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16 Installation
S
ection 2: Installation 6888Xi Advanced Electronics Instruction Manual
December 2012 PN 51-6888Xi
6. Connect the customer’s alarm indicator devices to the alarm indicator relay terminals.
7
. Reinstall the I/O board in the card rack of the 6888Xi.
8. If your system is configured for two channel operation, repeat steps 2 through 7 to connect
the other signal wires.
9. Remove the connector from the power supply board located on the left-hand side of the
card rack inside the 6888Xi.
10. Connect the line, or L1 wire to the L1 terminal and the neutral, or L2 wire, to the N terminal.
11. Reinstall the power supply connector in the power supply board.
Flame Safety Interlock
A flame safety interlock by Emerson Process Management is available for heater power discon-
nect whenever there is a loss of the process flame or a heater runaway condition (heater over-
temperature) in the O2 Probe. This input is internally powered by the 6888Xi and is actuated via
a dry contact output from the user’s flame scanner. A closed contact indicates a flame is pres-
ent. An open contact indicates a loss of flame.
1. Connect the signal wires from the burner management system flame status output to the
flame status input terminals of J2. The flame status sensing device is supplied by the cus-
tomer. 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 6888A probe to the J2 connector.
5. Reinstall connector J1 and J2 to the AC relay board.
Traditional Architecture Cable Connections
A traditional architecture configuration is used to provide for remote location of the transmitter
electronics. All electronics are housed inside the 6888Xi. A multi-conductor power/signal cable
connects between the probe and the 6888Xi. Use the following procedure to connect the tradi-
tional architecture probe to the 6888Xi.
NOTE
The Traditional Architecture cable is provided at the specified length and is ready for installation. The cable
glands must be properly terminated to maintain EMC/EMI noise protection.
1. Run the 7-conductor cable between the traditional architecture probe and the installation
site for 6888Xi.
Use new cable conduit or trough as needed.
2. Install the cable and lead wires to the probe per manufacturer’s instructions.
3. Install the cable at the probe housing and at the 6888Xi enclosure according to the follow-
ing procedure:
a. Unscrew locking nut from gland assembly, Figure 2-4, and slide locking nut back along
FIGURE 2-4. Traditional Architecture Cable Gland Assembly