Power Supply (Optional) - Emerson ControlWave EFM Instruction Manual

ControlWave EFM Instruction Manual
2.8 21V Power Supply (Optional)
Table 2-4 - 21V Power Supply Board Terminal Designations
21VPS
TB#
TB1-1
TB1-2
TB1-3
TB2-1
TB2-2
TB2-3
TB2-4
2-28
The 21V power supply is typically used to provide power to
temperature and pressure transmitters (such as the Bristol 3508) that
require higher than +12V but lower than +21.4V (± .8V) to operate.
The 21V power supply has two terminal blocks that accommodate
power connections between the EFM and the remote transmitters. TB1
is a three-position terminal block that provides input power from the
power distribution board (see Section 2.7). Four-position terminal block
(TB2) provides +21V power and ground to the remote transmitters. See
Table 2-4 and Figure 2-18 for details on these connections.
Figure 2-18. 21V Power Supply Board
21VPS TB Connection to
Name Power Dist. Bd.
+12VIN TB3-1
12VGND TB3-2
CHASSISGND N/A
+21V N/A
21VGND N/A
+21V N/A
21VGND N/A
Installation
Connection to
XMTR
N/A
N/A
N/A
XMTR1+
XMTR1-
XMTR2+
XMTR2-
Revised Dec-2013