SWUDC
… Solid state CMOS digital circuitry
Series
TDR
Timing Mode:
The SWUDC Series time delay relay operates in any one of four timing modes, user
selected by means of 2 sections (S8, S9) of a 9 position Dip Switch (the other 7 sections
control timing). These modes are as follows: Delay on operate, delay on release, delay on
operate and release, interval or one-shot. An external switch may be used to provide
trigger control of the time delay cycle.
Timing Diagrams & Modes:
Delay On Operate:
Two operation methods:
1) With external switch closed: delay on operate timing cycle begins upon application of
input power. The relay contacts transfer at the end of the delay period and will remain
transferred until input voltage is removed. Reset occurs when input voltage is removed.
2) With external switch open: delay on operate timing cycle begins after the application
of input power and the closure of the external switch. Upon switch closure the relay
contacts transfer at the end of the delay period and will remain transferred until the input
voltage is removed. Reset occurs when input voltage is removed.
… Four timing modes: Delay on operate; delay on release;
delay on operate & release; and interval or one-shot
… DPDT (2 form C) isolated 10 ampere relay contacts
… Timing selection: Binary coded Dip Switch with knob
adjustable potentiometer
… User selectable timing ranges covering 0.1 secs. to 77.5
hours.
… UL File #E96739 (M)
… CSA File #LR62586
Delay On Release:
Two operation methods:
1) With external switch closed: Upon application of input voltage relay contacts transfer
immediately. The timing cycle will begin when the external switch is opened. When the
timing cycle is completed the relay contacts will release. The timing cycle may be reset to
zero during the timing cycle by closing the external switch.
2) With external switch open: Upon application of input voltage and the closure of the
external switch the relay contacts transfer immediately. The timing cycle will begin when
the external switch is opened. When the timing cycle is completed the relay contacts will
release. The timing cycle may be reset to zero during the timing cycle by closing the
external switch.
Delay On Operate and Release:
With the external switch open input voltage is applied. With the closure of the external
switch the delay on operate timing cycle begins and the relay contacts will transfer at the
end of the delay period. With the re-opening of the external switch the delay on release
timing cycle will begin and the relay contacts will transfer at the end of the delay period.
Interval or One-shot:
With the external switch closed input power is applied. The relay contacts transfer
immediately and the interval or one-shot timing cycle begins. When the timing cycle is
completed the relay contacts will release. The timing cycle may be reset to zero during
the timing cycle by removing input power.
Outline Dimensions:
Contact Information:
Arrangement: 2 form C (DPDT) - Diagram C
Contact Material: Silver - Cadmium Oxide
Rating (Resistive): 10A @ 240V AC Resistive, 15A @ 30V DC Resistive, 15A @ 120V
AC Resistive, 1/3 HP @ 120V AC, 1/2 HP @ 250V AC
Expected Life @ 25°C: 10 Million operations, Mechanical 100,000 operations minimum
at rated loads.
Environmental Information:
Temperature Range: Storage: -60°C to +105°C (-76°F to +221°F) Operating: -45°C to
+70°C (-49°F to +158°F)
Mechanical Information:
Termination: 11-pin Octal Style Plug or 11-pin spade terminals. (Diagram C&D).
Enclosure: White plastic case with a dial scale for knob adjustment, reference only.
LSWUDC version has a black case.
Weight: 4 oz (114g) approx.
Initial Dielectric Strength:
Between open contacts: 1000V RMS, Between adjacent contacts: 1500V RMS, Between
contacts & coil: 1500V RMS.
Input Information:
Voltage: 12V - AC or DC, 24V - AC or DC, 48V DC, 110V DC, 120V AC. Other
voltages available.
Power Requirement: AC inputs: 3 VA or less, DC inputs: 3 Watts or less.
Transient Protection: 1 JOULE MOV
Polarity Protection: On DC inputs - Yes
Input Voltages & Limits:
Nominal Minimum
12V AC 10V 14V
24V AC 20V 28V
120V AC
12V DC 11V 14V
24V DC 20V 32V
105V 130V
Maximum
48V DC 41V 55V
110V DC
95V 125V
Wiring Diagrams:
Time Delay Selection Procedure:
The SWUDC has four basic timing ranges selectable by means of two sections of a Dip
Switch (S1 & S2). These ranges represent a starting point from which the user, utilizing
Dip Switch positions S3 - S7, customizes narrower timing range to suit his/her timing
application. This custom timing range is knob adjustable with a 5:1 vernier control.
