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XNX Universal Transmitter
Section 2 - Installation and Operation
50
the Searchline Excel Technical Handbook (2104M0506) or
Searchpoint Optima Plus Operating Instructions (2104M0508)
forspecicsonremoteinstallationsorcontactyourHoneywell
Analytics representative for more information.
Searchpoint Optima Plus or Searchline Excel Wiring Recommendations
When wiring the XNX transmitter and the Searchpoint Optima
Plus or Searchline Excel for remote applications, the general
recommendationsoftheANSI/TIA/EIA-485-Astandardmustbe
adhered to with the following additions:
1. When mounting the Searchline Excel or Searchpoint
Optima Plus, run wiring connections between each Excel
or Optima and the transmitter in a dedicated separate
conduit.
2. Use 18 AWG twisted shielded cable for the RS485
connection between Excel or Optima and the XNX. Make
sure that the shield of the cable is grounded to earth and
XNX ground on one end ONLY.
3. Avoid running wiring near main cables or other high
voltage equipment.
4. Do
not
apply 120 ohm terminating resistors. These
resistors are not required due to low data rates.
5. Honeywell Analytics recommends that Excel or Optima
sensors and the XNX transmitter be wired to building
ground. The system should be grounded at one point only.
INSTALLATION TIP:
Always perform a soft reset after connecting the Searchpoint
OptimaandXNXtransmitterforthersttime.Thesoftresetis
performed by accessing the transmitter’s Calibration Menu.
HART
20 mA
Operation
LOCAL
J1
S1
+V 1-1
Searchline
Searchpoint
4-20mA
HART
18-32 VDC
13.2W max.
1-2
-V 1-3
1-4
+mA 1-5
-mA 1-6
1-7
- Ir
+ Ir
1-8
Sig 1-9
S1
Source
Sink
Isolated
S2
S2
Ir TB-1
TB-2 Ir Data
S3
Source
Sink
S4
IR Sens (silver)
IR +ve (red)
IR -ve (black)
RS485+ (yellow)
RS485- (blue)
IR Sens
IR +ve
IR -ve
RS485+
RS485-
Twisted Shielded Pair
18 AWG
Single Ground Point
RS485 Cable Shield
Ground ONE END ONLY
Power Supply
+ve
-ve
Junction Box
Searchline Excel
Searchpoint Optima Plus
Pair 1: Unit Ground and IR Sense
(Cable Shield Grounded ONE END ONLY)
Pair 2: RS485+ and RS485-
(Cable Shield Grounded ONE END ONLY)
Pair 3: IR +ve and IR -ve
(Cable Shield Grounded ONE END ONLY)
Unit Gnd (green)
Figure 55. XNX IR Remote
Wiring
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