Watlow F4T Installation And Troubleshooting User’S Guide

Watlow F4T Install & Troubleshooting • 16 • Chapter 2 Install and Wire
Example: Using a Current Transformer
Controller
Output N
CT Input
L2 L1
Fuse
SSR
3A x 4
12A
48mA
48mA
12A
x 4 = 48A
Turns around CT
Turns around CT
CT Primary Current
CT Secondary Current
Total current
CT Ratio R = 1000:1
:
I
s
= I
p
T/R = 50mA
ISC = Ip(full scale) = 50mA(R)/T
CSI = Output N
I
s = Current in secondary of current transformer
I
p = Current in primary of current transformer
T = Number of turns through the primary of the transformer
R = Number of turns in the secondary of the current
transformer (Turns ratio, assuming one primary turn)
ISC = Input Scaling (parameter found in Current function block)
CSI = Current Output Source Instance (parameter found in Current function bloc
k)
Anderson-Bolds ~ 216-360-9800
www.anderson-bolds.com

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