Toshiba Q9 Series - Manual (Page 3)

HVAC-Minded
Designed for HVAC Systems
The Q9 ASD is designed for HVAC systems offering many popular features needed in the industry.
It comes equipped with a fire-speed circuit that forces the drive to run at a preset speed during
a smoke purge. The Q9 also provides a damper-permissive function that can be used to protect
from over-pressuring ductwork.
A user can set a low-output disable time to force the drive to zero-speed if the drive runs at the
lower limit frequency for a specified time. This option helps reduce energy costs.
PID Control
A built-in proportional/integral/derivative (PID) controller, used to regulate a process without
the need for external control devices, comes standard with the Q9. In addition, the wire-break
function trips the drive if the feedback signal drops below specified levels. This prevents the drive
from accelerating to maximum speed and helps protect the system.
Communications
The Q9 supports many common
protocols used in HVAC applications
including:
• BACnet (MS/TP) ®
• LonWorks ®
• Metasys N2 ®
• Modbus RTU ®
• APOGEE FLN ®
Internal Communication Option Cards