RLY4 2500M/RLY4/XXXXX/XXXXXX
RLY4 2500M/RLY4/XXXXX/XXXXXX
RLY4 2500M/RLY4/XXXXX/XXXXXX
RLY4 2500M/RLY4/XXXXX/XXXXXX
RLY4 2500M/RLY4/XXXXX/XXXXXX
RLY4 2500M/RLY4/XXXXX/XXXXXX
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  • Lifecycle status

    Discontinued / Obsolete by OEM
    Apter Power provides RLY4 quotations, 2500-series manuals, and terminal-unit configuration matching.

RLY4 2500M/RLY4/XXXXX/XXXXXX

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Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX is a four-channel relay output module that converts 2500 I/O commands into three normally open and one changeover contact circuit.
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Technical specifications for RLY4 2500M/RLY4/XXXXX/XXXXXX

  • Manufacturer:
    Invensys
  • Part Number:
    RLY4 2500M/RLY4/XXXXX/XXXXXX
  • Product Family:
    Foxboro
  • Product Type:
    Four-Channel Relay Output Module
  • Stock:
    1
  • Relay channels:
    4
  • Contact arrangement:
    3 normally open channels and 1 changeover channel
  • Maximum resistive load:
    2 A at 240 V AC
  • Minimum resistive load:
    100 mA at 12 V DC
  • Installation category:
    Category II
  • System insulation:
    Reinforced, 264 V AC maximum to earth
  • Channel insulation:
    Functional, 264 V AC maximum
  • Maximum module consumption:
    1.5 W
  • Snubbered contact paths:
    Ax–Bx contacts use 22 nF / 100 Ω snubbers
  • Unsnubbered path:
    A4–C1
  • Output indication:
    Four yellow channel indicators
  • Module indication:
    Green status indicator
  • Documented terminal units:
    2500T-T000 or 2500T-T040, according to fuse requirements
  • Design location:
    United Kingdom
  • Manufacturing marking:
    Made in China
  • Weight:
    0.265 lbs (0.12 kg)
  • Estimated shipping dimensions:
    2.6x8.8x9cm
  • Tariff Code:
    8536419090
  • Country of origin:
    China
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Relay Channels Contact Loads Insulation Terminal Check

Features:

  • Provides four relay outputs: three normally open and one changeover channel.
  • Switches up to 2 A resistive at 240 V AC with a 100 mA at 12 V DC minimum load.
  • Uses reinforced system insulation and functional channel insulation to 264 V AC.
  • Consumes 1.5 W maximum and uses a compact 2.6x8.8x9 cm module body.
Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX converts four 2500 I/O output commands into isolated mechanical contact paths.

The first three channels use normally open contacts, while the fourth channel supplies the changeover arrangement.

Contact ratings, insulation class, snubber placement, and terminal-unit choice must all match the installed load wiring.

The Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX Four-Channel Relay Output Module may still be available through Apter Power after OEM discontinuation.
Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX Four-Channel Relay Output Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

How the four output commands map to contacts

  • Channels 1–3: Each uses a normally open relay contact.
  • Channel 4: The fourth output uses a changeover contact.
  • Status LEDs: Four yellow indicators show individual output states.
  • Module state: A green indicator reports module condition.

Electrical boundaries for switched circuits

  • AC maximum: The resistive rating is 2 A at 240 V AC.
  • DC minimum: The documented minimum is 100 mA at 12 V DC.
  • Snubbers: Ax–Bx paths use 22 nF / 100 Ω networks.
  • Unsnubbered path: A4–C1 does not include the same internal snubber.

Separation between system, channels, and earth

  • System boundary: Reinforced insulation is rated to 264 V AC maximum to earth.
  • Channel boundary: Functional insulation is rated to 264 V AC maximum.
  • Installation category: The module is marked Category II.
  • Power load: Module consumption does not exceed 1.5 W.

Checks at the field-wiring interface

  • Terminal type: Verify whether 2500T-T000 or 2500T-T040 is installed.
  • Channel 4 wiring: Preserve the changeover contact arrangement.
  • Load class: Compare every connected load with the resistive contact limits.
  • Order identity: Retain the complete RLY4 2500M/RLY4/XXXXX/XXXXXX label string.
Description
As the four-channel relay output module in the Foxboro 2500 remote I/O system, RLY4 2500M/RLY4/XXXXX/XXXXXX converts commands from the I/O base into isolated contact changes for externally powered field circuits.

At the mounting interface, RLY4 2500M/RLY4/XXXXX/XXXXXX works with the selected 2500 terminal unit, which carries the field wiring and any specified fuse arrangement. The terminal unit therefore defines how the removable electronics module is connected to the permanent plant conductors.

For each command, RLY4 2500M/RLY4/XXXXX/XXXXXX changes a mechanical relay contact rather than generating the field voltage itself. Three commands operate normally open paths, while the fourth uses a changeover path, so the external supply and load must follow the contact form assigned to that channel.

Contact protection inside RLY4 2500M/RLY4/XXXXX/XXXXXX also depends on the selected terminal path. The Ax–Bx circuits include internal RC snubbers but A4–C1 does not, making channel assignment part of the suppression design instead of a freely interchangeable wiring choice.
Alternative Names
Foxboro RLY4 2500M RLY4 2500M/RLY4/XXXXX/XXXXXX RLY4 2500M Relay Module 2500MRLY4XXXXXXXXXXX Foxboro 2500 RLY4 RLY4 Four Channel Relay Output 2500M RLY4 XXXXX XXXXXX RLY4 2500M/RLY4/XXXXX/XXXXXX
Technical notes
Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX uses placeholder sections in its printed order string; the RLY4 contact form, terminal unit, fuse arrangement, and snubbered paths must be verified from the installed label and wiring.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Which contact forms are available on Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX?
Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX provides three normally open relay channels and one changeover channel, so channel 4 must not be wired as if it matched channels 1–3.
What load can Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX switch at 240 V AC?
The contacts of Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX are rated for a 2 A resistive load at 240 V AC; inductive loads require the applicable derating and suppression.
Why might a very small DC load fail to switch reliably on Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX?
Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX specifies a minimum resistive load of 100 mA at 12 V DC, so a signal below that wetting-current level is outside the documented boundary.
Which contact path lacks an internal snubber on Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX?
The A4–C1 path on Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX is not snubbered, unlike the Ax–Bx paths that use 22 nF / 100 Ω networks.
How should the terminal unit be selected for Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX?
Match Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX to the documented 2500T-T000 or 2500T-T040 terminal arrangement according to the required fuse and field-wiring configuration.
What power must be allowed for Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX?
The I/O base must provide for a maximum module consumption of 1.5 W for Foxboro RLY4 2500M/RLY4/XXXXX/XXXXXX, separate from the power switched by its contacts.