Symcom 50R-400-ALT Catalog Page
2880 North Plaza Drive • Rapid City, SD 57702
(800) 843-8848 • (605) 348-5580 • FAX (605) 348-5685
www.symcominc.com • email:sales@symcominc.com
Features
480 Volt inputs and
relay outputs eliminate
the need for a control
power transformer.
Bi-color LED indicates
the energized load.
Compatible with single
and dual float applications.
Debounce time delay
prevents nuisance tripping
caused by float switches.
Compact design saves
precious panel space.
Model
50R-400-ALT
•
Engineered
Protection
•
Microcontroller
Based
Additional features:
• UL listed
• Alternates between
two loads
• Solid-state reliability
• Compact size
• Debounce time delay
• Compatible with single
or dual float applications
• 600VAC control contacts
• 10 amp general purpose
relay rating
Model 50R-400-ALT alternating relays are used to alternate between two
loads, most commonly in duplex pumping and compressor applications to
balance the runtime of both loads.
When used in single float applications, the alternating relay changes state
after the float switch opens*, forcing the other pump to run the next time
the float closes.When used in dual float applications, the alternating relay
will allow both pumps to run simultaneously when the lead and lag floats
are both closed.
An adjustment knob provides the option to force one pump to run every
time the float switch is closed.This is helpful when one pump has been
removed for repair or for test purposes.
A built-in debounce feature prevents the alternating relay from changing
state if the float contact bounces momentarily.
* The alternating relay will not switch states while current is flowing. Switching will only occur after current has been
sensed, followed by loss of current for the duration of the debounce time delay.
03/05
2880 North Plaza Drive • Rapid City, SD 57702
(800) 843-8848 • (605) 348-5580 • FAX (605) 348-5685
www.symcominc.com • email:sales@symcominc.com
Supply V oltage ..................................432-528VAC
Supply Current ..................................40mA
Control Input Impedance (min) ........1MΩ
Contact Rating ..................................470VA @ 600VAC
General Purpose Relay Rating ........10A
Debounce Time Delay ......................1 second
Power Consumption ........................5 Watts (max)
Specifications
•
Operating Points
03/05
SymCom warrants its microprocessor-based products against defects in material or workmanship for a period of
five (5) years from the date of manufacture. All other products manufactured by SymCom shall be warranted
against defects in material and workmanship for a period of two (2) years from the date of manufacture.
For complete information on warranty, liability, terms, returns, and cancellations, please refer to the SymCom
Terms and Conditions of Sale document.
Model
50R-400-ALT
4.030" (102.36)
5.250" (133.35)
4.500" (114.30)
.375"
(9.53)
2.900"
(73.66)
CONTROL INPUT L1 L2
380-480 VAC, 1Ø, 50/60 HZ
P/N- MS50R-400-ALT
LOAD 1 = GREEN
LOAD 2 = RED
RUN
LIGHT
IND. CONT. EQ.
LISTED
784X
IND. CONT. EQ.
LISTED
784X
FORCE
LOAD 1
LOAD 1 LOAD 2
FORCE
LOAD 2
AUTO
PILOT DUTY RATING
470 VA @ 600 VAC
TOP
SIDE
WIRING DIAGRAM FOR
MODEL 50R-400-ALT
OL
OL
OL
L3
CONTROL INPUT L1 L2
L2
L1
PUMP 1
PUMP 2
OL
OL
OL
OL
OL
50R-400-ALT
INPUT POWER
M1
MAIN FLOAT
OPTIONAL
HIGH LEVEL
FLOAT
M2
M1
M2
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