XNX UNIVERSAL XNX Universal Transmitter Technical Manual

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XNX Universal Transmitter

Section 2 - Installation and Operation

5. Attach the conduit to the remote terminal box.

6. In the remote junction box, connect the wires from the

transmitter to the 3-way terminal block in the terminal box.

Note: The black and red wires from the MPD are not used with the

XNX mV personality board. Ensure that they are properly isolated

from live connections. Do NOT cut the wires.

Warning: The enclosures of remotely mounted 705HT sensors

contain aluminum. Be careful to avoid ignition hazards due to impact

or friction when installed in Zone 1 locations.

Allcableportdevicesandblankingelementsshallbecertiedin

typeofexplosionprotectionameproofenclosure“Exd”or“Exe”,

suitable for the conditions of use and correctly installed.

7. Attach and wire the sensor in the terminal box.

8. Fit the terminal box lid.

9. Fit the sensor.

10. Calibrate the sensor following the procedure in Section 3.2

- Calibration.

2.2.9 IR Personality Wiring

The XNX Universal Transmitter allows local programming and

congurationthroughthelocalLCDdisplayaswellasthrough

the HART protocol. Gas concentrations can be read at the

transmitter from Searchpoint Optima Plus or Searchline Excel,

via 4-20mA output as well as from the digital communication

connection on TB2 that can provide additional diagnostic

information. The gas concentration is taken from the digital

communication line as long as it is in agreement with the 4-20

mA output, otherwise the 4-20mA output takes precedence.

Caution: Dress the wires properly so that cabling does not contact

switches 1-4 on the back of the POD.

Thetransmitterprovidesa4-20mAoutputreectingtheinput

received. It also offers diagnostic information or data via HART

or any of the additional communication options offered.

Read Section 2.2

whichdenestheXNXpowerand4-20mA

output connections that are common to all personalities.

Warning: Power off the transmitter before changing S3 or S4. Both

switches must be set in either Source or Sink prior to applying power.

Caution: Do not force the POD into the enclosure. Doing so may

result in damage to the wiring or the POD or may alter the switch

settings. If resistance is felt, wires may be preventing the POD from

being properly positioned.

Do not adjust switch settings while power is applied to the

transmitter;doingsowillcausepermanentdamage.

Connecting a Searchpoint Optima Plus or Searchline Excel

Connections from the Searchpoint Optima Plus or Searchline

Excel to the transmitter are made via two pluggable terminal

blocks allowing ease of installation and service (see Figure

49). HA recommends that an 8” service length of wiring be

maintained.

Inremotemountcongurations,themaximumdistancebetween

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XNX Universal Transmitter Technical Manual - Page 48