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Home Products Pepperl Fuchs Safety Barrier

HiC2821 | 1-Ch Isolated Barrier, 24V DC Bus Powered, 2 Relay Outputs, SIL 2

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Certification

"ACH has proven to be a reliable partner. Their products are genuine and high-quality, with competitive prices and on-time delivery. We trust them as our long-term supplier in automation."

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"For us, cost efficiency and authenticity are key. ACH helps reduce expenses while ensuring reliable quality and timely supply, making them a strong partner in our operations."

—— Procurement Manager

"For us, cost efficiency and authenticity are key. ACH helps reduce expenses while ensuring reliable quality and timely supply, making them a strong partner in our operations."

—— Supply Chain Director

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HiC2821 | 1-Ch Isolated Barrier, 24V DC Bus Powered, 2 Relay Outputs, SIL 2

Large Image : HiC2821 | 1-Ch Isolated Barrier, 24V DC Bus Powered, 2 Relay Outputs, SIL 2 Get Best Price

Product Details:

Brand Name:	P+F
Certification:	ATEX
Model Number:	HiC2821
Document:	ACH-AB-P+F-E+H-IFM-ASCO-YOK...WA.pdf

Payment & Shipping Terms:

Minimum Order Quantity:	1
Price:	Negotiable
Packaging Details:	carton
Delivery Time:	Negotiable
Payment Terms:	T/T,XT,ALIPAY
Supply Ability:	100pcs per month

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Detailed Product Description

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Pepperl Fuchs safety barrier 24V DC

Isolated safety barrier SIL 2

1-Ch safety barrier relay outputs

HiC2821 | 1-Ch Isolated Barrier, 24V DC Bus Powered, 2 Relay Outputs, SIL 2

P+F HiC2821 switch amplifier — 1-ch isolated barrier for NAMUR/dry contact inputs, 24V DC bus powered via termination board, 2 relay outputs + fault relay, SIL 2 per IEC 61508. H-System module.

Product Overview

The P+F HiC2821 is a 1-channel switch amplifier (isolated barrier) belonging to the H-System family — designed for intrinsic safety applications in hazardous areas. It transfers digital signals from NAMUR sensors or mechanical contacts (located in Zone 0/1/2) to the non-hazardous control room via galvanically isolated relay outputs. The device is 24 V DC bus powered through the HiC termination board, eliminating the need for a separate auxiliary power supply. Key capabilities include signal splitting (1 input → 2 outputs), line fault detection (LFD) with configurable thresholds, and a reversible mode of operation via DIP switches. It achieves SIL 2 systematic capability per IEC/EN 61508, making it suitable for safety-relevant control loops in oil & gas, chemical, and pharma plants.

Technical Specifications (Input & Output)

Parameter	Specification
Model	HiC2821 (P+F H-System Switch Amplifier)
Signal Type	Digital Input (NAMUR or dry contact)
Supply	19 … 30 V DC, bus powered via Termination Board (SL1), ripple ≤ 10 %, Ir ≤ 30 mA
NAMUR Characteristics	Open-circuit voltage ≈ 10 V DC, short-circuit current ≈ 8 mA
Switching Point / Hysteresis	1.2 … 2.1 mA / approx. 0.2 mA
Line Fault Detection (LFD)	Breakage I ≤ 0.1 mA, Short-circuit I ≥ 6.7 mA
Outputs	2 × Relay Contact (output I: signal; output II: signal or fault message), 50 V DC / 0.5 A per contact
Fault Output	Open collector transistor on internal fault bus (SL1: 6b)
Switching Frequency	≤ 10 Hz
Energize/De-energize Delay	≤ 20 ms / ≤ 20 ms
Mechanical Life	10^7 switching cycles

Technical Specifications (Safety & Mechanical)

