WATLOWCAS200 User’s GuideSystem Overview

regulations require that you use independent external 

safety devices to prevent potentially dangerous or unsafe 

conditions. Assume that the CAS200 can fail or that other 

unexpected conditions can occur.

Install high or low temperature protection in systems 

where an overtemperature or undertemperature fault 

condition could present a fire hazard or other hazard. 

Failure to install temperature control protection where a 

potential hazard exists could result in damage to 

equipment and property, and injury to personnel.

For additional process safety, program a computer or other 

host device to automatically reload your desired operating 

parameters after a power failure. However, this safety 

feature does not eliminate the need for other external, 

independent safety devices in dangerous conditions.

The CAS200 should never be used as a safety 

shutdown device. It should only be used with 

other approved independent safety shutdown 

devices.

Contact Watlow Anafaze immediately if you have any 

questions about system safety or system operation.

This chapter describes how to install the CAS200 series 

scanner and its peripherals. Installation of the scanner 

involves the following procedures:

• Determining the best location for the scanner

• Mounting the scanner and TB50

• Power Connection

• Input Wiring

• Communications Wiring (EIA/TIA-232 or EIA/TIA485)

• Output Wiring

Typical Installation

The illustrations below show typical installations of the 

scanner with the TB50 terminal block. Observe the 

illustration below to determine potential space 

requirements.

We recommend that you read this entire chapter first 

before beginning the installation procedure. This will help 

you to carefully plan and assess the installation. 

Figure 2.1 System Components

Safety

∫

WARNING! Ensure that power has been shut off to your entire 

process before you begin installation of the 

scanner

Watlow Anafaze has made every effort to ensure the 

reliability and safety of this product. In addition, we have 

provided recommendations that will allow you to safely 

install and maintain this scanner. 

∫

WARNING! In any application, failures can occur. These 

failures can result in full control output (100% 

power), or the occurrence of other output failures 

which can cause damage to the scanner, or to the 

equipment or process connected to the scanner. 

Therefore, always follow good engineering 

practices, electrical codes, and insurance 

regulations when installing and operating this 

equipment. 

 External Safety Devices

External safety devices should be used to prevent 

potentially dangerous and unsafe conditions upon 

equipment failure. Always assume that this device can fail 

with outputs full-On, or full-Off, by the occurrence of an 

unexpected external condition.

∫

WARNING! Always install high or low temperature protection 

in installations where an overtemperature or 

undertemperature fault will present a potential 

hazard. Failure to install external protection 

devices where hazards exist can result in damage 

to equipment, property, or human life.

Mounting 

We recommend you mount the scanner in a panel not more 

than 0.2 inches thick. 

∫

WARNING! To reduce the risk of fire or electric shock, install 

the CAS200 in a controlled environment, 

relatively free of contaminants.

 Location

Install the scanner in a location free from excessive (>50°C) 

heat, dust, and unauthorized handling. 

Ensure there is enough clearance for mounting brackets, 

terminal blocks, and cable and wire connections; the 

scanner extends 7.0 in. behind the panel face and the screw 

brackets extend 0.5 in. above and below it. Allow an 

additional 1 to 3 inches for the SCSI cable.

Figure 2.2 Clearance Recommendations

Other Tools: 

You will also need these tools:

• Phillips head screwdriver

• Flathead screwdriver for wiring

• Multimeter

 Mounting the Scanner

Mount the scanner before you mount the TB50 or do any 

wiring. The scanner's placement affects placement and 

wiring considerations for the other components of your 

system.

You receive one of two types of mounting brackets with 

your scanner, the mini-bracket or the collar bracket. Refer 

to the corresponding sections below for instructions.

 Steps Using the Mini-Bracket

1. Cut a hole in the panel to the dimensions shown in the 

illustration below. To do this, use a punch, nibbler, or 

jigsaw, and file the edges of the hole.

2. Insert the scanner into the hole through the front of 

the panel.

3. Screw the top and bottom clips in place: insert the 

clip’s lip into the cutout in the scanner’s metal housing 

just behind the front panel. Tighten the screws. 

4. If you expect much panel vibration, use a rear support 

for the scanner and its interconnecting cables.

Figure 2.3 Mounting with the Mini-Bracket

Steps Using the Collar Bracket

Installing and mounting requires access to the back of the