Instruction Manual
Time Delay Switch-Two Wire
CAT XLTD770/1 & TD170/1
1 Specifications (at 25°C)
2 Features
Supply voltage 230-240V a.c. 50Hz
Selectable time delay 1, 3 or 10 minutes
Max and min load See table below
Weatherproof rating IP56 (TD170/1 only)
Operating temperature 0 to 50°C
Tube Size Effective Load Tube Size Effective Load
1 x 15W 85VA 1 x 65W 170VA
1 x 20W 85VA 1 x 80W 210VA
1 x 30W 85VA 2 x 20W 185VA
1 x 40W 105VA 2 x 40W 210VA
Load type Min Load Max Load
Incandescent and
240V linear halogen
20W 600W
240V GU10 halogen downlights Not suitable*
Compact uorescent 150W** 600W
Linear uorescent
(Electronic ballast)
150W** 600W
Linear uorescent
(Magnetic ballast with power
factor correction)
40W*** 600W***
Linear uorescent
(Magnetic ballast without power
factor correction)
100VA**** 600VA****
Low voltage halogen
(Electronic transformer)
20W 600W
Low voltage halogen
(Magnetic transformer)
20W 480W
Fan motor 20VA 600VA
* GU10 240V halogen downlights can damage the time delay switch when they fail, and are therefore not recommended for use with
this product.
** Compact and linear uorescent lamps may icker in the “off” state if the minimum load requirement is not satised. A minimum
load of 10W can be achieved if a resistive load is connected in parallel with the uorescent load. This can be, for example, a resistor
or incandescent lamp rated at least 10W.
*** Power factor correction capacitors must be placed on the line side of the time delay switch. If this is not possible then they should
either be removed, or a 36W magnetic ballast should be connected in parallel with the uorescent load, to prevent damage to the
time delay switch.
**** Refer to the following table for VA ratings when power factor correction is not used:
• Selectable time delay
Choose from a 1, 3 or 10 minute delay period
using the switch on the back of the unit.
• Direct replacement for pneumatic switches
No change in wiring is required.
• Multiple push buttons
Connect NX770M remote push buttons
as shown in the wiring diagram to enable
switching from several locations.
• Illuminated push button
Push button glows red when unit is off, so
that it can easily be located in the dark. Not
available for remote push buttons.
• Weatherproof (TD170/1 only)
Rated IP56.
• Ease of installation
XLTD770/1 and TD170/1 fit all standard
mounting accessories.
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