Danfoss VLT HVAC Drive FC 100 Series, Руководство по конструкции

Страница: 134 / 207

6.1.13 Cascade Controller Wiring Diagram
The wiring diagram shows an example with the built-in BASIC Cascade Controller with one variable-speed pump (lead) and
two fixed-speed pumps, a 4-20 mA transmitter and system safety interlock.
Figure 6.11
6.1.14 Start/Stop Conditions
Commands assigned to digital inputs. See Digital Inputs , parameter group 5-1*.
Variable-speed pump (lead) Fixed-speed pumps
Start (SYSTEM START /STOP) Ramps up (if stopped and there is a
demand) Staging (if stopped and there is a demand)
Lead Pump Start Ramps up if SYSTEM START is active Not affected
Coast (EMERGENCY STOP) Coast to stop Cut out (built in relays are de-energized)
External Interlock Coast to stop Cut out (built in relays are de-energized)
Table 6.1
Application Examples
VLT
®
HVAC Drive Design Guide
6-8 MG11BB22 - VLT
®
is a registered Danfoss trademark
6 6