Discrete Automation Module Type 2 with Isolated Outputs (DAM-2ISO)

Features and Benefits

  • Logic and Batch Control
  • Eight Isolated Hybrid Style Relays for AC Inductive Loads
  • Ten Auto-Detecting AC/DC Voltage Inputs
  • Integrated User Interface (Push Buttons and Displays)
  • Fully Sealed Enclosure (NEMA 4X, 6, 13 Protection)
  • -40°C to +65°C (-40°F to +149°F) Operating Range
  • MIL-STD-901D Grade A for High Impact Shock
  • MIL-STD-167B for Vibration
  • MIL-STD-461E for Electro-Magnetic Interference (EMI)
  • Powerful and easy-to-use graphical programming
  • Supports Hot Swapping

The Chameleon Discrete Automation Module (DAM-2) offers high-performance logic and batch control. The DAM-2 module contains ten digital inputs, eight digital relay outputs, four user-programmable push-buttons, and eight user-addressable tri-color digital readouts that are configured in software. It is powered by an ARM processor with sufficient computational power to handle the most demanding applications. The DAM-2 embedded firmware is stored in its flash memory and is upgradeable: you can rest assured that the hardware investment you make in Chameleon will not become obsolete.

The DAM-2 module offers unique features generally not available in competing controller designs. Its ten universal digital inputs are capable of accepting a broad range of AC and DC signals with no reconfiguration or rewiring required. Its eight digital outputs can be individually configured (in software) for AC or DC operation. The digital outputs offer a unique hybrid design consisting of Form C mechanical relays with contacts shunted by solid-state transistors. This topology offers several advantages over pure solid-state or mechanical contacts:

  • In AC mode, hybrid contacts offer dramatically improved endurance as they see virtually no switching arc
  • AC hybrid outputs drastically reduce conducted and radiated EMI produced when switching inductive loads by maintaining zero voltage crossing turn-on and zero current crossing turn-off
  • AC hybrid outputs offer very low contact resistance (when compared to pure solid state outputs) resulting in small power dissipation across contacts
  • In DC mode, mechanical contact life is enhanced thru the use of on-board surge suppression circuitry

The DAM-2 module is available in two wiring configurations for the digital outputs: isolated and banked. In the isolated wiring hub configuration, every relay output has a unique common, normally open, and normally closed terminal connection point. The banked wiring hub configuration provides two power termination groups and arranges the digital outputs into two banks of four relays—the relays in each bank have their common terminal tied together (but each relay maintains unique terminal points for the NO and NC contacts). While the isolated wiring hub configuration provides the most power sourcing flexibility, the banked wiring hub is advantageous in applications that have common power sources by eliminating the need to splice wires. When ordering, use DAM-2ISO for the isolated wiring hub configuration and DAM-2BK for the banked wiring hub configuration.

Each DAM-2 module provides convenient tag holders that can be associated with its digital readouts and push buttons. Multiple modules can be attached to each other to expand I/O capacity and to provide redundant I/O connections. They can also be combined with other Chameleon modules to form a full-featured programmable automation controller. As with all Chameleon modules, DAM-2 units are hot-swappable.

Operating Ambient Temperature Range -40°C to 65°C
Storage/Transport Ambient Temperature Range -40°C to 85°C
High Impact Shock MIL-STD-901D, Grade A
Mechanical Vibration MIL-STD-167B, 0-50Hz
Electro-Magnetic Interference MIL-STD-461E
Facial/Housing Protection NEMA 1,2,4,4X,5,6,12,12K,13
Quantity 10
Maximum Allowable Continuous Input Voltage 200 VDC or 140 VAC RMS
Maximum Allowable Voltage Spike 1000V peak 1.2µS x 50µS pulse per MIL-STD-1399 Section 300
Logic High Voltage Range 5-200 VDC or 24-130 VAC RMS 55-500 Hz
Minimum Input Duration for Logic High Detection 4 ms
Logic Low Voltage Range 0-1 VDC or 0-0.5 VAC RMS 55-500 Hz
Minimum Input Duration For Logic Low Detection 56 ms
Minimum Input Current Required (AC and DC inputs)


Electrical Isolation: Two sets of 5 input banks: Bank to Bank Isolation Any input to control circuitry or chassis ground

350 VRMS for 1 minute 1240 VRMS for 1 minute

Quantity / Type 8 Form “C” Hybrid Relays (Electromechanical / Solid-State)
DC Mode Close Time / Open Time 5 ms typical (excluding bounce) / 7 ms typical (excluding bounce)
AC Hybrid Mode Close Time / Open Time 9 ms typical (excluding bounce) / 19 ms typical (excluding bounce)
Voltage Rating 140 VAC Inductive or Resistive, 28VDC Resistive (DC Inductive Loads Require External Clamp)
Minimum Voltage to Guarantee Contact Conduction 5V @ 100mA after break-in (silver nickel contacts)
Typical Contact Resistance 20 mΩ @ 5A RMS
Minimum Contact Ratings
Load: Operations: Standard:
4.4A, 140VAC on the C/O contact
20/2A, 140VAC, PF=0.3 on the N/O contact
1.0 x 105
1.2 x 105
5 VDE 0435
AC 15
Estimated Contact Rating (Hybrid Mode) TBD Operations
Maximum Allowed Continuous Current (Any Single Relay) 4.4 Amps RMS
Maximum Allowed Combined Current (ALL Relays) 16 Amps RMS with no single relay conducting more than 4.4 Amps
   NOTE:  If any single relay conducts more than 2A, refer to DAM-2 Power Spread Calculator for Allowable Configurations
Maximum Allowed Inrush Current (Any Single Relay) 20 Amps RMS for 400 ms on make
Maximum Allowed Current During Hot Swap (Any Single Relay) 4.4 Amps RMS
Inductive Load Minimum Power Factor (AC Only) 40%
Electrical Isolation: Any Output to Control Circuitry or Chassis Ground Digital Output to Digital Output 1240 VRMS for 1 minute 350 VRMS for 1 minute
Maximum Power Consumption 1.3W + 0.03 W/mA x (current draw from aux. power source) + 0.05 W / relay x (number of relays in use)
Maximum Allowable Auxiliary Current 250mA at 24VDC
Real-Time Clock Battery Life(Minimum; No power applied, 25°C)

10 Years

Supported Cable Diameters Two glands 0.24”-0.47” and six glands 0.16”-0.31”
Supported Wire Gauges

16-28 AWG

Digital Readouts Eight user programmable three-color (red/yellow/green) LEDs with label holders
Push-Buttons Four user-programmable on/off buttons with label holders
Status Readout One three-color (red/yellow/green) LED Indicator
IR Wireless Interface 115kbps SIR
Weight 2.35 lbs
Front Panel Dimensions 4” W x 6” L
Enclosure Height 3″ H

The following part numbers can be used when ordering the DAM-2ISO.

The following base module part numbers include the enclosure with EMI wiring glands, active board, and wiring hub:

Fairmount Part Number


DAM-2ISO or 01012-019

Chameleon Discrete Automation Module (Type 2) with Isolated Wiring Hub

Spare/Replacement Parts:

Fairmount Part Number


11047-200 Chameleon Discrete Automation Module (DAM-2) Active Board And Cover — Replacement faceplate for DAM-2BK and DAM-2ISO
11049-100 Chameleon Discrete Automation Module (DAM-1_2ISO) Isolated Relay Wiring Hub Assembly — Replacement W/H for DAM-1ISO and DAM-2ISO