Intermatic FM/1 digi 20 Operating Instructions Manual

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FM/1 digi 20
One Channel Electronic
Time Switch
The FM/1 digi 20 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.
The FM/1 digi 20 features large keys with unique "circular
pattern" for easy programming, an easy-to-read LCD display
and capacitor backup to retain program memory during
power outages.
TECHNICAL DATA:
Channels: 1 (SPDT)
Programs: 20
Holiday Program: No
Daylight time changeover: Manual
Manual 3 way override:
On-Auto-Off
Shortest switching time:
1 minute
Reserve carryover: 5 days
SPECIFICATIONS:
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/1 models contain some
degree of spike and electrical noise protection, as
with all electronic devices, these units can be affect-
ed 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. Install in accordance with all applicable
National and Local electrical code requirements.
MOUNTING OPTIONS:
The standard FM/1 models may be surface
mounted inside a panel or flush mounted with MK-
FM mounting kit. Indoor NEMA 1, and outdoor NEMA
3R enclosures are available for stand-alone mount-
ing. Consult Intermatic catalog or price sheet for var-
ious options.
A mounting base (MB-FMPC) is available for
printed circuit board mounting. A clear plastic dust
cover (DC-FM) is also available.
Models are also available with screw terminals
and DIN rail mounting, or for flush mounting with
housing and clear cover. (Digi 20A & Digi 20E)
Input voltage models
available:
24VAC/DC; 120VAC;
208/240VAC
Switching output: SPDT relay
Switch ratings:
16A res. @ 277VAC
1000W Tungsten @ 250VAC;
500W @ 125VAC
FM/1 Digi 20
M
1
L1
Dimensions
Terminal Connections
Typical Wiring (120VAC Application)
FM/1 Digi 20
COM NO NC
2 3 4 5
Normally Open
(Dry Contact)
L2/N
Normally Closed
(Dry Contact)
Typical Wiring (24VDC Application)
FM/1 Digi 20
M
COM
1 2 3
24VDC
(+) (–)
M
COM NO NC
1 2 3 4 5
LOAD
120VAC
Hot Neutral
NO NC
4 5
LOAD