TE Technology TC-48-20 - Manual (Page 18)

18
TE Technology’s standard thermoelectric cooling assemblies (TCA) usually have at least one fan on the heat
sink. The standard configuration has the thermoelectric modules and fan(s) wired to a terminal block with
jumpers across the terminals so that the fans and TE modules are connected electrically in parallel.
However, this configuration is applicable only when applying power directly from the power supply. When
using the TCA with the temperature controller, two jumpers
MUST be removed so that the controller is
controlling power only to the thermoelectric modules. There must be no electrical connection between the
fans and the TE modules; fans must be connected directly to the power supply, not to the controller. The
controller will be damaged if this is not followed. See the TCA manual for further details, but the picture
below shows the basic setup.
Temperature Controller Connection
PROTECTION
DEVICES
DC POWER SUPPLY
THERMOELECTRIC
(PELTIER)
HOT-SIDE FAN
(ALL UNITS)
COLD-SIDE FAN
(AC-XXX UNITS ONLY)
TCA
TEMPERATURE
CONTROLLER
Terminal Block
Cover removed
for clarity. Re-
install before
operation.
Review electrical jumper connections. Remove electrical jumpers as required.