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3. Key Technical Specifications
The Eaton MTL 8920-PS-DC provides clean, regulated internal power conditioning to isolate sensitive 8000 Series process I/O microprocessors from external field power fluctuations and electrical noise.
| Parameter | Value |
|---|---|
| Part Number | 8920-PS-DC |
| Manufacturer | Eaton MTL Instruments |
| Product Line | MTL 8000 Series I/O System |
| Module Type | System Power Supply (DC Input) |
| Input Voltage | 24 VDC nominal (18–32 VDC operational range) |
| Output Voltage | Regulated internal system power / railbus voltage |
| Redundancy | Supports dual N+1 redundant power supply configurations on node carriers |
| Mounting | Direct plug-in mounting onto MTL 8000 power supply carrier positions |
| Operating Temperature | -40°C to +70°C |
| Hazardous Area Rating | Class I, Div 2 / Zone 2 compatible (when mounted in approved enclosure) |
4. Product Introduction & Supply Chain Strategy
The Eaton MTL 8920-PS-DC power supply module energizes the internal bus infrastructure of the MTL 8000 distributed process I/O system. By providing galvanic isolation between field DC supply sources and internal backplane electronics, it protects node controllers and process I/O modules from power surges and ground loops.
Stocking an uninstalled MTL 8920-PS-DC module in reserve as New Surplus is an essential risk-mitigation strategy for continuous process operations. Power supply failure on a process node causes an immediate loss of communication across all attached I/O channels, triggering emergency process shutdowns. Keeping factory-sealed spare power modules on-site allows immediate, hot-swappable restoration without powering down the entire control rack.
5. Installation & Configuration Guide
Hazardous Area & Electrical Power Safety Warning
Verify that DC input lines are isolated before terminating primary power feeds. Confirm local atmospheric safety compliance prior to servicing power hardware in Zone 2 / Class I, Div 2 hazardous environments.
1
DC Supply Line Isolation
Prerequisite
1.DC Supply Line Isolation:Prerequisite.
De-energize the external 24 VDC bulk power supply feed to the power supply carrier position before landing terminal wiring.
2
Slot Alignment Check
Carrier Base Verification
2.Slot Alignment Check:Carrier Base Verification.
Inspect the designated power supply position on the MTL 8000 node carrier to ensure edge connectors and guide rails are free from debris.
3
Hot-Swap Module Insertion
Module Installation
3.Hot-Swap Module Insertion:Module Installation.
Align the 8920-PS-DC module with the carrier guide rails and seat the unit firmly until the top and bottom retaining screws/latches engage.
4
Diagnostic LED Check
Power Verification
8920-PS-DC
8920-PS-DC
4.Diagnostic LED Check:Power Verification.
Apply 24 VDC input power and confirm that the front green “Power OK” status LED illuminates, signaling proper internal voltage regulation.
6. Firmware/Software Versions & Upgrade Notes
- Hardware Compatibility: Fully compatible with standard MTL 8000 power supply carriers and node backplanes.
- Redundant Configuration: When installed in dual-power carrier bases alongside a second 8920-PS-DC module, it supports seamless load sharing and hot-swap redundancy.
- Passive Operation: Requires no software parameters or software calibration—functioning immediately upon application of input voltage.
7. Frequently Asked Questions (FAQ)
Q: Is this Eaton MTL 8920-PS-DC unit genuinely new? A: Yes, this item is a Brand New Surplus unit. It has never been installed in an active process panel or wired to live plant supplies, and is preserved in protective OEM packaging.
Q: What is the main function of the 8920-PS-DC? A: It converts external 24 VDC bulk plant power into regulated internal power to run the microprocessors and backplane communication of MTL 8000 process I/O nodes.
Q: Can this power supply module be hot-swapped while the system is running? A: Yes, in a redundant power supply carrier setup, an 8920-PS-DC module can be hot-swapped without interrupting power to the running I/O node.
Q: What warranty accompanies this unit? A: Every MTL 8920-PS-DC module comes with a full 1-year replacement warranty and quality inspection prior to dispatch.
