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To access the connections on the terminal blocks, slide the plastic cover fitted over
them off.
Ensure the plastic terminal covers are fitted once wiring is complete.
6
After carrying out the procedures subsequently described close and secure the
Terminal Module Access Panel.
Caution Always ensure the cover is replaced/refitted after work is complete.
Power
Touchpoint 1 has an auto sensing power supply capable of operating between 85 and 265 Vac,
50/60 Hz mains supply, and/or 19 to 32 Vdc.
Honeywell Analytics recommend that the power to the controller is sourced from a locally fused
circuit. This should have an isolation facility for maintenance purposes. The table on page 17 and
the terminal block diagram following it show the wiring for power to Touchpoint 1.
Maximum power requirement for worst case detector and relays activated is 30 Wac and/or
15Wdc.
Touchpoint 1 can accept signals from three types of detector. The table summarizes the types
of detector compatible with the controller and the maximum power required.
Type of detector
2-wire 4-20 mA sink
3-wire 4-20 mA source 500 mA (18 to 32 Vdc)
3-wire mV bridge
Cabling
Touchpoint1 is designed for use in safe areas. Electrical installation should follow national
guidelines using suitably approved cable and glands (M20 or 3/4"NPT) or conduit (3/4"NPT).
Approved cable glands must accommodate a 360 degree termination of the EMI shield.
Screened 0.5mm² (20AWG) to 2.5mm² (14AWG) cross sectional area cable should be used
where appropriate to minimize unwanted effects from RF sources. 1.0mm² (16AWG) is
preferred. Solid or stranded cable may be used. Ensure the cable gland is installed correctly and
fully tightened. The enclosure has three knockouts in the base sized for both M20 and 3/4 in.
NPT fittings.
When running cabling to the unit consider conduit/cable weights to avoid any stress to the unit.
The subsequent diagrams show examples of how to earth-bond Steel Wired Armored (SWA)
cable at enclosures. The same principles apply to conduit installations. These bonding
techniques provide good RFI/EMC performance.
TP1MAN Issue 3 Apr 06 (MAN0630)
Maximum Power
500 mA (18 to 32 Vdc)
2.9-3.5 Vdc, 200 mA, 0.7 W
(max)
Recommended Detector
Sensepoint Toxic and Oxygen
Sensepoint Plus and Sensepoint Pro
Sensepoint Flammable
Installation
13
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