I. Basic Information

Model: K7214

Brand: HIMA (Germany)

Type: Power Distribution / Fuse Protection Module (SIL3 Level)

Compatible System: H41q/H51q (HIQuad X) Series SIS/ESD System

Safety Level: SIL3 (IEC 61508), AK6, PL e/Cat.4

Certifications: CE, UL, TÜV, ATEX

Installation: 19-inch standard rack, 3U height (88mm)

Environment: IP20; Operating Temperature **-20°C to +60°C**, Storage Temperature -40°C to +70°C

Weight: Approximately 1.88kg

Dimensions: 482mm × 88mm × 170mm (Width × Height × Depth)

II. Core Parameters

Input Power Supply: 24VDC (18~32VDC), Dual Redundancy Input (L+1/L-, L+2/L-)

Total Current Capacity: Maximum 150A (redundant parallel)

Output Circuits: 18 Independent Fuse Circuits (each equipped with a circuit breaker)

Single Circuit Current: Maximum 16A / Circuit (recommended 4~10A)

Protection Features: Built-in E-T-A Circuit Breaker, Quick Breakdown for Overcurrent / Short Circuit

Monitoring Function: LED Status Indicator for Each Fuse Circuit + Relay Contact Alarm

Redundancy Design: Dual Power Input, Dual Bus Redundancy, Single Circuit Failure Does Not Affect the System

Isolation Voltage: Input / Output Side ≥ 1500VAC, Circuit-to-Circuit ≥ 500VAC

Power Consumption: ≤ 20W (No Load) / ≤ 50W (Full Load)

III. Interface and Terminal Definitions Table

Interface / Terminal Type Function

L+1/L- Power Input 1 Primary 24VDC positive / negative (Redundancy 1)

L+2/L- Power Input 2 Backup 24VDC positive / negative (Redundancy 2)

F1~F18 Output Circuit 1~18 Controlled 24VDC Output (with fuse)

ALARM Relay Contact Fuse Fault Alarm (Normally Open / Normally Closed)

LED Indicator Light Status Display Normal Power (Green), Circuit Fault (Red)

IV. Safety Features

SIL3 Level Redundancy: Dual power input + Dual Bus Redundancy, no single-point failure, compliant with IEC 61508.

Independent Circuit Protection: 18 Independent Circuit Breakers, single circuit fault does not spread, protecting downstream I/O and controller.

Real-time Monitoring and Alarm: Each LED status + Relay Contact Alarm, quickly locate faulty circuit, shorten downtime.

Fault Safety Design: Module loses power / severe fault, output circuit automatically cuts off to ensure safety state.

V. Installation and Wiring

Installation: Fixed in 3U position of 19-inch rack, with an upper and lower spacing of ≥50mm for heat dissipation; away from strong electricity / frequency converter.

Power Input:

Redundancy Configuration: L+1/L - Primary power supply, L+2/L - Backup power supply, dual power supplies are independently grounded.

Wire Diameter: ≥4mm² copper wire, single-ended grounding of shielding layer, terminal tightening torque ≥1.2N・m.

Output Circuit:

F1~F18 Connect to on-site I/O modules, sensors, actuators, each load ≤16A.

Circuit Breaker Selection: Recommended E-T-A 22IO series (4~10A), unused circuits are disabled or short-circuited.

Alarm Wiring: ALARM Relay Contact connects to the system DI, triggers SIS alarm when faulty.

VI. Debugging and Maintenance

Power-on Test: Both power supplies have LED constantly on; all circuits have LED green; no alarm output.

Configuration: SILworX software configures circuit alarm thresholds and redundancy mode.

Daily Maintenance: Check wiring tightness, circuit breaker status, LED indication every 6 months; dust removal, test alarm circuits.

Fault Troubleshooting:

Single Circuit Red Light: Overload / Short Circuit → Power-off check load, replace circuit breaker;

Dual Power Supply Alarm: Input phase missing / voltage abnormal → Investigate power redundancy configuration;

No Output: Bus Fault → Restart module or replace redundant power supply.

VII. Typical Applications

Petroleum / Chemical: SIS System Cabinet 24VDC Power Supply Centralized Distribution, I/O Modules / On-site Instruments Power Supply Protection;

Oil and Gas / Power: ESD System Redundant Power Management, Critical Actuators (Valves / Pumps) Power Circuit Monitoring;

Applicable Scenarios: H41q/H51q System requires SIL3 level, large current, multi-circuit power distribution for safety-critical scenarios