Switch Mode Power Supply (Smps) - Trane TR200 Operating Instructions Manual

Control Feature
Safety Interlock
Common Start/Stop
Automatic Bypass
Run Permissive in Bypass
Basic Fire Mode
Advanced Fire Mode
Serial Communication
Table 1.3
Illustration 1.2: Bypass Curcuit with Options

Switch Mode Power Supply (SMPS)

The VFD's logic circuitry is backed up by an independent panel-mounted switch mode power supply so that,
even if the drive loses power, the control and communication functions are maintained. The SMPS converts
three-phase AC input power to 24 VDC control power. Since the SMPS draws power from all three phases, it
offers immunity protection from most phase-loss and brown-out conditions. The SMPS is internally protected
from short circuit on its output and three board-mounted fuses provide additional protection. The SMPS is not
designed for external use and may take up to 5 seconds to initialize at power-up.
Disconnects
Main disconnect
The main disconnect removes line input power to the drive and bypass. A main disconnect is available in four
options.
• Fused disconnect. Two-position (ON/OFF) rotary switch, padlock compatible, with three fuses, one on
each phase, built into the switch. For safety, the switch must be in the OFF position before the option
panel door can be opened
• Disconnect with fuses. Twoposition (ON/OFF) rotary switch, padlock compatible, with a fuse block
mounted separately from the disconnect. Three fuses, one on each phase, are located on the fuse
block. For safety, the switch must be in the OFF position before the option panel door can be opened.
• Disconnect without fuses. For user-supplied fuses option.
• Main circuit breaker. A thermal/ magnetic current interrupt device using an ON/TRIP/OFF/RESET switch.
When in the ON position, a trip fault removes power from the drive/bypass circuit and the switch
moves to the TRIP setting. It must be moved to the RESET position momentarily after the fault has
been cleared to reset the circuit breaker.
TR200 Option Panel Operating Instructions
EMB(0) EMB1
X X
X
Introduction
EMB2 ECB
X X
X X
X X
X X
X X
X
X
7