, see Failed Sensor Alarms on
page 65.
Design your system to be safe even if the controller sends a
0% or 100% output power signal at any time. Install inde-
pendent, external safety devices that will shut down the
system if a failure occurs.
Typically, a shutdown device consists of an FM-approved
high/low process limit controller that operates a shutdown
device such as an mechanical contactor. The limit control-
ler monitors for a hazardous condition such as an under-
temperature or over-temperature fault. If a hazardous con-
dition is detected, the limit controller sends a signal to open
the contactor.
The safety shutdown device (limit controller and contactor)
must be independent from the process control equipment.
WARNING! The controller may fail in a 0% or 100% power
output state. To prevent death, personal inju-
ry, equipment damage or property damage,
install external safety shutdown devices. If
death or injury may occur, you must install
FM-approved safety shutdown devices that
operate independently from the process con-
trol equipment.
With proper approval and installation, thermal fuses may
be used in some processes.