Watlow F4T User Manual

Watlow F4T • 81 • Chapter 5 Function Reference
5
Chapter 5: Function Block Reference
Function Block Reference (cont.)
Wet Bulb / Dry Bulb ...................................................... 178
Switch Over
............................................................. 179
Differential
.............................................................. 180
Ratio
.................................................................. 180
Add
................................................................... 181
Multiply
................................................................ 181
Absolute Difference
....................................................... 182
Minimum
............................................................... 182
Maximum
.............................................................. 183
Square Root
............................................................ 183
Vaisala
®
RH Compensation ................................................ 184
Pressure to Altitude
...................................................... 184
Special Output
...................................................187
Off
.................................................................... 187
Compressor Control
...................................................... 187
Sequencer
.............................................................. 190
Motorized Valve
.......................................................... 191
Temperature Input
.................................................192
Resistance Temperature Device (RTD) 100 and 1000 Ohm
........................ 192
Thermocouple
........................................................... 193
Thermistor Input
..................................................195
Timer
.........................................................197
Off
.................................................................... 198
On Pulse
............................................................... 198
Delay
.................................................................. 200
One Shot
............................................................... 201
Retentive
............................................................... 203
Universal Input
..................................................204
Millivolts/Volts
........................................................... 205
Off
.................................................................... 208
Thermocouple
........................................................... 208
Milliamps
............................................................... 209
Resistance Temperature Device (RTD) 100 and 1000 Ohm
........................ 212
1K Potentiometer
........................................................ 213
Variable
........................................................216
Analog
................................................................. 216
Digital
................................................................. 218

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