THERMOCUBE PAO CHILLER PART # 52-400-2G-1-PAO
SOLID STATE COOLING SYSTEMS, 167 MYERS CORNERS ROAD, WAPPINGERS FALLS, NY 12590 18
TELEPHONE: (845) 296-1300 FAX: (845) 296-1303 WEB: WWW.SSCOOLING.COM VERSION M9
7.2 ENHANCED RS-232 COMMUNICATIONS (STANDARD)
ThermoCube PAO comes with an Enhanced RS232 communication
port. The chiller uses this port to communicate a comprehensive set of
control parameters with a Host PC - these parameters are outlined
below. This port is a 9-pin female d-sub connector and is found on the
rear panel of the chiller (see Figure 3C and 3D).
-ES: Enhanced RS-232 Communications (Standard, not shown in part number)
Wiring: Proper wiring depends upon whether the equipment being cooled (the Host) is wired as Data
Computer Equipment (DCE) or Data Terminal Equipment (DTE)
Table 1A: Signal definition and wiring for Host wired as DTE
Note: Use a null modem cable if your RS-232 is set up as a DCE.
Communication Specification
Speed: 9600 baud
Data Flow Control: None
Data Format: 8-bit serial
Number of Stop bits: 1
Parity: None
Transmission Breakdown: One command byte followed by zero, one, or two data bytes depending on
data type.
Master/Slave: ThermoCube is always the SLAVE (DTE)
Interrupts Reported: None, must be polled for status
Transmission Length: < 15 meters
Data Update Frequency: Once per second
Maximum Polling Frequency: Three commands per second
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