If a fault occurs the LED LOAD FAULT blinks and the alarm relay K1 is released.
2.5.4 Ventilator monitoring
The separately ventilated Power Controllers (..F..) are fitted with thermal monitoring.
The temperature of the heat sink is measured. In case of a temperature overrange a
fault indication ensues and relay K1 switches default settings.
2.6 Set point processing when employing a bus module
The set point processing depends on how the bus module is connected to the Power
Controller. Different variations can be realized depending on the requirements. The
circuit of Thyro-A's terminal X22.1 controls the procedures (Chap. 2.2, fig. 2).
• No connection to X22.1
The bus module is fully functional, the set point value is, however, only accepted at
the controller via the control terminal as analog signal.
• Connection to X22.1 with ground potential
The setpoint value is only accepted by the bus module. The controller's terminal
X22.1 can be directly connected to earth if an alternative operation is excluded.
• Connection to X22.1 is switched
• Thyro-A's circuit X22.1 is connected to one of the terminals X1.1 to X8.1
of the bus module (Fig. 2). In case of malfunctions on the bus line, the set point
value will be taken automatically from the Power Controller analog input
(2 000 000 848 / 849).
• Thyro-A's circuit X22.1 is connected to one of the terminals X1.5 to X8.5 of the
bus module (Fig. 2). In case of malfunctions on the bus line, the set point value
will be taken automatically from the Power Controller analog input, as indica-
ted in Chapter 3.2, or the last set point value is held.
Additionally, every controller connected to the bus module can be released by
"hand" (Chapter 3.2 "set output data=0").