SWITCHBACK 6600 PSTC
Reliable, Ripple-free DC Power Combined with PrecisionTemperature Control

For Cleanstream and Terraview Thermoelectric Heat Exchangers
The Switchback 6600 PS/TC is a bipolar current-controlled
power supply with digital temperature control that is
optimized for use with our heat exchangers. It’s variable
power results in maximum efficiency, while the 16 bit PID+ fuzzy logic temperature control results in precision
temperature to ± 0.05 °C.

S P E C I F I C AT I O N SDescription

Switchback 6600 power supply
with Yokogawa UT-55A digitaltemperature controller with up
to 8 programmable recipes

Cooling

External 4.69” fan (provided).
Leave >1.5” clearance around air
intake and exhaustCable

15-foot DC power/thermostat
cable with acid-proof Fischer
connector

Fault Signal

A TTL high signal indicates 		
normal operation. If a thermal
shutdown or output stage
overload occurs, a TTL signal
low is produced.

Operating Range

0-40 °C, no derating

Operating Humidity

0-80% relative humidity,
non-condensing

Remote Sensing

A 0-5 VDC signal proportional
to the output current at
IMAX/5 amps per volt, where
IMAX is the maximum output
current setting

Communications(option 1)

Remote 0-10 VDC input for
set-point temperature

Communications(option 2)

RS-485 communication +remote input

Over-current
Protection

Automatic electronic current
limiting is provided

Input Power200-240 VAC (±5%), 3-phase
22 amps, 50 or 60 Hz, 3-wireplus ground

Thermal Protection

Automatic shutdown when heatsink reaches 70 °C; automatic
restart at 53 °C

Line Filtering

Integral line filter meets CE
conducted emissions requirement

Isolation

Can withstand a 3000 VDC
Hipot with input and outputterminals tied together

Rated Capacity

6.9 kW

Digital Inputs

Output Current

0-30 amps

Output Voltage

0-230 VDC

Three digital inputs for selecting
pre-programmed temperature
setpoints

Output Current
Control Range

Maximum output current (IMAX)
is dipswitch adjustable from
6 to 30A

Courtesy Outputs

12 VDC, 150 milliamps; 5 VDC,20 milliamps

Analog Outputs

4-20 mA retransmission ofpresent temperature value
standardInterlocks

Three interlocks for automatic
shut down of output current:
RTD fault, Power supply fault
Thermostat faultTemperature Sensor

3-wire 100 Ω Pt RTD, α = .0385

Size (L x W x H)

19” x 5.25” x 17”(48.3 x 13.3 x 43.2 cm)

Weight24 lbs (10.9 kg)

Power Required

3-phase 208 VAC, 22 amps

Output Power

Bi-polar, 0-230 VDC, 0-30amps, user adjustable maximum
output ranges from 14-230 VDC
and 6-30 amps.

AlarmsFour programmabletemperature alarms

Output Voltage Limit

Non-isolated Output

Maximum output voltage(VMAX) is dipswitch adjustablefrom 14 to 230 VDC
The power supply output is not
isolated from the AC input. Theoutput must not be connected
to secondary referencedcircuitry. Input voltage must be
disconnected to prevent
hazardous potentials fromappearing at the output. DCcontrol and logic circuits are
isolated from the AC line andDC output.

Voltage Ripple<2.5 Volts for 0-50 VDC;
<5% for 50-220 VDCRegulation<5% of actual output current

Control Band Width

The current control loop
bandwidth varies with the load
resistance (RLOAD) by thefollowing relationship:
Bandwidth = 5288/RLOAD (Hz)Transient Response

Output current will regulatewithin 10 milliseconds of a
setpoint change or loadtransient of up to 50%