Time Delay Relays
Multifunction
TRU SERIES
Knob Adjustable UniversalTime Delay Relay
Description
TheTRU Series is a multifunction, knob adjustable, Universal
Time Delay Relay. It includes six of the most popular timing
functions selected by a slide switch. The time delay is knob
adjustable and the time delay range is switch selectable.
The repeat accuracy is + 0.1%. Both function and time range
can be selected on the top face of the unit. In addition to
multifunctioning and multiple time ranges, theTRU Series
features universal input voltage; 19 to 264VAC and 19 to 30VDC
and full 10A output relay. TheTRU Series can directly replace up
to 1000 competitive time delay relay models.
8-PIN
11-PIN
Operation
A six position slide switch selects delay-on-make, interval,
single shot, recycling (ON time first, equal recycle delays),
delay-on-break, and retriggerable single shot. 8-pin DPDT
base wiring is limited to delay-on-make, interval, and recycling
functions. All six functions are available in the 8-pin SPDT and
11-pin DPDT versions.
Wiring Diagram
8-PIN DPDT
Delay-on-Make
Interval
Recycling
L1
N/L2
8-PIN SPDT
Delay-on-Make
Interval
Single Shot
V = Voltage
S1 = Initiate Switch
Recycling
(ON Time First, Equal
Recycle Delays)
Delay-on-Break
Retriggerable Single Shot
Relay contacts
are isolated
Features & Benefits
L1
N/L2
FEATURES
BENEFITS
11-PIN DPDT
Repeat Accuracy + / - 0.1% or + / - 20ms, whichever
is greater
Microcontroller based
Delay-on-Make
Interval
Single Shot
6 time ranges
(0.1s to 1,000m)
Broad range will satisfy most requirements
Recycling
(ON Time First, Equal
Recycle Delays)
Delay-on-Break
Retriggerable Single Shot
Knob adjustable
time delay
Allows user to fine tune time delay based on
application needs
L1
N/L2
Universal input voltage
Makes it versatile for use in most applications
Provides the most common standard
timing functions
Multifunction
Provide visual indication of input voltage and
relay status
LED Indicators
10A isolated
output contacts
Allows control of loads for AC or DC voltages
Ordering Information
MODEL
INPUT VOLTAGE
BASE WIRING
FUNCTIONS
TRU1
TRU2
TRU3
19 to 264VAC; 19 to 30VDC
19 to 264VAC; 19 to 30VDC
19 to 264VAC; 19 to 30VDC
8-pin DPDT
8-pin SPDT
11-pin DPDT
3
6
6
If you don’t find the part you need, call us for a custom product 800-843-8848
© 2018 Littelfuse Protection Relays & Controls
www.littelfuse.com/tru
Rev: 1-A-032318