How To Select A Time Delay:
1) Determining The Appropriate Timing Range
Set Dip Switch positions S1 & S2 as follows for the four basic timing ranges.
Time Delay Range
A: .1 sec. to 15.5 secs. On On
B: 10 secs. to 25 mins. Off On
C: 10 mins. to 25 hrs. On Off
D: 30 mins. to 77.5 hrs. Off On
*Choose the range which most narrowly incorporates the time delay you desire. e.g. for
180 secs. Choose range B and set S1 to Off and S2 to On.
2) Calculating The Multiplier For The Desired Time Delay
Dip Switch positions S3 - S7 are used to set the multiplier which will customize your
time delay range. The values for these settings are as follows:
Switch Position
Multiplier Value
Switch Position
S1 S2
S3 16
S4 8
S5 4
S6 2
S7 1
Total = 31
The Formula
Once you have chosen the appropriate basic timing range, perform the following
calculations - (to clarify the steps use the desired time delay of 180 secs. as an example):
A) For 180 seconds select range B (10 secs. to 25 mins.).
B) Divide the desired time delay (180 secs.) by the minimum time of the selected range.
(minimum time in range B is 10 secs.) 180/10 = 18. Always convert to the same time
units (min., sec., hrs.) when dividing.
C) The multiplier is equal to 1/2 of this quotient - 180/10 = 18. 18/2 = 9, therefore the
multiplier for 180 seconds is 9 and the user must set switches S3- S7 as follows:
Switch Position
S3 16 Off
S4 8 On
S5 4 Off 8
S6 2 Off
S7 1 On 1
Multiplier = 9
Multiplier Value Selected:
*Select the on positions which add up to the multiplier.
The multiplier is always the closest number equal to half the quotient. This formula will
give you a 5:1 vernier knob adjustable timing range with the user desired time delay as
the middle of the timing range. The approximate maximum of any timing range the user
selects is always 2x the desired timing e.g. 2 x 180 = 360 secs. The maximum of the
selected range will be 360 secs. To determine the approximate minimum setting of the
timing range, simply divide the maximum setting by 5. e.g. 360/5 = 72 secs. Therefore, as
per our example, to get a time delay of 180 secs the switch positions will be as follows:
S1 S2 S3 S4 S5 S6 S7
Off On Off On Off Off On
User will have a time delay range of 72 secs - 360 secs.
SWUDC Timing Mode Operating Instructions:
The Amperite SWUDC Time Delay Relay operates in any one of four modes. These are
user selectable by means of setting S8 and S9 of the nine positions Dip Switch. The
modes and switch positions are as follows:
Mode
Switch Position
S8 S9
Delay on operate Off On
Delay on release On Off
Delay on operate and release Off Off
Interval or One-shot On On
Operating procedure for each mode:
The following is a thumbnail sketch of each mode and its operation.
Delay On Operate:
Two Methods
1) Closed External Switch. Apply power. Relay contacts transfer after time delay.
2) Open External Switch. Apply power. Close external switch Delay time starts after
switch is closed and relay contacts transfer at the end of the delay time.
Delay On Release:
Two Methods
1) Closed External Switch. Apply power. Relay contacts transfer immediately. Open
external switch. Time delay begins, and relay contacts release after delay is completed.
2) Open External Switch. Apply power. Close external switch. Relay contacts transfer.
Open external switch to start time delay. Relay contacts release after completion of time
delay.
Delay On Operate and Release:
Open External Switch. Apply power. Close external switch. Delay on operate time delay
starts and relay contacts transfer at the end of the delay time. Open external switch. Delay
on release time delay starts and relay contacts release after completion of the delay time.
Interval or one-shot:
Close External Switch. Apply power. Relay contacts transfer immediately. At the end of
the delay time the relay contacts release.
Ordering Information:
Definition of a part number for the Amperite SWUDC Series Time Delay Relay.
Example:
A: Denotes nominal input voltage. Voltages Available: 12V - AC or DC, 24V - AC or
DC, 48V DC, 110V DC, 120V AC. Custom Voltages are available.
B: For custom voltages only - denotes type of input current required for operation: A =
AC - Alternating Current, D = DC - Direct Current
C: Enter "L" if optional 11-pin spade terminals are required, (Diagrams B & D).
D: Denotes DPDT (2 form C) 10 ampere CMOS four timing mode SWUDC Series Time
Delay Relay with binary coded nine position Dip Switch & built in potentiometer.
Solving Your Timing Requirements Since 1922
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