Dold Monitoring Relay, SPDT, DIN Rail, DC 12, 24, 48 V, 115 V ac, 230 V ac

RS Stock No.:: 181-2792
Mfr. Part No.:: MK9143N.38 +/-5Hz UH=AC230V tv=0-20s tan=0-30s
Manufacturer:: Dold

Dold Monitoring Relay, SPDT, DIN Rail, DC 12, 24, 48 V, 115 V ac, 230 V ac

Subtotal (1 unit)*

SGD414.94

(exc. GST)

SGD452.28

(inc. GST)

FREE delivery for orders over $150, or create a business account to enjoy free delivery from just $28

Temporarily out of stock

Shipping from 06 April 2026

Need more? Click ‘Check delivery dates’ to find extra stock and lead times.

Units	Per unit
1 +	SGD414.94

*price indicative

RS Stock No.:: 181-2792
Mfr. Part No.:: MK9143N.38 +/-5Hz UH=AC230V tv=0-20s tan=0-30s
Manufacturer:: Dold

Specifications

Technical data sheets

Legislation and Compliance

Product Details

Find similar products by selecting one or more attributes.

Select all	Attribute	Value
	Brand	Dold
	Product Type	Monitoring Relay
	Contact Configuration	SPDT
	Mount Type	DIN Rail
	Terminal Type	Screw
	IP Rating	IP40, IP20
	Time Delay	0 to 20 s, 0 to 30s
	Supply AC Voltage	115 V ac, 230 V ac
	Supply DC Voltage	DC 12, 24, 48 V
	Minimum Operating Temperature	-20°C
	Maximum Operating Temperature	60°C
	Series	MK9837N
	Standards/Approvals	CE, CCC, RoHS
	Height	90mm
	Length	97mm
	Width	22.5 mm

	Select all
	Brand Dold
	Product Type Monitoring Relay
	Contact Configuration SPDT
	Mount Type DIN Rail
	Terminal Type Screw
	IP Rating IP40, IP20
	Time Delay 0 to 20 s, 0 to 30s
	Supply AC Voltage 115 V ac, 230 V ac
	Supply DC Voltage DC 12, 24, 48 V
	Minimum Operating Temperature -20°C
	Maximum Operating Temperature 60°C
	Series MK9837N
	Standards/Approvals CE, CCC, RoHS
	Height 90mm
	Length 97mm
	Width 22.5 mm

Datasheet

COO (Country of Origin):: DE

Monitoring of local generator sets and voltage supplies

For precise frequency measuring with fast response time

High disturbance immunity

Separately adjustable trip points and separate outputs for over-

and under frequency (1 or 2 c/o each)

MK 9143N / MH 9143:

Trip points adjustable precisely and reproducible on 10 step rotational switch in the range of ± 0,1 Hz to ± 5 Hz related to 50 or 60 Hz

Nominal frequency 50 or 60 Hz selectable

Fixed hysteresis optimised for trip point

As option one common output for under and over frequency “Window”-mode (MK 9143N/400 / MH 9143/400)

Variable alarm value in the range of 45 to 65 Hz

Hysteresis adjustable for under- and over frequency separatelyadjustable 0 …20% Common output for under and over frequency “Window”-mode can be selected

Start up delay 0…30 s selectable

Manual or auto reset selectable

Output relay energized or de-energized on trip selectable for

over frequency

Output relay de-energized on trip for under frequency

Universal frequency measuring input for AC 40 … 550V

Several options for auxiliary supply

LED indicators for auxiliary supply, input frequency, over and

under frequency alarm

Dold Monitoring Relay, SPDT, DIN Rail, DC 12, 24, 48 V, 115 V ac, 230 V ac

FREE delivery for orders over $150, or create a business account to enjoy free delivery from just $28

Related links