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APPLICATION
The GM40 Multi-Volt Series Time Controls are universal,
electromechanical time switches which can be field config-
ured for various power supply voltages. The voltage options
include 120VAC, 208/240VAC and 277VAC –all within the
same unit! Selection of the desired supply voltage is easily
achieved by selecting the DIP to the corresponding input volt-
age as indicated on the printed circuit board assembly (refer
to “input voltage selection” on page 1). The mechanism is
mounted in a NEMA 3R outdoor enclosure and has been
design for the control of lighting, heating, air conditioning,
pumps, motors, or general electrical circuits in residential,
commercial, industrial and agricultural facilities. All GM40
models are available as “Mechanism Only” (–M) for installation
in other enclosures or control panels or “Bracket Mount” (-B).
The GM40 is also available in a NEMA 1 Indoor Metal
Enclosure (-IM).
SPECIFIERS GUIDE
Furnish and install a Grasslin GM40 _ Multi-Volt Series 24 hour
or (7 day) time switch with captive trippers and quartz or syn-
chronous drive. Input voltage shall be 120, 208/240 or 277VAC
selectable via simple to set DIP switch. All units shall incorpo-
rate both SPDT and DPDT contacts that shall be rated at 40A,
2 HP @ 277V. To set the starting time and to provide time indi-
cation, the unit shall have an authentic clock face with hour
and minute hands. LED indicators shall provide Power and
Status feedback. Enclosure shall be NEMA 3R suitable for
both indoor or outdoor installation. Time switch shall contain
an OFF/AUTO/ON manual override. For Carry-over: The time
switch shall have a quartz drive with 7 day reserve carry-over.
PROGRAMMING INSTRUCTIONS
SETTING THE TIME:
Rotate the program dial gradually
clockwise until the day of the week (7 day) and time of day
on the outer dial is nearly aligned with the triangle marker at
2 o’clock position. Then set time to the minute by rotating
minute hand clockwise.CAUTION: Do not rotate dial or
minute hand counter-clockwise.
PROGRAMMING:
The 24 hour model has trippers of 15
minute increments, and an AM/PM indication on the outer
dial. The 7 day model has trippers of 2 hour increments. The
outer dial shows the 7 days of the week and AM/PM for each
day. Push the captive trippers outward for the time period(s)
that the load is to be on (Normally open contacts closed).
MANUAL OVERRIDE:
With the manual switch in the middle
position, the GM40 is in automatic mode and will switch at the
programmed times. In the upper position “I”, the load is per-
manently ON. In the lower position, “O”, the load is perma-
nently OFF.
BATTERY POWERED RESERVE
(Quartz Models):
In case of power failure, the built-in nickel-cadmium battery
maintains the time of day for 7 days. During power outage
relays are de-energized.
The GM40 is the only electromechanical general purpose time switch that offers multi-voltage selection,
SPDT and DPDT contacts, 40Amp rating, indoor and outdoor enclosure – all standard in one model.
NO TOOLS REQUIRED!
Our “GUTS” simply snap
into existing Grasslin or
Intermatic enclosures
Moisture Resistant
Conformal Coated Board
Ground Lug Termination
Amber and Green
LED Lights Indicate
Power and Status
Large Screw
Terminals for Easy Wiring
#8 AWG
40 Amp Rated
Contacts
Captive Trippers
Can’t Be Lost
Independently
Adjustable Trippers at
15 Minute Intervals
Real-Time Clock Face
New Compact
VALOX
®
NEMA 3R
Outdoor Enclosure
Replaces All Metal
Enclosures
GM40 – 120, 208/240, or 277 Volts – The only one to stock.
Easy Multi-Voltage
Field Adjustable
DIP Switch for
120, 208/240,
or 277 VAC
File #E83486
Covered by U.S. Patent #6,563,237
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