Rosemount OCX 8800, Instruction Manual

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Instruction Manual
IM-106-880, Rev 2.1
April 2017
OCX 8800
3-3
Verify that the following switch settings are correct for your OCX 8800
installation:
SW1 The two settings are internally or externally powering the O
2
4-20
mA signal. The factory setting is for the O
2
4-20 mA signal to be internally
powered.
SW2 The two settings are internally or externally powering the COe 4-20
mA signal. The factory setting is for the COe 4-20 mA signal to be
internally powered.
SW3 The factory sets this switch as follows:
• 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.
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. This switch is accessible through holes in the
electronics box.
Verify that the following switch settings are correct for your OCX 8800
installation:
SW3 The factory sets this switch as follows:
• Position 1 not used.
• Position 2 not used.
• Positions 3 and 4 must be set as shown for proper software control of
the device heaters.
Remove power from the OCX 8800 before changing defaults. If defaults are changed under
power, damage to the electronics may occur.