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Key Technical Specifications
| Parameter | Value |
| Manufacturer | HIMA Paul Hildebrandt GmbH |
| Model Number | 62100 (62 100) |
| Part Number | 984062100 |
| Safety Integrity Level | SIL 3 / TÜV Tested according to IEC 61508 & DIN V 19250 RC 1…6 |
| Input Channels | 2-Fold (Dual Independent Analog Circuits) |
| Input Ranges | 0…22 mA / 0…5.5 V (No Line Diagnosis) or 4…22 mA / 1…5.5 V (With Line Diagnosis) |
| Output Channels | 4 short-circuit proof limit value outputs (100 mA each) |
| Input Resistance | ≥ 100 kΩ |
| Measurement Resolution | 12-Bit |
| Total System Safety Time | < 250 ms |
| Operating Voltage | 24 V DC (± 15%) / 170 mA base consumption plus load |
| Form Factor | 19-inch subrack compatible, 3U height, 4 SU width |
| Operating Temperature | −25°C to +70°C (−13°F to +158°F) |
Product Introduction
The HIMA 62100 984062100 is a high-reliability, 2-fold analogue limit monitor designed for strict deployment within safety-instrumented systems (SIS) and Emergency Shutdown (ESD) architectures. As a cornerstone component of the hardwired HIMA Planar 4 platform, this module executes precise signal evaluation of critical loops—such as vessel pressure, reactor temperature, or turbine vibration—to safeguard equipment and plant personnel in high-risk environments.
Equipped with a dual-processor monitoring structure, the 62100 984062100 achieves full SIL 3 compliance. It samples analog sensor signals, matches them against user-defined limit thresholds, and triggers dedicated, fail-safe digital outputs the moment parameters move out of safe boundaries. The module functions completely independently of external PC software, allowing engineers to program thresholds, gradient rates, and hysteresis variables locally through the onboard pushbuttons and integrated LCD matrix display.
- 62100 984062100
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
| Front panel RDY (Ready) LED remains unlit | Backplane supply drop or module primary fuse open | ✅ High | Check the backplane power supply connector. Measure the main 24 V DC supply across the subrack lines using a Fluke 115 multimeter. | If the rack is supplying a steady 24 V DC but the RDY light stays dark, the module’s power input protection has tripped. Replace the module. |
| ERR icon displayed / Flashing red fault light | Internal diagnostic processor mismatch or critical self-test failure | ✅ High | Check if output d28 is active (held at 1-signal) and verify if the internal safety relay contact z26-d26 has opened. | Cycle the main rack power. If the hardware lockup or ERR indicator returns immediately, the dual-processor core has suffered damage. Replace the module. |
| Onboard LCD icons flashing continuously | Field loop anomaly (Line break or short circuit in output lines) | ✅ High | Measure the output current loops directly. Ensure that output line load parameters match the parameter limits. | Verify field-side cable terminations and connection junctions. Clean or swap compromised physical field lines before replacing the card. |
| Analog channel inputs read 0% or sit below normal range | Incorrect channel operating mode or field transmitter drop | ❌ Low | Confirm if NAMUR NE 43 limit processing thresholds are active. Measure the 4-20 mA loop input pins at terminals z2/d2 or z4/d4. | Verify transmitter calibration and check instrument loop fuses before pulling the HIMA monitoring hardware. |
Note: If complex trip conditions persist on your Planar 4 rack assembly, document your front-panel LCD error frames along with terminal voltage readings, and submit them to our safety systems engineering group.
Frequently Asked Questions (FAQ)
Can I modify the safety threshold limits while the HIMA 62100 is actively protecting a live process?
No. For safety reasons, the Planar 4 architecture prevents parameter modifications while the unit is in normal run operation. To alter your limit values or hysteresis settings via the front pushbuttons, the module must be placed into configuration mode, which safely de-energizes the safety outputs. Adjust your parameters only during planned plant turnaround windows or when the loop is bypassed.
What is the purpose of the 1oo2 voting operation configuration mentioned in the system documents?
The HIMA 62100 natively supports 1oo2 (One-out-of-Two) voting logic internally. This allows you to route two separate, non-safety-rated field transmitters into this single SIL 3 rated monitor. The onboard dual-processor system evaluates both signals simultaneously, looking for discrepancies in value and response time, providing a highly cost-effective way to achieve rigorous safety compliance without buying redundant safety-rated instruments.
Does this version of the 984062100 require external programming software or handheld calibrators?
No external programming assets or software platforms are required. All parameters—including low/high limit selection, gradient rate-of-change monitoring, and line diagnostics—are entered manually through the five integrated tactile pushbuttons located below the front panel LCD.
Why is clear line diagnosis critical on a safety-instrumented system like the Planar 4?
When line diagnosis is enabled on the 62100, the module continually pulses a low-current supervisory signal through the field wiring. If an explosion-proof valve or relay coil line gets clipped or shorted out, the card instantly catches the drop in impedance and alerts operators via flashing display icons, preventing hidden dangerous failures that could stall an emergency shutdown.
What condition are these modules in, and how are they validated?
Since HIMA moved focus toward newer programmable systems, these legacy Planar 4 modules are supplied out of our New Surplus reserves. They are unused OEM assets that have been held in controlled storage environments. Each board is inspected for physical trace integrity, run through a full power-on self-test (POST) sequence, sealed in proper ESD protective shielding packaging, and backed by a comprehensive 1-year warranty.
