Power Supply - Omega PX2088 User Manual

FIGURE 4-8. Transmitter Field Wiring.
Ground Terminal
Positive Terminal
Negative Terminal
Test Terminal

Power Supply

The dc power supply should provide power to the transmitter with less than one
percent ripple. The total loop resistance load is the sum of the resistance of the signal
wires and the resistance load of the controller, indicator, and other pieces of
equipment in the loop. Note that the resistance of intrinsic safety barriers, if used,
must be included. Figure 4-9 shows the transmitter power supply load limitations.
FIGURE 4-9. Transmitter Load Limitations.
MODEL PX2088
Max. Load = 45.4 (Power Supply Voltage) –10.5
Power Supply (dc Volts)
(1)For CENELEC EX ia approval, power supply
must not exceed 30 volts.
NOTE
Minimum load impedance for Output Code M
is 100 kilohms.
Signal loop may be grounded at
any point or left ungrounded
Operating
Region
(1)
4-10
Power
Supply