Emerson Rosemount 6888C, Instruction Manual

Page: 28 / 88

4.5 Connecting the Transmitter probe to the
single-channel safe area Xi and flame safety
interlock
A flame safety interlock by Emerson
™
is available for the heater power disconnect
whenever there is a loss of the process flame or a heater runaway condition (heater over-
temperature) in the O
2
probe. This input is internally powered by the Rosemount 6888 Xi
and is actuated via a dry contact output from the user's flame scanner. A closed contact
indicates a flame is present. An open contract indicates a loss of flame.
1. Refer to Figure 4-4 . Connect the signal wires from the burner management system
flame status output to the flame status input terminals of J2.
You must supply the flame status sensing device. Refer to the applicable OEM
documents for signal wiring details.
2. Remove the J1 and J2 connectors from the AC relay board.
3. Connect the AC line input to the J1 connector.
4. Connect the AC power to the Rosemount 6888C probe to the J2 connector.
5. Reinstall connector J1 and J2 to the AC relay board.
Rosemount 6888C product matrix
Compare the configuration matrix below to the model number on the probe tag to
confirm the features present in this specific probe.
Table 4-1: Housing and Electronics
1HT Standard housing, transmitter electronics, HART communications
2HT Integral autocal, transmitter electronics, HART communications
4FF Integral autocal, transmitter electronics, Fieldbus communications
5DR Standard housing, direct replacement, no electronics
6DRY Standard housing, direct replacement, YEW electronics
Rosemount 6888 Xi product matrix - safe area only
Compare the configuration matrix below to the model number on the probe tag to
confirm the features present in this specific probe.
Table 4-2: Remote Type
1OXY Single channel O
2
2OXY Single channel O
2
with flame safety interlock for heater
3OXY Dual channel O
2
4OXY Single channel O
2
traditional architecture for 120 V probes
Install Instruction Manual
July 2018 00809-0100-4891
28 6888C