CET Inc.
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Figure 4-2 Residual Current Warning Logic Diagram
Notes:
1) The IRn Alarm or Warning must return to Normal first before a new Alarm or Warning would be generated.
4.1.2 Temperature Alarm
The PMC-T402 supports up to four PT100 Temperature Inputs and provides two Setpoint levels
between 45 and 140°C: Warning and Alarm. If the temperature measurements exceed the pre-set
alarm limit, the Temperature Setpoint will become active. The PMC-T402’s Temperature inputs provide
a way to monitor the temperature condition of a certain piece of equipment and acts as an early
warning system to alert users of potential safety hazards as a result of over-heating.
The PMT-T402’s Temperature inputs are required to be pared with external 2-wire PT100 sensors,
please refer to Section 2.2.4 and Appendix A for its dimensions and specifications.
The Temperature Setpoint parameters can be programmed via the Front Panel or through the
communications:
Setup Parameter
Definition
Default
TCn Alarm Setpoint
OFF / DO Alarm / No DO Alarm
OFF
Alarm Limit
45 to 140 °C
100 °C
Time Delay
0 to 40s
5s
Active Condition
Temperature ≥ Alarm Limit
Inactive Condition
Temperature < 0.9 * Alarm Limit
Alarm Trigger
SOE, Alarm Buzzer, LED and/or DO
Table 4-3 Temperature Alarm Setpoint Parameters
Setup Parameter
Definition
Default
TCn Warning Setpoint
OFF / DO Warning DO / No DO Warning
OFF
Warning Level
0.1 ~ 0.8
0.6
Time Delay
0 to 40s
5s
Active Condition
Temperature ≥ Alarm Limit * Warning Level
Inactive Condition
Temperature < 0.9*[Alarm Limit * Warning Level]
Warning Trigger
SOE, Alarm Buzzer, LED and/or DO
Table 4-4 Temperature Warning Setpoint Parameters
The following figures illustrate the logic diagrams of the Temperature Alarm and Warning.
Figure 4-3 Temperature Alarm Logic Diagram
