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Rectangular metal controller board with Ethernet and serial ports, mounted on a flat base

MERCURY

MERCURY EP1502 2 in 1 accessory Ethernet dual reader controller

SKU CH-4BDM-8NKR2 MPN EP1502

Ethernet dual-reader controller with eight inputs, four relay outputs and RS-232/RS-485 host links

  • Ethernet and serial links connect to host systems
  • Dual reader ports support two credential readers
  • Eight inputs and four relay outputs control doors
  • Operates from 12-24 VDC with 500 mA maximum draw
  • Rated for 0-70 °C operation and 5-95 % humidity

Dual-reader controller for access systems

The Mercury EP1502 is an intelligent controller designed for access-control installations that require two reader ports. It suits integrators and facility managers who need a single unit to manage entry points with Ethernet, RS-232 and RS-485 host communication. The board operates on 12-24 VDC with a 500 mA maximum draw.

Build and connectivity for daily use

A rugged design handles storage temperatures from -55 °C to 85 °C and operational temperatures from 0 °C to 70 °C at 5 to 95 % RHNC. Four Form C relays rated at 5 A 30 VDC drive locks or ancillary devices, while eight general-purpose inputs and two dedicated inputs monitor sensors. Two-wire RS-485 reader ports run at 2,400 to 38,400 bps, and primary Ethernet uses 10/100 Base-TX on 18 AWG twisted pair.

Upgrade path and when to choose it

The EP1502 replaces older single-reader or serial-only controllers by adding dual-reader capacity and native 10/100 Ethernet in one enclosure. The jump is worth it when a site needs both networked management and two-wire RS-485 reader support without adding separate modules. It is not for installations that require more than two reader ports or Power over Ethernet.

Highlights

  • Ethernet and serial links connect to host systems
  • Dual reader ports support two credential readers
  • Eight inputs and four relay outputs control doors
  • Operates from 12-24 VDC with 500 mA maximum draw
  • Rated for 0-70 °C operation and 5-95 % humidity

Specifications

No published specifications for this item yet.

Questions about this item

What Ethernet standard does the EP1502 use for host communication and what speed does it cap at?

The EP1502 uses 10BaseT/100Base-TX Ethernet for host communication, capping at 100 Mbps.

What voltage range and current draw does the EP1502 require for primary power?

The EP1502 requires 12-24 VDC +/- 10% with a maximum current draw of 500mA.

How do you wire the RS-485 SIO communication on the EP1502 and what polarity mistake should you avoid?

Connect the 2-wire RS-485 SIO bus using twisted pair; reversing the A/B polarity is the common error that prevents communication.

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