Publication 900-UM007D-EN-E - January 2011
Configuration & Basic Operation
3-51
•
The allowable controller heater current range is 0.1…49.9 A. Heater
burnout, HS, and heater overcurrent are not detected when the
configured alarm value is 0.0 or 50.0.
When the configured alarm value is 0.0, the Heater Burnout Alarm is
always OFF, the HS, and HO Alarm is always ON.
When the configured alarm value is 50.0, the Heater Burnout Alarm is
always ON, and the HS Alarm is always OFF, and the HOA is always
OFF.
•
Configure the total current value for normal heater operation to 50 A or
less. When a current value of 55.0 A is exceeded,
ffff
is displayed in
the Heater Current 1 (and 2) Value Monitor and Leakage Current 1 (and
2) Monitor parameters.
Application Examples
Single-Phase Heaters
EXAMPLE
Using a 200V AC, 1 kW Heater
The heater power supply provides 5 A when the current is normal, and 0 A
when there is a burnout.
Figure 3.99
Therefore, the heater burnout detection current is calculated as follows:
CT
0 A
200 V
CT
5 A
→
←
5 A
200 V
Normal
AC line
Load
Load
AC line
To CT Controller input
To CT Controller input
Burnout
Load (such as a heater)
Burnout
Heater burnout
detection current =
(Normal current) + (Heater burnout current)
2
=
5 + 0
2
= 2.5 [A]
Summary of Contents for Allen-Bradley 900-TC16
Page 1: ...USER MANUAL Bulletin 900 TC8 900 TC16 900 TC32 Series B Temperature Controllers...
Page 2: ...2...
Page 72: ...Publication 900 UM007D EN E January 2011 3 2 Configuration Basic Operation Figure 3 3 900 TC32...
Page 136: ...Publication 900 UM007D EN E January 2011 3 66 Configuration Basic Operation Notes...
Page 340: ...Publication 900 UM007D EN E January 2011 5 112 Parameter Functions Definitions Notes...
Page 350: ...Publication 900 UM007D EN E January 2011 6 10 Troubleshooting Error Indication Notes...
Page 406: ...Publication 900 UM007D EN E January 2011 D 8 Glossary Notes...