LED STATUS INDICATION
The cascade module has a Status LED – LED A (Green).
•
LED A: Constant Green Indication - Modular is OK
•
LED A: Flashing Green Indication – No Communication with drive
•
LED A: LED Off Indication – No power to module
LED B is not used.
V3 SERIES HVAC DEFAULT OPERATION
The additional relays will assume default configuration while
the DOL cascade function is disabled. Default (none cascade)
functions are listed in the table below) Once the DOL cascade
function is enabled (P8-14 = 1) the relays will assume DOL
operation as detailed in the ‘V3 HVAC cascade operation’ section
of this manual.
Default Operation (DOL Cascade disabled, P8-14=0)
Relay 3 Drive Healthy Indication (close on Healthy)
Relay 4 Drive Fault Indication (close on fault)
Relay 5 Drive Running Indication (close on enable)
V3 HVAC CASCADE RELAY CONFIGURATION SUMMARY
P8-14
P9-41 Function Selected
0
0
Default Operation
1
0
Cascade Operation
N/A
1
PLC Logic Defined Operation
MECHANICAL INSTALLATION
1. Option module inserted
into drive option
module port.
2. DO NOT use excessive
force when inserting the
option module into
the options port.
3. Ensure the expansion
module is fitted securely
before powering on the drive.
4. Remove terminal block header from
option module prior to tightening
connections. Replace when wiring is completed. Tighten
to Torque setting provided in Specifications.
OPTION MODULE CONTROL TERMINALS
Pin Function
1
Relay 3 Common
2
Relay 3 Contact
3
Relay 4 Common
4
Relay 4 Contact
5
Relay 5 Common
6
Relay 5 Contact
Option Module Slot
Option Module
HVAC Option Module
CONNECTION OF THE CASCADE MODULE TO P2 SERIES
The HVAC Cascade Expansion module can be used with a P2 Series model drive. For
P2 Series operation, the default or PLC defined functionality is available, but there is
no option to implement Cascade control. The table below shows relay configuration
summary when the module is connected to P2 Series drive.
P9-41
Function Selected
0
Default Operation
1
PLC Logic Defined Operation
Default operation is identical to the V3 Series default operation.
V3 SERIES HVAC CASCADE OPERATION
The V3 Series HVAC DOL Cascade control uses a maximum of three relays from the
cascade option module and the 2nd user relay from the standard drive terminals,
giving the potential for 4 separate pumps under DOL control. The cascade option
module is required if the system requires more than 1 DOL pump or when the 2nd
user relay on the drive is required for another function. The basic configuration for
the drive and DOL pumps is shown below.
In this configuration the 2nd drive relay is used to control the first DOL pump with
the cascade module controlling the remaining DOL pumps. In this configuration P2-
18 must be set to 8 to configure the 2nd drive relay for DOL pump control. P8-14
must be set to enable the DOL cascade function and P8-15 must be set with the
number of pumps that make up the cascade system (from 1 to 4). The relays in the
cascade module are assigned automatically starting with the lowest numbered relay.
If the 2nd relay is not assigned to DOL control then the configuration is as
shown below and a maximum of 3 DOL pumps are permitted.
For this configuration, only parameters P8-14 and P8-15 need be set and the relays
in the cascade module are assigned automatically starting with the lowest numbered
relay. When cascade mode is enabled (P8-14 = 1), the relays contained on the
cascade option module are dedicated to the cascade function.
LED A (Green)
Mains Input Supply
Mains Input Supply
Cascade Relay Module
Cascade Relay Module
Sensor
Feedback
To Drive
PID
Sensor
Feedback
To Drive
PID
Relay 2 Output
Master Pump
Master Pump
DOL Pump 1
DOL Pump 1
Pump Output Channel
Pump Output Channel
DOL Pump 2
DOL Pump 2
DOL Pump 3
DOL Pump 3
DOL Pump 4
Relay 3 Output
Relay 3 Output
Relay 4 Output
Relay 4 Output
Relay 5 Output
Sensor
Sensor
Relay 5 Output
