Description
Product Introduction
Power interruptions at a remote I/O node can cause multiple field signals to become unavailable, making it difficult to distinguish a supply fault from a communication or module failure. The MTL 8910-PS-DC addresses this requirement by providing regulated 12 VDC power to compatible PAC8000 general-purpose nodes.
Its wide DC input range accommodates typical 24 VDC plant supplies, while the short hold-up interval and supply-health signaling support system diagnostics. For replacement work, verify carrier compatibility, load demand, redundancy wiring, and the existing power-failure monitoring arrangement before installation.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 8910-PS-DC |
| Manufacturer | MTL Instruments / Eaton |
| Product family | MTL 8000 / PAC8000 |
| Product type | DC-input system power supply |
| Input voltage | 18.5–36 VDC |
| Output voltage | 12 VDC ±5% |
| Maximum output current | 4.9 A |
| Efficiency | Approximately 80% at 24 V input under the specified full-load test condition |
| Hold-up time | 7 ms under documented test conditions |
| Input-output isolation | 50 VAC RMS / 720 VDC, subject to the specified operating standard |
| Power-fail signaling | Input- and output-threshold signals to the bus interface module (BIM) |
| Protection | Input fuse, reverse-supply protection, and output short-circuit thermal protection as documented |
| Operating temperature | −40°C to +70°C at 60% load; full-load limits depend on mounting orientation |
| Storage temperature | −40°C to +85°C |
| Relative humidity | 5–95%, noncondensing |
| Ingress protection | IP20 with the specified carrier and connectors installed |
| Approximate dimensions | 42 × 110 × 160 mm |
| Approximate weight | 775 g |
| Mounting | Compatible MTL carriers, including 8711-CA-NS and 8712-CA-NS |
| Redundancy | Supports a second supply in an approved configuration |
Specifications are drawn from the MTL system-power-supply datasheet and Eaton’s legacy power-supply documentation. Temperature limits depend on load and mounting orientation; do not use the light-load maximum as a full-load operating rating.
8910-PS-DC
Application Scenarios & Pain Points
A remote I/O node may lose power even when the plant’s main 24 VDC bus remains energized. The 8910-PS-DC is intended for compatible PAC8000 installations where a regulated 12 VDC supply is required.
- PAC8000 general-purpose I/O nodes: Supplies the designated node electronics using the specified DC input and output ratings.
- Redundant power arrangements: Allows a second supply to be installed where the carrier and system design support redundancy.
- Process-control cabinets: Supports remote I/O infrastructure in industrial process installations, including appropriate oil and gas, chemical, and utility applications.
- Legacy-system maintenance: Provides a potential replacement for installed systems that still use the original MTL power-supply architecture.
Field troubleshooting tip: If the bus interface module reports a supply fault, measure the input voltage under load and inspect the carrier connections before condemning the power module. A supply can measure correctly with no load and still fail when the I/O node draws current.
Related Products
These models are related to the MTL power-supply and carrier family, but their functions and ratings differ.
- 8913-PS-AC — AC-input power-supply variant; verify its input and output ratings before considering it for a replacement.
- 8914-PS-AC — AC-input supply with a documented 24 VDC output for field-power applications; not a direct substitute for a 12 VDC node supply.
- 8711-CA-NS — Node-services carrier documented for use with the 8910-PS-DC.
- 8712-CA-NS — Alternative node-services carrier listed for the 8910-PS-DC.
- 8717-CA-PS — Power-supply carrier referenced in MTL documentation; confirm the intended system layout and wiring.
- PAC8000 BIM — Bus Interface Module that receives supply-health and power-failure signals from compatible power-supply arrangements.
The carrier and related-product references are based on the MTL power-supply documentation. Verify the specific carrier revision and installation design before ordering associated parts.
Engineer’s Guide: Replacement Checks
1. Match the output voltage and current.
Warning: The 8910-PS-DC supplies 12 VDC at up to 4.9 A. A generic 24 VDC supply is not an equivalent replacement simply because the plant’s upstream supply is 24 VDC.
2. Check the carrier and redundancy arrangement.
Confirm the carrier model, terminal connections, available mounting position, and wiring for the second supply if redundancy is used. Do not assume that a different MTL power module fits the same carrier or uses the same connections.
3. Verify environmental and loading limits.
The published operating range depends on load and orientation. Check cabinet ventilation, ambient temperature, output demand, and supply-failure signaling during commissioning.
For used or refurbished stock, request photographs of the actual module and label, functional test results under load, condition details, warranty terms, and confirmation that the correct carrier or accessories are included.
Frequently Asked Questions
Q1. What is the MTL 8910-PS-DC used for?
It provides regulated 12 VDC power to compatible PAC8000 general-purpose I/O nodes. It is a system power supply, not a signal-processing module.
Q2. What input voltage does the 8910-PS-DC accept?
The specified DC input range is 18.5–36 VDC, which accommodates a typical nominal 24 VDC industrial supply. Check voltage at the module terminals under load.
Q3. Does the 8910-PS-DC output 24 VDC?
No. Its documented output is 12 VDC ±5%, rated at up to 4.9 A. Do not substitute a 24 VDC-output model without an approved system design change.
Q4. Can the 8910-PS-DC operate in a redundant power configuration?
Yes, the documentation specifies support for a second supply in a compatible arrangement. Redundancy depends on the carrier, wiring, and system configuration; it should be verified against the installation manual.
Q5. What is the operating temperature range?
The documented range is −40°C to +70°C at 60% load. At full load, the maximum temperature depends on mounting orientation, with the cited datasheet specifying lower limits.
Q6. Is the MTL 8910-PS-DC still manufactured?
Available legacy-product information identifies it as discontinued or obsolete. Existing inventory may still be available, but buyers should confirm the actual stock condition and any replacement recommendations before planning maintenance.
Q7. What should I confirm before purchasing a replacement?
Verify the complete part number, 12 VDC output requirement, 4.9 A capacity, carrier compatibility, redundant-supply arrangement, condition, functional test evidence, warranty, and delivery estimate. For an operating system, compare the replacement against the installed hardware documentation before removing the existing unit.
