THERMOCUBE PAO CHILLER PART # 52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS, 167 MYERS CORNERS ROAD, WAPPINGERS FALLS, NY 12590 20
TELEPHONE: (845) 296-1300 FAX: (845) 296-1303 WEB: WWW.SSCOOLING.COM VERSION M9
Notes:
1) Each data set is independent and can be run separately
2) The command byte is always active, so be careful when sending that the three most significant bits
(bits 5-7) are set correctly. Bit 7 is remote operation (1 = remote), bit 6 is ON/OFF (1 = ON = unit
controlling temperature), bit 5 is Data direction (1 = host to controller, e.g. host sends set point to
controller).
3) The ThermoCube PAO can store 8 bytes of transmission and can only handle up to 3 commands per
second.
4) The ThermoCube does not echo back commands from the host.
5) If RS-232 communications does not seem to be functioning, cycle the main power to reset.
RS-232 Communication Examples:
1) Send set point of 25°F to chiller
Host sends command byte = E1 (hex)
Host sends LOW data byte = FA (hex)
Host sends HIGH data byte = 00 (hex)
2) Receive chiller set point
Host sends command byte = C1 (hex)
Chiller sends LOW data byte = set point value in hex (LB)
Chiller sends HIGH data byte = set point value in hex (HB)
3) Receive RTD temperature
Host sends command byte = C9
Chiller sends LOW data byte = actual temp in hex (LB)
Chiller sends HIGH data byte = actual temp in hex (HB)
4) Receive the faults table
Host sends command byte = C8
Chiller sends faults data byte = fault data in hex
5) Send Remote Start only
Host sends command byte = E0
Host sends command byte = A0
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