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4000 ATT Family of Products
8 ATT Family of Products
The ATT product family consists of the 4000 ATT, the Model 4040 Display Unit, and the Model 4050 Digital Input/
Output Unit.
Figure 8-1: ATT Family of Products
8.1 Model 4040 Display Unit
The Model 4040 is a four line LCD display unit. It operates connected to and is powered from the ATTI bus. The Unit
is mounted in a round explosion proof junction box with a window. Two 3/4-inch conduit entries are available.
Configuration is performed with the handheld interface. The handheld interface can be connected to any point on the
ATTI bus to communicate with the Model 4040. The user may select any of the following parameters for display on
each of the three lines.
• Level (default)
• Temperature (RTD - default, or Average)
• Status (default)
• Digital I/O Unit 4, 5 or 6
• Input 1-2-3-4
• Output 1-2-3-4
• Analog I/O Unit 7, 8 or 9
• Input 1-2-3-4
• Output 1-2-3-4
Connection to spot
temperature bulb
Connection to host
computer system via:
4-Wire Mark/Space
Matrix Mark/Space
TIWAY
Whessoe Bus
GPE
L&J
Model 4040
Display Unit
Handheld Interface
connects to any unit
for system configuration
Three wire
ATTI Bus
Model 4000 ATT
Model 4000
mounted to Float Gauge
24-65 Vdc for EIA-485
48-65 Vdc for Mark/Space
65 Vac for TIWAY
4
8-65 Vac for Whessoe Bus
Connection to
four digital inputs an
d
four digital outputs
Model 4050
Digital I/O Unit