Watlow F4T User Manual

Watlow F4T • 74 • Chapter 4 Application Examples
Application Tips:
• Process blocks are initially located in the library and can be dragged to the canvas.
• You can connect up to four sensors to the Process block. The process block passes along
the signal from the lowest number receiver that has no error on its sensor signal.
• The signal transmitted by the process block can be used by a control loop or any other
function as if it was received directly from a universal input block.
• Make sure the input blocks’ Sensor Type settings and other parameters are set correctly
for your sensors.
• Set the Process block’s Function to Sensor Backup.
Profile Ramp and Soak
In this example the temperature of an environmental chamber is measured by a thermocouple
connected to Universal Input 1 on module 1 and controlled by a control loop with a heater
connected to output 2 on module 2. The chamber also has a door switch so the profile can
sense when the door is opened or closed and a test activation circuit to turn on parts that are
being tested at specific profile steps.
Function Block Diagram

Watlow F4T Specifications

General

Inputs	Thermocouple, RTD, mA, V
Outputs	Relay, SSR, mA, V
Communication	Ethernet, Modbus RTU
Data Logging	Yes
Certifications	CE, UL, cUL, RoHS
Control Modes	PID, On/Off
Power Supply	100 to 240 VAC
Operating Temperature	0 to 50°C
Enclosure Rating	IP65
Display	4.3 in. (109 mm) color touch panel LCD
Control Loops	Up to 4