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The GE 8920-PS-DC is an Intrinsically Safe (IS) DC power supply module from the GE PAC8000 SafetyNet series (also supported under MTL / Eaton / GE Grid Solutions). Designed for hazardous area applications, the GE 8920-PS-DC supplies clean, isolated 12 VDC power to up to 8 IS I/O modules or 2/1 (IS) modules in safety-critical process control systems. It accepts a nominal 24 VDC input (wide range typically 18–72 VDC or 12–48 VDC) and delivers up to 5 A output capacity with support for load-sharing redundancy when multiple units are used in parallel. The GE 8920-PS-DC features galvanic isolation, low no-load power consumption, and hazardous area certifications, making it ideal for oil & gas, chemical, pharmaceutical, and other explosive atmosphere environments. Its compact design and reliable performance ensure uninterrupted power to intrinsically safe field devices and I/O in the PAC8000 SafetyNet system. Although a legacy module in the PAC8000 family, the GE 8920-PS-DC remains widely supported for maintaining existing safety instrumented systems (SIS) and distributed control applications.

Model,GE 8920-PS-DC

Manufacturer,General Electric (GE) / MTL / Eaton

Series,PAC8000 SafetyNet / IS System

Product Type,Intrinsically Safe (IS) DC Power Supply Module

Input Voltage,Nominal 24 VDC (wide range: typically 12–48 VDC or 18–72 VDC)

Output Voltage,12 VDC

Output Current,5 A capacity

Power Capacity,Supports up to 8 IS I/O modules

Redundancy,Load sharing for redundant configurations

Isolation,Galvanic isolation for intrinsic safety

Terminals,3-core 7.62 mm spacing industrial terminals

No-Load Power Consumption,Approx. 2.16 W @ 24 VDC

Hazardous Area Approvals,"ATEX, IECEx, FM (Class I Div 1 / Zone 0/1)"

Operating Temperature,Wide industrial range (typically -20°C to +60°C)

Applications,"Hazardous area I/O power, SafetyNet SIS, process control in explosive atmospheres"

Mount the GE 8920-PS-DC securely in the PAC8000 SafetyNet rack or IS power distribution panel.

Connect the DC input power (nominal 24 VDC) to the input terminals using appropriately rated wiring.

Wire the 12 VDC output to the IS I/O modules or bus (up to 8 modules supported).

For redundant setups, install a second GE 8920-PS-DC and configure for load sharing.

Apply input power and verify output voltage (12 VDC) and status indicators (if present).

Monitor system diagnostics in the PAC8000 controller for power health and any IS circuit faults.

Perform load testing to confirm stable output under full module load during commissioning.

De-energize all input power sources and follow hazardous area procedures (permit to work, gas-free certification) before installing or servicing the GE 8920-PS-DC.

Use proper grounding and ensure all wiring meets intrinsic safety requirements (entity parameters, cable capacitance/inductance limits).

Verify input voltage is within the supported range and use adequately sized wiring with correct polarity.

Install in a certified enclosure suitable for the hazardous area classification (Zone 0/1 or Class I Div 1).

Separate IS wiring from non-IS circuits and maintain minimum separation distances.

For redundant configurations, ensure both units share the load evenly and test failover.

After installation, measure output voltage under no-load and full-load conditions and confirm no alarms in the safety system before commissioning.

Check status indicators (if equipped) and system diagnostics daily on the GE 8920-PS-DC for normal power output and any fault alarms.

Monitor input and output voltage levels via the PAC8000 HMI or controller to ensure stable 12 VDC delivery.

Review event logs for any power-related alarms, overload conditions, or redundancy issues.

Inspect terminals and wiring connections weekly for tightness, corrosion, or signs of overheating in the hazardous area environment.

Verify redundant units (if installed) are sharing load properly and no single unit is overloaded.

Clean dust from the module and enclosure vents (power off, with proper permits) using low-pressure compressed air every 1–3 months.

During scheduled shutdowns, test full output capacity, measure ripple/noise, and confirm intrinsic safety barriers and entity parameters remain compliant.

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