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Product Service: Domestic 1-800-522-7658, International 816-333-8811
Chapter 6: Using the Recorder Jack
Cable configuration for 9 pin male connector
(Labconco accessory cable part number 7534000)
The purpose of the RS232 interface is to send data to a
data collection computer to monitor the state and
activity of the freeze dryer. This data is half duplex
data. The data properties are as follows:
1. Data Rate 2400 Baud
2. 8 Bit word length
3. 1 Start bit, 1 Stop bit
4. No parity is transmitted
5. Standard ASCII character set
The format of the transmitted message is as follows:
COLLCTR = -48
– indicates the temperature of the
collector in degrees Celsius.
VAC = 0018
– indicates the vacuum level of the system
in mBar x 10
-3
.
RFG =ON
– indicates the state of the refrigeration
compressor.
VAC = ON
– indicates the state of the vacuum pump.
View from back of computer
1-DCD (Data Carrier Detect)
2-RX (Receive Data)
4-DTR (Data Terminal Ready)
5-GND (Signal Ground)
6-DSR (Data Set Ready)
7-RTS (Request to Send)
8-CTS (Clear to Send)
View from front of Labconco Freeze Dryer
1-TXD (Transmit Data)
4-AGND (Analog Ground)
BASE: <COLLCTR=-48 VAC=0018 RFG=ON VAC=ON>