P+F SMART Transmitter Power Supply KFD2-STC5-1.2O

This signal conditioner provides the galvanic isolation between field circuits and control circuits.The device supplies 2-wire and 3-wire SMART transmitters, and can also be used with 2-wire SMART current sources.
It transfers the analog input signal to the control side as two isolated output signals.Digital signals may be superimposed on the input signal on the field side or on the control side and are transferred bi-directionally.
The device provides a sink mode or a source mode output on the control side terminals.The device has an internal resistor. Use this resistor if the HART communication resistance in the control circuit is too low.
Test sockets for the connection of HART communicators are integrated into the terminals of the device.

Technical Data

General specifications
Signal type		Analog input
Functional safety related parameters
Safety Integrity Level (SIL)		SIL 2
Systematic capability (SC)		SC 3
Supply
Connection		Power Rail or terminals 14+, 15-
Rated voltage	Ur	18 ... 30 V DC
Ripple		within the supply tolerance
Power dissipation		≤ 1 W at maximum load
Power consumption		≤ 1.7 W at maximum load
Input
Connection side		field side
Connection		terminals 1+, 2-, 3
Input signal		4 ... 20 mA
Open circuit voltage/short-circuit current		terminals 1+, 3: 23 V / 25 mA
Input resistance		max. 265 Ω terminals 2-, 3 , max. 330 Ω terminals 1+, 3
Available voltage		≥ 16 V at 20 mA ; ≥ 20 V at 4 mA , terminals 1+, 3
Output
Connection side		control side
Connection		terminals 7+, 8-, 9-; 10+, 11-, 12- (sink)
Connection		terminals 7-, 8+, 9+; 10-, 11+, 12+ (source) see additional information
Load		0 ... 600 Ω
Output signal		4 ... 20 mA (overload > 25 mA)
Ripple		max. 50 µA eff
External supply (loop)		2 ... 30 V DC
		If the external voltage is > 19 V, a load ≥ ((V - 19) / 0.02) Ω is required. V represents the value of the external voltage.
		The internal 250 Ω resistor at terminals 9 and 12 can be used as a load.
Transfer characteristics
Deviation		at 20 °C (68 °F), 4 ... 20 mA
Deviation		≤ ± 10 µA incl. calibration, linearity, hysteresis, loads and supply voltage fluctuations
Influence of ambient temperature		≤ 0.25 µA/K
Frequency range		input in output: bandwidth with 1 mApp signal 0 ... 7.5 kHz (-3 dB)
Frequency range		output in input: band width with 1 Vss signal 0.3 ... 7.5 kHz (-3 dB)
Settling time		200 µs
Rise time/fall time		100 µs
Galvanic isolation
Input/Output		basic insulation according to IEC 61010-1, rated insulation voltage 300 Veff
Input/power supply		basic insulation according to IEC 61010-1, rated insulation voltage 300 Veff
Output/power supply		functional insulation, rated insulation voltage 50 V AC
Output/Output		functional insulation, rated insulation voltage 50 V AC
Indicators/settings
Display elements		LED
Labeling		space for labeling at the front
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EU		EN 61326-1:2013 (industrial locations)
Conformity
Electromagnetic compatibility		NE 21:2012
Electromagnetic compatibility		EN 61326-3-2:2008
Degree of protection		IEC 60529:2001
Protection against electrical shock		UL 61010-1:2012
Ambient conditions
Ambient temperature		-20 ... 70 °C (-4 ... 158 °F)
Mechanical specifications
Degree of protection		IP20
Connection		screw terminals
Mass		approx. 150 g
Dimensions		20 x 124 x 115 mm (0.8 x 4.9 x 4.5 inch) (W x H x D) , housing type B2
Mounting		on 35 mm DIN mounting rail acc. to EN 60715:2001

Compact P+F SMART Transmitter Power Supply KFD2-STC5-1.2O with LED Display Mass approx. 150 g 0

Frequently Asked Questions (FAQ) – SC Automation Limited

1. Who is SC Automation Limited?

SC Automation Limited (SC) was established in 2010 with over 10+ years of industry experience in automation instrumentation and industrial solutions.

2. Where does SC mainly distribute its products?

Our products are primarily exported to:

Africa: South Africa
Asia: Southeast Asia, Middle East
Europe: Nordic countries
Americas: South America
Oceania: Australia, New Zealand

3. What types of automation instruments does SC specialize in?

We focus on:

 Pressure Transmitters
Flow Meters
Ultrasonic Level Sensors
 Vibration Monitoring Systems
Water Quality Analyzers
Electric Actuators
 Solenoid Valves
Sensors & More

4. Which brands does SC supply?

5. Are SC’s products 100% genuine and new?

Yes! We only supply original, brand-new products with full manufacturer warranties.

6. Do SC’s products come with a warranty?

✅ 1-year warranty for all products (except consumables like electrodes).

7. What delivery terms does SC accept?

EXW (Ex-Works)
CIF (Cost, Insurance & Freight)

8. What currencies are accepted for payment?

 USD | EUR | CNY (RMB) | HKD

9. What payment methods does SC support?

 T/T (Bank Transfer)
Alipay | WeChat Pay

10. How can customers contact SC?

 WhatsApp: +86-13715021826
WeChat: +86-15012673027 / +86-15012630876
Email: joy@cc-scauto.com

11. What are SC’s working hours?

24/7 support! We respond promptly to inquiries at any time.

12. What is SC’s company philosophy?

"Honesty in Relationships, Excellence in Work – Integrity First."

13. What shipping methods does SC support?

Express Couriers: DHL, UPS, TNT, FedEx
Special Routes: Russia & Pakistan dedicated lines
Customer’s Own Logistics: Share your partner’s details, and we’ll arrange pickup.

14. Where are goods delivered?

 Mainland China or Hong Kong (brand-dependent).

15. Does SC support pre-shipment inspection?

✅ Yes! If you cannot visit, a trusted third party can inspect on your behalf.

16. What are SC’s payment terms?

 Full payment upfront for orders delivered within 1 week.
 30% deposit for orders with longer lead times.

17. Why choose SC Automation Limited?

✔  100% genuine products with reliable warranties
✔ Fast quotations & technical support (e.g., E+H product selection)
✔  Year-round shipping (excluding logistics holidays)
✔  Hassle-free sourcing – Your trusted one-stop automation supplier!

Need more details? Contact us anytime!

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Place of Origin:	SINGAPORE
Brand Name:	P+F
Certification:	CE
Model Number:	KFD2-STC5-1.2O
Document:	KFD2-STC5-1.2O.pdf

Minimum Order Quantity:	1pc
Price:	negotiable
Packaging Details:	Original packaging
Delivery Time:	1-2 weeks
Payment Terms:	T/T
Supply Ability:	100pcs per month

Input Signa:	4 ... 20 MA	Rated Voltage:	18 ... 30 V DC
Display Elements:	LED	Safety Integrity Level (SIL):	SIL 2
Mass:	Approx. 150 G	Dimensions:	20 X 124 X 115 Mm (0.8 X 4.9 X 4.5 Inch) (W X H X D) ,
Highlight:	P+F SMART Transmitter Power Supply , Compact SMART Transmitter Power Supply , KFD2-STC5-1.2O

Compact P+F SMART Transmitter Power Supply KFD2-STC5-1.2O with LED Display Mass approx. 150 g