If the controller is within a limit (U
FAULT blink alternatively in second intervals (chapt. 3.3).
Input set points
The Power Controller Thyro-A is equipped with two input set points which are
isolated from the mains, of which only one is always active.
• Set point 1 analog (X2.4 – X2.3 ground)
• Set point 2 via bus module
The analog input can be adapted to the various process controllers by means of
the set point and live zero switches as well as the potentiometer controlling set point
input. The following signal ranges can be set:
0(4)-20 mA (R
= ca. 250
+5V supply voltage can be taken for a set point potentiometer from terminal X2.8.
10 k )
The effective set point is the patched through set point. Within the stated input
ranges these values with the control characteristic may be adjusted to any common
Fig. 2 Set point inputs and total set point
2.3 Control types
Thyro-A has four control types Thyro-A...H RLP with additional P-control). Mains
voltage variations and load changes are directly and quickly adjusted by bypassing
the sluggish temperature control system.
Before commissioning the Power Controller and selecting a control mode, familiari-
sation with the operating procedure and the effect upon the application is important.
), both LED PULSE INHIBIT and LOAD
), 0-5 V (R
= ca. 44 k ), 0-10 V (R
= ca. 88 k ).