• Position 1 determines the O
2
4-20 mA signal rail limit. The settings are high,
21.1 mA, or low, 3.5 mA. The factory setting is low, 3.5 mA.
• Position 2 determines the COe 4-20 mA signal rail limit. The settings are high,
21.1 mA, or low, 3.5 mA. The factory setting is high, 21.1 mA.
• Positions 3 and 4 must be set as shown for proper software control of the device
heaters.
3.1.2 Verify configuration - Fieldbus electronics
There is one switch on the microprocessor board which must be set for the OCX 8800 with
Fieldbus electronics (Figure 3-2). SW3 configures the sample line heater control circuit. The
switch is accessible through holes in the electronics box.
CAUTION!
EQUIPMENT DAMAGE
Remove power from the transmitter before changing defaults. If defaults are changed under
power, damage to the electronics may occur.
OCX 8800 defaults - Fieldbus electronicsFigure 3-2:
Switch default positions shown.
Configuration and startup
Reference Manual 45
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