Relay Indicators
Errors and faults are indicated by the status LEDs, the fault and limit relays, the
Thyro‑Touch display, the Thyro-Tool Pro software, and the optional bus interface.
The unit signals faults in the power controller or load circuit via the FAULT LED
and fault relay K1. To identify the location of the fault, select the status line, and read
the fault log via the Thyro‑Touch display, the Thyro-Tool Pro software, or the bus
interface.
Simultaneously with the fault signal, you can use the Pulse Lock On/Off (with
acknowledgement), Pulse Lock On/Off (without acknowledgement), or Regulator
Lock On/Off (without acknowledgement) configuration to require that pulse
shutdown occur.
The Thyro-PX power controller is fitted with three relays. Each of these relays has a
change-over contact. AE recommends that users keep the default settings for K1 and
K2. Each relay can be reconfigured as normally-open or normally-closed using the
Thyro‑Touch display or the Thyro-Tool Pro software.
☞ Important
This manual describes the default configuration. Though these functions are
fully configurable, AE recommends not changing the default configuration.
Table 4‑2. Relay indications
Relay Name Description
K1 Fault relay This relay is normally-closed, and opens if a fault is detected in the
system. You can set which faults switch the relay.
K2 Limit relay This relay is normally-closed, and opens if a limit is detected in the
system. You can set which limits switch the relay. This relay opens (in
default setting) if at least one of the following values is exceeded:
• Maximum configured effective value of the load current
• Maximum configured effective value of the load voltage
• Maximum. configured active power of the load
K3 Optional relay The function of this relay is customer-configured. It is possible to
implement functions like a follow-up relay for ventilator control, or to
bypass the fault relay at system startup. K3 can also be used as an
additional fault relay or limiting relay, by re-parameterization.
ANALOG AND DIGITAL I/O
There are four standard and two optional I/O connectors on the front of the unit:
• RS-232 (with power) connector, for the optional Thyro‑Touch display
Advanced Energy
®
Thyro-PX
®
Power Controller
57010148-00G Communication Controls 4‑4
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