© 2018 Littelfuse Protection Relays & Controls
www.littelfuse.com/
Rev: 1-A-032318
Time Delay Relays
Multifunction
www.littelfuse.com/www.littelfuse.com/tru
TRU SERIES
Accessories
BZ1 Front Panel Mount Kit
Provides an easy method of through-the-panel
mounting of 8- or 11-pin plug-in timers, flashers,
and other controls.
NDS-8 Octal 8-pin Socket
8-pin 35mm DIN rail or surface mount. Rated
at 10A @ 300VAC. Surface mounted with two
#6 (M 3.5 x 0.6) screws or snaps onto a 35 mm
DIN rail. Uses PSC8 hold-down clips.
NDS-11 11-pin Socket
11-pin 35mm DIN rail or surface mount. Rated
at 10A @ 300VAC. Surface mounted with two
#6 (M 3.5 x 0.6) screws or snaps onto a 35 mm
DIN rail. Uses PSC11 hold-down clips.
PSC8 or PSC11 Hold-down Clips
Securely mounts plug-in controls in any position.
Provides protection against vibration. Use PSC8
with NDS-8 Octal Socket or PSC11 with NDS-11
Socket. Sold in pairs.
Function Diagram
RETRIGGERABLE SINGLE SHOT
(MOTION DETECTOR) (PSD)
S1 = Initiate Switch
NO = Normally
Open Contact
NC = Normally
Closed Contact
t = Incomplete
Time Delay
TD = Time Delay
R = Reset
Specifications
Time Delay
Type Digital integrated circuitry
Range
Switch Selectable 0.1s - 1000m in 6 ranges:
1) 0.1 - 10s
2) 1 - 100s
3) 10 - 1000s
4) 0.1 - 10m
5) 1 - 100m
6) 10 - 1000m
Adjustments
Multiplier 4 position DIP switch selects
x0.1, x1, x10, and sec. or min.
Time Setting Onboard knob adjustment with 1 - 100
reference dial
Two LEDs indicate 1) Input voltage applied
2) Output relay status
Repeat Accuracy ±0.1% or ±20ms, whichever is greater
Reset Time ≤ 300ms
Time Delay vs Temp.
& Voltage ±2%
Input
Voltage - Universal
Input Range 19 to 264VAC and 19 to 30VDC
AC Line Frequency 50/60Hz
Output
Type Electromechanical relay
Form SPDT or DPDT, isolated
Rating 10A resistive @ 120/240VAC & 28VDC;
1/3 hp @ 120/240VAC
Life Mechanical - 1 x 10
7
; Electrical - 1 x 10
6
Protection
Transient 38 joules
Isolation Voltage ≥ 1500V RMS input to output
Polarity DC units are reversed polarity protected
Mechanical
Mounting Plug-in socket
Dimensions H 87.3 mm (3.44”); W 60.7 mm (2.39”);
D 45.2 mm (1.78”)
Termination Octal 8-pin plug-in or magnal 11-pin plug-in
Environmental
Operating/Storage
Temperature -20° to 65°C / -30° to 85°C
Weight ≅ 6 oz (170 g)
Disclaimer Notice – Information furnished is believed to be accurate and reliable. However, users should independently evaluate the suitability of and test each product selected for their own applications. Littelfuse products
are not designed for, and may not be used in, all applications. Read complete Disclaimer Notice at www.littelfuse.com/product-disclaimer.
