XNX Universal Transmitter Quick Start Guide
19
Allowable Cable Lengths for Various Capacitances
(for 1 mm, #18 AWG shielded twisted pair)
Cable Capacitance
Number of
Network
Devices
20 pf/ft
(65
pf/m)
30 pf/ft
(95
pf/m)
50 pf/ft
(160
pf/m)
70 pf/ft
(225
pf/m)
Allowable
Lengths
9,000 ft
(2,769 m)
6,500 ft
(2,000 m)
4,200 ft
(1,292 m)
3,200 ft
(985 m)
1
8,000 ft
(2,462 m)
5,900 ft
(1,815 m)
3,700 ft
(1,138 m)
2,900 ft
(892 m)
5
7,000 ft
(2,154 m)
5,200 ft
(1,600 m)
3,300 ft
(1,015 m)
2,500 ft
769 m)
10
6,000 ft
(1,846 m)
4,600 ft
(1,415 m)
2,900 ft
(892 m)
2,300 ft
(708 m)
15
NOTE:
See Appendix A of the XNX Technical Manual for more information about
the Local HART
®
Handheld.
4.5 Terminal Block Connections
Customer connections to the XNX are made via pluggable terminal blocks
secured to the back of the POD. The terminal blocks are keyed and polarized. A
color coded label is affixed to assist in wiring when the block is removed from the
POD.
The terminals are suitable for use with 12 to 28 AWG or 0.8 to 2.5mm wire. Wire
insulation must be stripped 5/16 (0.312) inches or 8mm. Tighten each terminal to
a maximum of 4.5 in/lbs. Up to four terminal blocks will be supplied; each will be
configured with 2, 6, 9, or 10 positions.
Two terminal block jumpers are provided to provide an electrical connection
without connecting to the Personality Board. Install the jumpers between pins 1
and 2 and between pins 3 and 4 to support multi-node wiring.
For user convenience, a second set of terminals has been provided to eliminate
the need for a secondary junction box in multi-node systems. Two terminal block
jumpers are provided which enable an electrical connection without connecting to
the Personality Board. Install the jumpers between pins 1 and 2 and between pins
3 and 4 to support multi-node wiring.
NOTE:
Pins 2 and 4 of terminal block TB1 have no internal connection on the
personality board. When used in conjunction with the terminal block
jumpers, pins 2 and 4 can provide additional 4-20mA connections or
power feed for daisy-chained units.
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