MEB Options
4-DO MEB
With the optional 4-DO MEB installed, the flow computer provides four
discrete outputs to drive customer low-power output devices such as relays,
solenoids, and other devices that are DC-resistive in nature. Up to six
boards may be installed in the unit.
A unique address that determines the software configuration must be set
using jumpers J1 through J3 for each 4-DO MEB installed. The address
jumpers are configured as shown in the table below.
Table 4–10. Address jumper configuration for 4-DO MEB
Board #
J3
J2
J1
1
Not installed
Not installed
Not installed
2
Not installed
Not installed
Installed
3
Not installed
Installed
Not installed
4
Not installed
Installed
Installed
5
Installed
Not installed
Not installed
6
Installed
Not installed
Installed
After installing the MEB according to
earlier in this chapter,
connect TB1 on the 4-DO MEB to the MEB terminal block (TB2) on the
enclosure door panel as shown below.
Table 4–11. 4-DO MEB to TB2 connections
Color
TB1 on 4-DO MEB
TB2 on Enclosure Door
Blue
TB1-2 (+5V)
TB2-3 (VCC)
Yellow
TB1-3 (SDA)
TB2-4 (SDA)
White
TB1-4 (SCL)
TB2-5 (SCL)
Power for each discrete output is customer supplied and is independent of
the flow computer's input power, unless it is connected to an internal
board. Each signal provided by the board is an open drain FET output
contact closure detected as a level signal. Some optional boards may require
the internal use of one or more of the discrete outputs, making them
unavailable for use.
The discrete outputs are identified in the following table. Refer to
for typical discrete output wiring for the MEB (see
for a detailed wiring diagram).
4-DO MEB
Address Jumpers
Connection to MEB
Terminal Block
Discrete Outputs
4-12 AutoPILOT PRO Flow Computer User Guide
Thermo Fisher Scientific
