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Thermometer Resolution
0.5 °C (0.9 °F)
Temperature Conversion Time
1 second
Open Collector Thermostat Outputs
Low (on) voltages:
High (off) voltages:
Power Supply
Port powered with RTS and DTR outputs set high
External power: 12VDC @ 30mA
NOTE: When using an external supply, the supply should be
connected only to specifically labeled power inputs (power
jack, terminal block, etc.). Connecting an external power supply
to the handshake lines may damage the unit. Contact technical
support for more information on connecting an external power
supply to the handshake lines.
RS-232 Connections
The 232DTT communicates using pins 2, 3, and 7 (TD, RD
and GND). However, power is drawn from the handshake lines RTS
(pin 4) and DTR (pin 20). These connections must be present to
power the unit.
2
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
PH (815) 433-5100 -- FAX (815) 434-7094
1.2VDC @ 100 mA max.
40VDC max.
Table 1. RS-232 Pinouts
Signal
Pin
TD
2
RD
3
RTS
4
GND
7
DTR
20
Chapter 1
232DTT1795 Manual
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