IM_1XTXSW-08
www.ueonline.com
7
The One Series may be powered from the analog loop current power
supply (like most transmitters) using only 2 wires. This configuration
provides a digital displaying 4-20 mA output transmitter. The process
variable and diagnostic information is available on the display. All
device functions, including SW1, SW2 and IAW
®
OUTPUT are powered
by the loop current power supply and require additional wiring, if used.
Refer to the Wiring example (see Figure 8) for more information.
The One Series may also be powered by direct connection to a 20 – 40
VDC power supply. All device functions, including SW1, SW2 and IAW™
OUTPUT are powered. In this configuration, the analog 4-20 mA output
is disabled. Refer to the Wiring example (see Figure 8) for additional
wiring methods.
NOTE:
A series resistor is required for supply voltages above 24 VDC.
See Table 4 on page 9.
+
-
RED
TB1
Logic Solver
Analog Inputs
Ain1+
24 VDC Loop
Power
+
-
RED
TB1
Power Supply
24 VDC
+
Power Options
+
TB 2
+
TB3
TB 2
TB2
3
3
SW1
SW2
TB3
Logic Solver
Discrete Inputs
Din1+
Din2+
Din3+
Din4+
Din5+
Din6+
DC Common
+24 VDC
0.3 A max.
TB3
This diagram provides an example wiring scheme for SW1, SW2
and IAW
®
OUTPUT switches.
• SW1 is connected to an external load, providing a means
to switch a local device (e.g., lamp, horn, etc.) to provide a
warning that the high limit set point has been reached.
• SW2 is connected to a logic solver discrete input (Din6) for
remote monitoring of the high-high set point to initiate a
shutdown.
• IAW
®
OUTPUT is connected to logic solver discrete input
(Din1) for remote monitoring of the One Series diagnostics.
This normally-closed switch will open if a fault is detected.
NOTE:
All switches in this wiring example are connected to DC
Common but can be separated to maintain power supply isola-
tion. SW1 and SW2 are independently configurable for open,
close and window modes on rising or falling media. Wiring con-
nections to these switches is optional.
*Model 1XTXSW Only
Wiring Example*
Figure 6
Figure 7
Figure 8
