Digi 42/2
Two Circuit Electronic
24 Hour or 7 Day Time Switch
Operating Instructions
APPLICATION
Time based control of lighting, ventilating, heating,
cooling or other electrical loads in commercial and
industrial applications. The Digi 42 time switches are
programmable for 24-hour or 7-day schedules as well
as a “8th day” or holiday schedule.
TECHNICAL DATA
Output–2 SPDT relays with dry contacts
Switch Rating:
16A/250VAC general purpose
1000 watt tungsten @ 240V
500 watt @ 120V
1/2 hp @ 120VAC, 1 hp @ 240VAC
720VA pilot duty
2 week battery back-up
Supply voltages: Separate Models – 24VAC/DC,
120VAC, 208/240VAC, all 50/60Hz (refer to prod-
uct label)
Shortest switch time–1 minute
Ambient Temperature Range –20°F to 140°F
(–28°C to 60°C)
AM/PM LCD display or 24:00 hr. military display
Input Power: 4VA
Screw terminal connections for up to #12AWG wire
Accuracy ± 4 minutes per year
Daylight time changeover: manual or automatic
NOTE:
When first applying power, it may take several
minutes for the battery to take a charge. If the LCD
display does not come on after a few minutes, press
reset.
Installation
To the installer:
1. Read operating instructions carefully.
2. Check the input and output ratings marked on the unit to
make sure this product is suitable for your power supply
and application.
3. Disconnect power supply prior to installation to prevent
electrical shock.
4. Wire in accordance with National and Local electrical code
requirements.
The Digi 42 time switch can be surface, flush or rail mounted
and is also available with an enclosure for stand-alone applica-
tions (GMX2).
MOUNTING
Lift off front cover and loosen the two screws on opposite
corners. Pull off plug-in base with a left-to-right rolling motion.
SURFACE MOUNTING (inside panel)
Place screws through holes in base and screw to back of
panel or wall. Connect wires to wiring terminals.
Place terminal cover over terminal block and, by lining up the
two screws with corner holes in base, push timer firmly onto
plug-in base. Tighten the two screws. A base for DIN rail mount-
ing is also available as an option. Order Part No. MB-DIN.
PANEL MOUNTING (flush mounting through panel door)
Cut a square hole 2-5/8” x 2-5/8” (66 x 66mm) in the front
of the panel. Remove plug-in base and insert the time switch
through the opening. Place the flush mounting bracket over
rear of the unit to secure to the panel door.
For stand-alone installations, the unit may be surface
mounted inside an E100 indoor or E200 outdoor enclosure
which is available from Grasslin Controls Corporation or your
wholesaler.
WIRING
1. Wire power to input terminals 1 and 2 (
make sure to apply
correct voltage; use of incorrect voltage will void warranty).
2. Wire power to circuit 1 and 2 common terminals. Wire NO
(closed during ON times) or NC (open during ON times) to
the load.
Circuit 1
Circuit 2
COM
COM
