X-17S™ | 4 Relay, 4 Input Expansion Module

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  • X-17S

The X-17S™ expansion module is used with an X-400™ or X-600M™ controller. The four relays have Form-A contacts (SPST) and can be used to control moderate loads. Each input is optically isolated and allow the grounding system of equipment and the low-voltage circuits of the X-17S to be electrically separate. One or more X-17S expansion modules can be connected with a ribbon cable that provides both power and communication.

  • 4 Relays
  • 4 Digital Inputs
  • Expansion Module for the X-400 and X-600M

The X-17S is a versatile expansion module, offering the flexibility to monitor sensors and control devices over a network when paired with the X-400 or X-600M. Common applications include center pivot, simple tank monitoring, and moderate-light loads like solenoid valves, alarms, and indicator lights.

X-17S Features

  • Four isolated relays (SPST)
  • Relay Functions: On, Off, Pulse
  • Four optically-isolated digital inputs (common negative)
  • Input Functions: On/Off Status, Pulse Count, Pulse Duration, Accumulated Pulse Time, Frequency
  • Powered through expansion bus (no separate power supply connections are required)
  • Eight LEDs for inputs and outputs
  • Removable terminal connector


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 Opto-couplers & Relays OFF All Opto-couplers & Relays ON
9 VDC 18 mA 224 mA
12 VDC 14 mA 165 mA
24 VDC 8 mA 86 mA

Relay Contacts

  • Number of Relays: 4
  • Max Voltage: 125VAC, 30VDC
  • Max Current: 2.5A
  • Contact Type: SPST (Form A)
  • Load Type: General purpose
  • Contact Resistance: < 100 milliohms initial
  • Contact Material: AgSnO2
  • 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)

Digital Inputs

  • Number of Inputs: 4
  • Type: Optically-Isolated
  • Voltage Range: 3-26VDC
  • Current: 0.6mA @ 3V, 8.2mA @ 26V
  • Minimum Hold Time: 2.5mS
  • Input Isolation: 1500V
  • Input Functions: Monitor State, Control Relays, Control Remote Relays, Count, Frequency, High Time, ON Time
  • Maximum Count: 32-bit
  • Max Count Rate: 200Hz
  • Edge Trigger: Rising, Falling or Both
  • High Time: Pulse width (4,194,304 seconds max)
  • On Time: Accumulated time an input is asserted (4,194,304 seconds max)
  • Frequency: 1 Hz min, 200 Hz max


  • Relays & Inputs: 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 1-4
    • Digital Inputs 1-4


  • 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 150°F (-40°C to 65.5°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

  • IEC 61010-1