Engineering Documentation

Chapter 3 – Field Panels
TX-I/O Product Range
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TX-I/O Product Range
Wire Type Requirements
TX-I/O Wire Type Requirements.
Circuit Type Class Wire Type Maximum Distance
1
Conduit Sharing
2)
AC Line Power (120V or
greater) to transformer
1 No. 12 to No. 14 AWG THHN See NEC and PX Series
Service Boxes [
➙
81]
Check local codes
Universal Input/Output 2
No.18 to No.22 AWG, TP
3)
or TSP
4
CM (FT4) or
CMP (FT6)
3)
750 ft (230 m)
1)
Check local codes
Low Voltage Input/Output
on SCS (Basic Link)
2 24 AWG UTP
5)
, solid 4 pair unshielded 295 ft (90 m)
1)
Check local codes
Low Voltage Input/Output
on SCS (Patch Cables)
2 24 AWG UTP
5)
, stranded 4 pair unshielded 33 ft (10 m)
1)
Check local codes
Dedicated Digital Input 2
No.14 to No.22 AWG.
TP not required below 1 Hz. at faster pulse
speeds, use TP or TSP
4)
; check job
specifications and local codes.
750 ft (230 m) Check local codes
Digital Output 1, 2
No.14 to No.22 AWG.
TP not required; check job specifications and
local codes.
Check local codes Check local codes
TX-I/O Island Bus
Low voltage AC, low voltage
DC, and communication
inside low voltage enclosure.
2 No. 14 or 16 AWG, 2 Twisted Pair (TP) 10 ft (3 m) N/A
TX-I/O Island Bus
Low voltage AC, low voltage
DC, and communication
between enclosures or
inside high voltage
enclosures
7)
.
2 1 Twisted Shielded Pair (TSP)
+ 1 Twisted Shielded 3C (Triad)
-or- 1 Twisted Shielded 4C, No. 14 AWG or
16 AWG
164 ft (50m)
6)
Check local codes
TX-I/O Island Bus
Expansion Communication
and Power
2 24 AWG 1.5-pair (1 TP & 1 Conductor) with
overall shield and drain wire.
24 AWG Low Cap Twisted shielded pair (TSP).
2 × 200 ft (61 m) Check local codes
1)
Wire length affects point intercept entry. Adjust intercept accordingly.
2)
Conduit sharing rules: No Class 2 point wiring can share conduit with any Class 1 wiring except where local codes permit. (Both Class
1 and Class 2 wiring can be run in the field panel providing the Class 2 wire is UL listed 300V 75°C (167°F) or higher, or the Class 2
wire is NEC type CM (FT4) (75°C or higher) or CMP (FT6) (75°C or higher). NEC type CL2 and CL2P is not acceptable unless UL
listed and marked 300V 75°C (167°F) or higher.
3)
Twisted pair, non-jacketed, UL listed 75°C (167°F) and 300V cable can be used in place of CM (FT4) or CMP (FT6) (both must be
rated 75°C or higher) cable when contained in conduit per local codes. See the Field Purchasing Guide for wire.
4)
Twisted Shielded Pair TSP is not required for general installation, does not affect TXIO Module specifications, and may be substituted
where otherwise specified. TSP should be used in areas of high electrical noise (for example when in proximity to VFDs and other large
motors). Where used, connect the shield drain wire to the grounding system inside enclosure.
5)
Cable must be part of a Structured Cabling System (SCS).
6)
Maximum distance is total of all cable on the TX-I/O island bus for 14 AWG four conductor cable. See the formulas in this section for
associated maximum power and maximum distance for each wire type.
7)
See TX-I/O Island Bus Guidelines [
➙
91] in this section for cable configuration.