Page 11
3.3.1 Connections on the mainboard
The use of the connections is illustrated by
the wiring diagrams (see chapter 7)
3.3.1.1 Customer-side computer
interfaces
Inputs
ST08:
•
Control signal input 0...10 VDC
•
Control signal input 0...20 mA
•
Control signal input 0...140 ohm
•
Configurable digital input 12 VDC
Outputs
ST03:
•
Potential free break/make contacts NC
and NO, programmable, relay assigned
to "Collective fault" in factory setting
ST10.1/ST10.2:
•
Connection options for an optional
relay each in DIN rail version with wir-
ing harness (order option)
ST07:
•
Control output 0...10 VDC (max. 8 mA)
ST08:
•
+20 VDC supply voltage (max. 20 mA)
for humidity sensors
ST15:
•
Tap for 1,2 and N (unsecured) for cus-
tomer use
USB:
Connection for USB stick for use as a data
logger and for parameter updates
3.3.1.2 System-side interfaces
ST1:
•
4-pin screw / plug connection for the
connection of L1 and N and the inter-
lock (safety) system
ST11.1:
•
+12 V, GND, CAN bus
Inputs
ST09:
•
Input for current transformer (ELDB) /
level control (HKDB) with automatic
detection (for explanation of terms see
Glossary, Index 7)
ST04-B:
•
Galvanically isolated input (optical
coupler) for sensor electrode
Outputs
ST04-A:
•
Main contactor
ST05:
•
Blow-down pump
ST06:
•
Inlet solenoid valve
Bi-directional
ST12.1:
•
Serial interface for screen connection
ST 13:
•
Base for adapter board with RS485
interface
