Cabling And Connection Requirements - Honeywell Touchpoint Plus Technical Handbook

System Electrical Installation

5.2 Cabling and Connection 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, particularly
Signal cables should be shielded to avoid spurious signals, and shall be bonded to protective earth (Ground).
All external cables should be fitted through appropriate glands to preserve the IP rating.
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 terminals will accept only copper wire sizes in the range 0.4 – 4 mm
core), or 21 – 12 AWG (T
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 terminals will accept only sizes 0.9 – 3.3 mm
>80 °C). The mains terminals should be torqued to 0.5 Nm (4.4 lb-in).
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's 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
0.5 Nm (4.4 lb-in).
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 the TPPL 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.)
E.g. 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 240m of AWG 22 cable (R = 0.05 Ω/m), the power line dissipation is 0.05 Ω/m x 240m x 0.5
Therefore the total power requirement is 15 W (12 + 3).
You should also test the cable resistance in situ as its actual resistance is relative to T
end of line (EOL) resistance).
MAN0984_Iss 3_02/16
Pt. No. 3011M5001_3
if the field device is certified for use in a hazardous location.
Care must be taken to avoid Ground feedback loops.
>80 °C). The mains terminals should be torqued to 1.35 Nm (11.9 lb-in).
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WARNINGS
2
(solid or stranded copper cores), or 18 – 12 AWG (T
28
2 2
(solid core), 0.4 – 3 mm (stranded
2 2
A (R x I ) = 3 W.
(taking into account any added
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Touchpoint Plus
Technical Handbook
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