Remote Alarm Contacts And Analog Output - Thermo Scientific Forma 8600 Series User Manual

RS-232 Communications
(continued)
Remote Alarm Contacts
and Analog Output
Thermo Scientific
The data transfer sequence is transmitted in the following format. X refers
to numerical temperature data.
(NUL) (-) XXX (SP) C (SP) (Error Message) (SP) (LF) (CR) (EOT) (SP)
In the event of a CNTRLFAIL, Er07, or the control probe is out of range
error, the numerical temperature data (XXX) in the transmission would be
replaced by T_ERR.
If no alarm condition exists, spaces will be sent. A total of 20 characters
will be sent.
SP - Space
CR - Carriage return
NUL - Null character (00)
If an alarm condition does exist, "Error Message" in the protocol will be
replaced by the following:
UNDERTEMP (temperature above the low alarm setpoint)
OVERTEMP (temperature below the high alarm setpoint)
PWRFAIL (AC power failure)
CNTRLFAIL (Control probe failure)
Er07 (micro failure)
* HSHX FAIL (Heat exchanger failure)
HOT COND (Hot condenser)
Note The RS-232 is not compatible with 1535 Monitor/Alarm System.
* -86C units only
8600 Series freezers have remote
alarm contacts and analog output.
See Figures 1-3 and 1-4 for the
location of the remote alarm
contacts. The remote alarm
connector is located in the parts bag
provided with the manual. It must
be installed if connecting the freezer
to an alarm system. After installing
the wiring from the alarm system to
the connector, install the connector to the freezer microboard and secure
with the two screws provided. The remote alarm provides a NO (normally
open) output, a NC (normally closed) output and COM (common). The
contacts will trip on a power outage, high temperature alarm or low
temperature alarm. They will also trip on high stage (-86C units only),
control probe and microboard failures. Figure 1-11 shows the remote
contacts in alarm state.
LF - Line feed
EOT - End of text (4)
Figure 1-11. Remote Alarm Contacts
Section 1
Installation and Start-up
s
8600 Series 1-9