Cabling Requirements; Ac Mains Voltage Power Cables; Dc Power Cables; Field Device Cables - Honeywell Touchpoint Plus Wireless Technical Handbook

MAN0984_Iss 2_09/19
3020M5001_2
Electrical Power And Interfacing

5.2 Cabling Requirements

All cabling shall be appropriately rated and approved in accordance with national and local regulations.
Additionally, cabling must satisfy the requirements defined in the manuals of connected field devices,
Signal cables should be shielded to avoid spurious signals, and shall be bonded to protective earth (Ground).

5.2.1 AC Mains Voltage Power Cables

Use a properly rated AC power (mains) cable, certified and installed in accordance with local and national
regulations. The Touchpoint Plus Wireless terminals will accept only copper wire sizes in the range
0.4 – 4 mm (solid core), 0.4 – 3 mm
2
be torqued to 11.9 lb-in (1.35 N-m), modules are 4.4 lb-in (0.5 N-m).

5.2.2 DC Power Cables

Use a properly rated DC power (mains) cable, certified and installed in accordance with local and national
regulations. The Touchpoint Plus Wireless terminals will accept only copper wire sizes in the range
0.9 – 3.3 mm (solid core), 0.9 – 3.3 mm
2
should be torqued to 4.4 lb-in (0.5 N-m).

5.2.3 Field Device Cables

Field Device cabling (sensors, lights, solenoids, etc.) should be appropriate to the zone classification, and in
accordance with the device manufacturer's recommendations. Refer to local and national regulations where
appropriate, and to the device user manual.
All sensor field cables must be screened and earthed (grounded) in order to:
•
ensure correct operation of the system
•
avoid spurious signals
•
provide lightning protection
•
Meet European Standards for RFI and EMC.
The I/O modules will accept only copper wire sizes to a maximum of 2 mm² or 14 – 30 AWG, with the
terminals torqued to 4.4 lb-in (0.5 N-m).
Ensure that the maximum loop resistance is not exceeded, as specified by the device manufacturer.
Ensure that the correct power level is present at the field device, as specified by the device manufacturer, and
does not exceed TPPLW supply limit of 15W per channel individually or 40 / 68 W in total. (See the notes
under 5.2.5 Main Module Connections for more details about power consumption and availability.)
I.e. if a device's supply requirement is 24 VDC 0.5 A, then the power requirement is 24 V x 0.5 A (V x I) =
12 W. If you use 240 m of AWG 22 cable (R = 0.05 Ω/m), the power line dissipation is 0.05 Ω/m x 240 m x
0.5 2 A (R x I 2 ) = 3 W. Therefore the total power requirement is 15 W (12 + 3).
You should also test the cable resistance in situ as its
particularly if the field device is certified for use in a hazardous location.
Care must be taken to avoid Ground feedback loops.
(stranded core), or 22 – 12 AWG (> 80 C). The mains terminals should
2
(stranded core), or 18 – 12 AWG (> 80 °C). The mains terminals
2
WARNING
Ω / will increase in line with T
m
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Touchpoint Plus Wireless
Technical Handbook
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