Parameter	Specification
Safety Integrity Level	SIL 2 acc. to IEC/EN 61508, Systematic Capability SC 3
Hazardous Area Marking (Input)	[Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I (allows sensors in Zone 0/1/2, 20/21/22, M1)
Hazardous Area Marking (Output)	II 3G Ex nA nC IIC T4 Gc (safe-side, non-Ex area)
Galvanic Isolation	Input/Output & Input/Supply: 375 V peak per IEC/EN 60079-11
Maximum Safe Voltage (Um)	253 V AC (both input & output sides)
Mounting	On HiC Termination Board (12.5 mm module width, coding pins 1 and 2 pre-trimmed)
Configuration	Via DIP switches on front panel (mode reversal, LFD on/off, output II function)
Indicators	3 × LEDs: Power (green), Status/Fault (yellow/red)
Ambient Temperature	-20 … +60 °C
Ingress Protection	IP20
Dimensions (W × H × D)	12.5 × 106 × 128 mm
Weight	≈ 100 g
Approvals	ATEX (BASEEFA 06 ATEX 0093 X), IECEx (BAS 06.0026X), FM, UL
Directive Compliance	2014/34/EU, 2014/30/EU, EN 61326-3-2 (industrial immunity)

Key Features

Bus-Powered via Termination Board: No separate 24 V DC wiring to each module — power and signal routed through the common termination board, simplifying panel layout.
Dual Relay Outputs (Signal Splitting): One field input drives two independently configurable relay outputs — enables signal duplication to two separate control systems (e.g., DCS + SIS) without extra components.
Reversible Mode & Configurable Second Output: DIP switches allow reversing the input logic (NO↔NC behavior) and repurposing output II as a fault indication instead of a second signal — highly flexible commissioning.
Line Fault Detection (LFD): Automatically detects sensor wire break or short to ground, forcing relays to de-energize and signaling fault per NAMUR NE 44 — critical for safety loops.
SIL 2 / SC 3 Capable: Suitable for safety instrumented functions up to SIL 2 when integrated with appropriate logic solvers.

Typical Applications

Oil & Gas / Petrochemical: NAMUR proximity switch and flame detector signals from Zone 1 to DCS/SIS.
Chemical Plant Hazardous Areas: Conductive level switch and solenoid valve limit switches in Zone 0/1.
Pharmaceutical & Biotech: Safety interlocks for agitators, valves, and cleanroom door switches.
Mining & Grain Handling: Dust ignition protection (Ex ia Da IIIC) for equipment in combustible dust zones.

The HiC2821 is the H-System module version — it mounts on a HiC termination board (e.g., HiCTB04, HiCTB08, HiCTB16). For the K-System DIN-rail version with identical electrical specs, see KCD2-SR-EX2.R or KFD2-SR-EX2.R (single/dual channel equivalents). The 0000 suffix is not a valid P+F ordering code for this device — HiC2821 is the complete type designation.

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About ACH

Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.

Frequently Ask & Questions

Are preferential prices available?

Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.

Are the Products Genuine OEM Units?

Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.

How will you arrange shipment?

We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.

What is the warranty of goods?

One-year Warranty.

How long is the logistics cycle of the product?

Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.

Ratings & Review

Overall Rating

5.0

Based on 50 reviews for this supplier

Rating Snapshot

The following is the distribution of all ratings

5 stars

100%

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2 stars

1 stars

All Reviews

Aisha Noor

United Arab Emirates May 10.2026

Helpful (1)

The KFD2-SRA-EX4 signal conditioner is top quality, delivering reliable isolation and steady performance in our hazardous plant environment.

Rahul Sharma

British Indian Ocean Territory May 8.2026

Helpful (1)

The KFD2-STC4-EX2.Y1 transmitter power supply performs flawlessly, delivering stable and reliable power to our smart instruments in harsh industrial conditions.

Muhammad Ali

Pakistan May 7.2026

Helpful (1)

The KFD2-STC5-EX1.20 transmitter power supply is highly reliable, delivering consistent, noise-free power to our smart instruments in hazardous industrial environments.

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