Bracket
Mount with
Dimensions
NEMA 3R Enclosure
File #E83486
Covered by U.S. Patent #6,563,2371.
GM40 General Purpose
Multi-Voltage Commercial
Time Switch
INSTALLATION
1. Open door and then remove interior protective cover by releasing spring clip on bottom.
2. Remove timer mechanism by r
3. Select knockouts to be used. Remove inner 1/2” knockout by inserting a screwdriver in
the slot and carefully punch knockout loose. Remove slug. If 3/4” knockout is required,
remove the outer ring with pliers after removing the 1/2” knockout. Smooth edges with
knife if necessary.
4. Place enclosure in desired mounting location and mark the three mounting holes (refer to
diagram). Start by placing set screw on top and attaching enclosure over keyhole; then
screw in remaining two screws on bottom.
5. Connect conduit hubs to conduit before connecting the hubs to the enclosure. After
inserting hubs into enclosure, carefully tighten hub lock nut. Do not over-torque.
6. Verify input voltage selection. Refer to DIP switch diagram for desired input voltage.
7. Wire in accordance with National and Local Codes (see wiring diagrams).
8. Grounding: Terminate all ground wires to ground lug on bottom of enclosure.
9. Replace interior protective cover.
Note: For outdoor locations, raintight or wet location conduit hubs that comply with require-
ments of UL 514B (standard for fittings for conduit and outlet boxes) must be used.
eleasing spring clip on bottom.
Diagram not to scale.
All dimensions in inches.
ELECTRICAL RATINGS:
N.O. Contacts
40A Resistive @ 120~277VAC
1HP, 16FLA, 90LRA @ 120VAC
2HP, 12FLA, 52LRA @ 208~277VAC
30A Ballast @ 120VAC
20A Ballast @ 277VAC
15A Tungsten @ 120VAC
300VA Pilot Duty 120~240VAC
N.C. Contacts
30A Resistive @ 120~277VAC
1HP, 12FLA, 30LRA @ 120VAC
2HP, 10FLA, 30LRA @ 240VAC
2A Tungsten @ 120VAC
10A Ballast @ 277VAC
WIRING CONNECTIONS:
Screw box lug terminals
ENVIRONMENTAL RATINGS:
Operating Temperature Range:
–40°F to 131°F (–40°C to 55°C)
Operating Humidity: 0 to 95% non-condensing
ENCLOSURE DIMENSIONS:
8.795” x 6.631” x 2.935” (H x W x D)
SHIPPING WEIGHT: 2 lbs.
:
:
Interior
Protective
Cover
Step 1
INPUT VOLTAGE DIP SWITCH SETTING:
1.
Do not apply power to the GM40 prior to setting correct Input Voltage DIP switch.
2. Determine the input voltage which will be applied to the GM40 (i.e. L1 and L2/N terminals,
see wiring diagrams).
3.
Set the DIP Switch according to the diagram below.
120VAC
ON
4
ON
3
ON
2
ON
1
NOTE: Unit is shipped with DIP Switches set for 277VAC Input Voltage.
CAUTION: Do not check circuits by “sparking” wires to terminals. Damage to
the timer may r
esult.
208~240VAC
OFF
4
ON
3
OFF
2
ON
1
277VAC (Default)
4
3
2
1
Timer Mechanism
6-1/8”
2-1/2”
Step 2
Ground Lug
OFF
OFF
OFF
OFF
APPLICATION
he GM40 Multi-Volt Series Time Controls are universal,
T
electromechanical time switches which can be field configured for various power supply voltages. The voltage options
include 120VAC, 208/240VAC and 277VAC –all within the
ame unit! Selection of the desired supply voltage is easily
s
achieved by selecting the DIP to the corresponding input voltage as indicated on the printed circuit board assembly (refer
to “input voltage selection” on page 1). The mechanism is
ounted in a NEMA 3R outdoor enclosure and has been
m
design for the control of lighting, heating, air conditioning,
pumps, motors, or general electrical circuits in residential,
commercial, industrial and agricultural facilities. All GM40
odels are available as “Mechanism Only” (–M) for installation
m
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 synchronous drive. Input voltage shall be 120, 208/240 or 277VAC
selectable via simple to set DIP switch. All units shall incorporate both SPDT and DPDT contacts that shall be rated at 40A,
2 HP @ 277V. To set the starting time and to provide time indication, 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
witch shall have a quartz drive with 7 day reserve carry-over.
s
PROGRAMMING INSTRUCTIONS
SETTING THE TIME: Rotate the program dial gradually
lockwise until the day of the week (7 day) and time of day
c
on the outer dial is nearly aligned with the triangle marker at
2 o’clock position. Then set time to the minute by rotating
inute hand clockwise.CAUTION: Do not rotate dial or
m
minute hand counter-clockwise.
ROGRAMMING:The 24 hour model has trippers of 15
P
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
ay. Push the captive trippers outward for the time period(s)
d
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 permanently ON. In the lower position, “O”, the load is permanently 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.
NEW
Amber and Green
LED Lights Indicate
Power and Status
NEW
Easy Multi-Voltage
Field Adjustable
Switch for
DIP
120, 208/240,
C
or 277 V
NEW
New Compact
A
VALOX®NEMA 3R
Outdoor Enclosure
Replaces All Metal
Enclosures
NEW
Large Screw
Terminals for Easy Wiring
#8 AWG
NEW
Ground Lug Termination
GM40 – 120, 208/240, or 277 Volts – The only one to stock.
2
Captive Trippers
Can’t Be Lost
Independently
Adjustable Trippers at
15 Minute Intervals
Real-Time Clock Face
NO TOOLS REQUIRED!
Our “GUTS” simply snap
into existing Grasslin or
Intermatic enclosures
40 Amp Rated
Contacts
Moisture Resistant
Conformal Coated Board
File #E83486
Covered by U.S. Patent #6,563,237
NEW
NEW
NEW
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