Schneider MES120/59715E-FB-060 Expansion module

Description

Schneider MES120/59715E-FB-060 Expansion module

The Schneider Electric MES120 (Catalog Ref. 59715) is an input/output expansion module for Sepam Series 60 and Series 80 digital protection relays. Note that the full code MES120/59715E-FB-060 isn’t listed as a separate retail catalog number; MES120 and 59715 are the standard product identifiers.

Product Overview

The Schneider Electric MES120 adds 14 DC logic inputs and 6 relay outputs to compatible Sepam protection relay base units. It lets substation operators monitor extra breaker statuses and trigger additional trip or alarm signals across medium- and high-voltage power networks.

Technical Specifications

• Model / Reference: MES120 / 59715
• Compatible Relay Families: Sepam Series 60 and Sepam Series 80
• Logic Inputs: 14 DC inputs supporting 24 to 250 V DC (operating range 19.2–275 V DC)
• Relay Outputs: 6 total outputs (1 control relay + 5 annunciation relays)
• Control Relay Rating: Up to 8 A continuous current at 48 V DC (making capacity up to 15 A for 200 ms)
• Annunciation Relay Rating: Up to 2 A continuous current across 100–240 V AC, 127 V DC, or 220 V DC
• Dimensions & Weight: 170 mm height; approx. 525 g

Key Advantages

• High I/O Density: Packs 14 inputs and 6 outputs into a single plug-in module, saving panel space inside compact switchgear cabinets.
• Wide DC Input Range: Accepts 24 to 250 V DC on the logic inputs, fitting most substation auxiliary battery banks without needing external voltage converters.
• Software-Assignable Logic: Every input and output maps to custom protection schemes or predefined control functions using the Sepam SFT2841 configuration software.
• Dedicated Trip & Alarm Split: Separates high-current breaker control (8 A control relay) from lower-current status signaling (2 A annunciation relays).

Important Precautions

• Verify DC Voltage Variant: The standard MES120 (59715) accepts 24–250 V DC inputs. Do not confuse it with the Schneider Electric MES120G (220–250 V DC threshold) or the Schneider Electric MES120H (110–125 V DC threshold).
• Follow Slot Mounting Order: Sepam Series 60 and 80 base units require modules to be installed in a strict slot sequence; check the Sepam installation sheet before snapping the module into the rear bus.
• Power Isolation: Always isolate auxiliary DC control power and trip circuits before plugging in or removing the module from the relay chassis.
• Lifecycle Status: Schneider Electric has begun phasing out standard commercialization for reference 59715 in several regions (with end-of-service scheduled for December 2030), so confirm spare-part availability for long-term projects.

Applications

• Medium-Voltage Switchgear: Monitors circuit breaker open/closed positions, spring-charge status, and trip-circuit supervision.
• Substation Automation & SCADA: Concentrates local switchgear alarms and forwards status changes to central grid control systems.
• Industrial Power Distribution: Protects transformers, feeders, and large motors in utilities, oil and gas plants, and heavy manufacturing facilities.

Choose the Schneider Electric MES120 when expanding a Sepam Series 60 or 80 relay across general 24–250 V DC substation circuits, or step up to the high-threshold MES120G or MES120H variants if your facility enforces strict high-burden DC input thresholds.

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