Watlow F4T User Manual

Watlow F4T • 70 • Chapter 4 Application Examples
• The control loop is not necessary for the alarm; it is shown here just to make it clear
that more than one function block can receive the analog input signal.
• Make sure the input block’s Sensor Type and other parameters are set correctly for
your sensor.
• By default the alarm’s type setting is Off. Set it to Process Alarm.
• Set the alarm’s Sides setting to High or Low if you want to monitor only for the pro-
cess value going too high or too low, or set Sides to Both if you want the alarm to occur
when the process value is either too high or too low.
• For more information on alarm parameters see the section entitled "Alarm" in Chapter
5.
Deviation Alarm
In this example Universal Input 1 on module 1 measures the temperature of a chamber or ov-
en with a thermocouple. Alarm 1 monitors the temperature from the universal input which is
also used by the control loop as feedback for heat control. When the temperature gets farther
from set point than the user-adjustable, alarm set points, output 1 on module 4, a form C re-
lay energizes an audible alarm and an indicator lamp to get the operator’s attention.
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