X-12S™ | 8 Relay Expansion Module

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Irrigation, Dry Contact Closures, & More

  • X-12S

The X-12s™ eight-relay expansion module is used with an X-400™ or X-600M™ controller. The relays are 2.5A Form-A (SPDT) with commons tied together in two groups. A removable terminal connector provides connections to the relays. One or more X-12s expansion modules can be connected with a ribbon cable that provides both power and communication.
8 Relays

  • Expansion Module for the X-400 or X-600M

An X-400 or X-600M connected with an expansion module like the X-12S provides an easy, flexible, and reliable way to monitor and control systems and devices over a network. The X-12S is a great fit in applications with moderate loads, including alarm panels, low-power LED lighting, and simple dry contact closures.

X-12S Features

  • Eight large SPDT relays (independently controlled)Voltage: 125VAC, 30VDC
  • Current: 2.5A (total for each group of 4 relays with shared commons)
  • Removable connector
  • Eight Relay LEDs
  • Powered through expansion bus (no separate power supply connections are required)


Power Requirements

  • Voltage: 9-28 VDC (supplied via the X-400 or X-600M controller, 24V recommended)
  • Max Current: See table below for typical values at 25°C.
Power Supply All Relays OFF All Relays ON
9 VDC 16 mA 344 mA
12 VDC 12 mA 258 mA
24 VDC 7 mA 133 mA

Relay Contacts

  • Number of Relays: 8
  • Max Voltage: 125VAC, 30VDC
  • Max Current: 2.5A (total for each group of 4 relays with shared commons)
  • Contact Type: SPST (Form A)
  • Load Type: General Purpose
  • Contact Resistance: < 100 milliohms initial
  • Contact Material: AgNi
  • Electrical Life: 100K operations (Min)
  • Mechanical Life: 5M cycles (Min)
  • Environmental Rating: Over voltage Category II, Pollution Degree 2
  • Relay Modes: On/Off or Pulsed
  • Pulse Timer Duration: 0.1 to 86,400 Seconds (1-day)


  • Relays: 14-Position, 3.81mm terminal spacing, Removable. For 16-28 AWG wire.
  • Expansion Connector: Ribbon cable, 10-conductor, polarized, 2×5-position, 0.100″ pitch Provides power and communications for expansion modules (Communications: RS-485)

LED Indicators

  • Number of LEDs: 9
    • Power on
    • Relay coil energized 1-8


  • Size:
    • 1.41in (35.7mm) wide
    • 3.88in (98.5mm) tall
    • 3.1in (78mm) deep (not including connector)
  • Weight: 4.8 oz (136 g)
  • Enclosure Material: Lexan 940 Polycarbonate Plastic
  • Enclosure Flame Rating: UL94 V0


  • Operating Temperature: -40°F to 122°F (-40°C to 50°C)
  • Storage Temperature: -40°F to 185°F (-40°C to 85°C)
  • Humidity: 5-95%, non-condensing
  • Altitude: Up to 2,000m
  • Indoor use or NEMA-4 protected location

Electromagnetic Compliance

  • IEC CISPR 22, CISPR 24
  • FCC 47CFR15 (Class B)
  • EN55024 ITE Immunity (2010)
  • EN55022 Emissions (2010)

Product Safety Compliance

  • UL 61010-1 (Electrical Equipment for Measurement, Control, and Laboratory Use)