Perma Pure iCOOL - Manual (Page 11)

Section H: Test & Adjustment Procedures 11
G: I/O T
ERMINAL
B
LOCK
D
ESCRIPTION
The I/O terminal blocks are found on the bottom back of the cooler:
TEMP OUT TEMP OUT is located between the power connector and the relay out
connector. TEMP OUT is the standard analog output (low voltage DC output) for
Integrator Series Thermo-Electric Coolers. ICOOL
has one active 5” heat
exchanger. The output is 0vdc to 5vdc for a temperature range of 0 ° C to 20 ° C.
From left to right

Terminal 1 is the signal return.


Terminal 2 is earth ground. This terminal should be used to ground the shield of the
shielded twisted pair cable that is used to connect the analog output to a receiving
instrument.


Terminal 3 is the temperature output.
RELAY OUT RELAY OUT is located on the bottom of the unit on the right side.
RELAY OUT is the I/O terminal block used for the internal relay.
From left to right
X
Terminal 1 is the normally open relay contact. This terminal can be used in
combination with the common connection as a ready alarm to control the sample
pump. This contact will be connected to the common connection when the
temperature of the impinger is below the ready temperature.

Terminal 2 is the common relay contact.

X Terminal 3 is the normally closed relay contact. This terminal can be used in
combination with the common connection as a high temperature alarm. This contact
will be connected to the common connection when the temperature of the impinger is
above the ready temperature.