The FM/1 digi 42 is a compact electronic 24 hour/7 day time
switch module, with heavy duty relay contacts for switching low or
line voltage loads. Applicable for time of day control of pumps, fans,
heaters, HVAC control circuits, lighting, machinery and many other
types of commercial, industrial, and agricultural equipment. All digi
42 models offer holiday programming.
All models feature large keys with unique “circular programming”
for easy programming, a large LCD display and battery backup.
TECHNICAL DATA:
Channels: 1
Programs: 42
Holiday program: Yes
Daylight time changeover: Automatic
Manual 3 way override: On-Auto-Off
Shortest switching time: 1 minute
Reserve carryover: 7 days
6 month reserve carryover: Optional
Input voltage models available: 12VDC
24VAC/DC
120VAC
208/240VAC
Switching output: SPDT relay
Switch ratings: 16A res. @ 277VAC
1000W Tungsten @ 250VAC
500W @ 125VAC
Input draw: 4VA
Input frequency: 50 or 60Hz
Wiring connections: 1/4” quick connects
Ambient temperature: –20°F to 140°F (–28°C to 60°C)
UL and Canadian UL recognized: File E83486
INSTALLATION & WIRING:
Note: Although the FM models contain some degree of spike and electrical
noise protection, as with all electronic devices, these units can be affected by
electrical noise. Therefore, it is recommended that they be powered from a
voltage source that has no switching devices or inductive loads connected.
1. Check the input and output ratings marked on the unit to make sure this
product is suitable for your supply voltage, load, and application.
2. Disconnect supply power prior to installation to prevent electrical shock.
3. Wire in accordance with National and Local electrical code requirements.
MOUNTING OPTIONS:
The standard FM/1 models may be surface mounted inside a panel or flush
mounted with FM-F mounting kit, available from Grasslin. Indoor NEMA 1
(E110 or E150), and outdoor NEMA 3R (E200) enclosures are available for
stand-alone mounting.
A mounting base (MB-FMPC) is available for printed circuit board mount-
ing. A clear plastic dust cover (DC-FME) is also available.
Models are also available with screw terminals and DIN rail mounting, or
for flush mounting with housing and clear cover. (Digi 42A & 42E)
FM/1 digi 42
One Channel Electronic Time Switch
Dimensions
Terminal Connections
M
LOAD
POWER
TIMER INTERNAL WIRING
COM
NO
NC
TIME
SWITCH
FIELD WIRING
1
2
3
4
5
FM/1 digi 42
