24
WIRING FOR REMOTE COMMUNICATIONS
Remote communications with the InSight II scanner uses an RS485 Interface to carry the communi-
cation signals. A Windows
®
compatible PC running Fireye software is required to communicate
with the flame scanners, see CU-109.
The wiring configuration for remote communications is
dependent on the distance between the scanner and the control room.
For distances less than 200 feet,
wire the Fireye cable P/N 59-546 and 59-547 to the female quick
disconnect in the manner previously described, and run the cable directly back to the burner manage-
ment system.
For wiring distances when the InSight II scanner to the control room is greater than 200 feet,
remote communications requires wiring a twisted, shielded pair of wires in a “multi-drop” wiring
configuration. If communications problems occur, use a terminating resistor at the scanner located
farthest from the communication source.
Note: The maximum distance for the communication wiring for all associated InSight scanners is
1,000 feet at 19200 baud. The maximum number of scanners connected to the communication link is
32 scanners. Exceeding this total wiring length or number of scanners requires the installation of bi-
directional repeaters or amplifiers. Consult the factory for additional information.
FIGURE 18.
WIRING FOR REMOTE COMMUNICATIONS
Conversion Harness, P/N 59-4647-10TB
Fireye offers the 59-4647-10TB Conversion Harness allowing users to replace an InSight I scanner
with a model 95DSS3-1 InSight II scanner by attaching their existing InSight I cable to the connector
on the harness junction box. The Conversion Harness includes two 3-meter (9 ft. 10 inch) cables, p/n
59-546-3 and 59-547-3, connecting the Harness to the InSight II scanner.
Note: The conversion harness is not required when using the model 95DSS3-1WINC.
BELDEN 9841
BELDEN 9841
1. WHEN THE DISTANCE FROM THE SCANNER TO THE CONTROL ROOM < 200 FEET. (Typical “STAR” Configuration)
2. WHEN THE DISTANCE FROM SCANNER TO CONTROL ROOM > 200 FEET. (Multi-Drop Configuration)
BELDEN 9841
PC WITH
BELDEN 9841
59-546
BELDEN 9841
BELDEN 9841
JUNCTION
BOX
RS485
COM A
COM B
SOFTWARE
CABLE
59-546
CABLE
59-546
CABLE
RS485-RS232
CONVERTER, P/N IC485
RS485-RS232
CONVERTER, P/N IC485
59-547
CABLE
59-547
CABLE
BURNER
MANAGEMENT
SYSTEM
FIREYE
PC WITH
SOFTWARE
FIREYE
59-547
CABLE
59-546
59-546
59-546
59-547
59-547
59-547
or RS485-USB converter P/N UC485
or RS485-USB converter P/N UC485
SCANNER 1
SCANNER 2
SCANNER 32...
BURNER
MANAGEMENT
SYSTEM
RS485
COM B
COM A
