Time Delay Relays
Dedicated - Delay-on-Break
HRPS / HRIS SERIES
Description
The HRPS/HRIS Series combines an electromechanical relay
output with microcontroller timing circuitry. It is a factory
programmed module available in any 1 of 13 standard functions.
It offers 12 to 240V operation in two universal ranges and factory
fixed, onboard, or external adjustable time delays with a repeat
accuracy of 0.ꢀ5. The output contact rating allows for direct
operation of heavy loads, such as compressors, pumps, blower
motors, heaters, etc. This series is ideal for OEM applications
where cost is a factor. The HRPS has non-isolated SPDT relay
contacts, and the HRIS has isolated SPDT relay contacts. Both
offer the most popular timer functions in the industry.
Operation (Interval)
Upon application of input voltage, the time delay begins. The
output (relay or solid state) energizes during the time delay. At
the end of time delay the output de-energizes and remains
de-energized until input voltage is removed.
Wiring Diagram
L1
N/L2
HRPS
Reset: Removing input voltage resets the time delay and output.
Relay contacts are
non-isolated.
Features & Benefits
S1 = Initiate Switch
FEATURES
BENEFITS
UTL = Untimed Load (optional)
NO = Normally Open
NC = Normally Closed
C = Common
Repeat Accuracy + / - 0.5% ,
factory calibration +/- 2%
Microcontroller based
Compact design
Allows flexiblility for OEM applications
Allows for direct operation of heavy loads
Protects against shock, vibration, and humidity
A knob, or terminals 4 & 5 are
only included on adjustable
units. RT is used when external
adjustment is ordered.
30A, SPDT, Normally
Open output contacts
Encapsulated
L1
N/L2
HRIS
Relay contacts
are isolated.
Ordering Information
S1 = Initiate Switch
TIME
MODEL
INPUT VOLTAGE
ADJUST.
FUNCTION
UTL = Untimed Load (optional)
NO = Normally Open
NC = Normally Closed
C = Common
DELAY
HRISW21FT 24 - 240VAC/24 - 110VDC Onboard 0.1 - 10s Alternating
HRISW27I 24 - 240VAC/24 - 110VDC Onboard 0.1 - 10h Interval
HRPSD12HI 12 - 48VDC
Fixed
2h
Interval
A knob, or terminals 4 & 5 are
only included on adjustable
units. RT is used when external
adjustment is ordered.
Delay on
break
HRISW25B 24 - 240VAC/24 - 110VDC Onboard 1 - 100m
If you don’t find the part you need, call us for a custom product 800-843-8848
© 2016 Littelfuse Protection Relays & Controls
www.littelfuse.com/hrps-hris
Rev: 1-A-062216