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ACTIONI/Q® Q106 AC Powered DC Input Limit Alarm

Provides Relay Contact Closures at a Preset DC Input Level.

  • Field Configurable Input Ranges
  • TouchCALTM Technology
  • Setpoints Programmable HI or LO and Failsafe or Non-Failsafe
  • DIN Rail Mounting with IQRL
  • Universal AC Power 85 to 265 VAC
  • 24VDC Transducer Excitation
  • SnapLocTM Plug-in Terminals
  • ASIC Technology for Enhanced Reliability

The ActionI/Q model Q106 is a DIN rail mount, DC voltage or current input limit alarm with dual setpoints and two contact closure outputs. The field configurable input and alarm functions offer flexible setpoint capability. Input voltage spans from 10mV to 200V and input current spans from 1mA to 100mA can be field configured. Bipolar inputs are also accepted.

The Q106 is configurable as a single or dual setpoint alarm, with HI or LO trips and failsafe or non-failsafe operation. Also included are adjustable deadbands (up to 100% of full scale input) for each setpoint, a 24VDC voltage source (isolated from line power) for transducer excitation, and a universal AC power supply which accepts any voltage between 85 and 265VAC.

TouchCAL Technology
Action has simplified setpoint calibration. Using a pushbutton instead of potentiometers, improvements in calibration resolution and reliability are realized due to the elimination of the potentiometers' mechanical variability.

For calibration, simply input the signal level of the desired trip and press the pushbutton to store it in non-volatile memory. Deadband is entered the same way with another pushbutton press to store.

Diagnostic LEDS
The Q106 is equipped with three front panel LEDs. The green LED is a dual function LED labeled IN, which indicates line power and input signal status. Active AC power is indicated by the illuminated LED. If this LED is off, check AC power and wiring connections. If the input signal is 7% above or below the configured input range the green LED will flash at 8Hz or 4Hz, respectively.

The two red LEDs indicate the relay state of each setpoint. An illuminated red LED indicates the tripped condition for the respective setpoint.

The Q106 is equipped with two SPDT (form C) relays, rated at 120VAC or 28VDC at 5 amperes. Each of these relays is independently controlled by the field configurable setpoint and deadband.

The Q106 limit alarm setpoints can be configured for HI or LO, failsafe or non-failsafe operation. Each of the setpoints has a respective HI or LO deadband. In a tripped condition, the setpoint is exceeded and the appropriate red LED will illuminate. The trip will reset only after the process falls below the HI deadband or rises above the low deadband (see Figure 1). For proper deadband operation, the HI setpoint must be set above the LO setpoint. In failsafe operation, the relay is energized when the process is below the HI setpoint or above the LO setpoint (opposite for non-failsafe). In the failsafe mode, a power failure results in an alarm state output.

Dynamic Deadband
Circuitry in the Q106 prevents false trips by repeatedly sampling the input. The input must be beyond the setpoint for 100 milliseconds, uninterrupted, to qualify as a valid trip condition. Likewise, the input must fall outside the deadband and remain there for 100 milliseconds to return the alarm to an untripped condition. This results in a "dynamic deadband" -based on time- in addition to the normal deadband.

Unless otherwise specified, the factory presets the Model Q106 as follows:

  Dual, SPDT
  A: HI, B: LO
  A, B: 0.25%

The AC power input accepts any AC source between 85 and 265VAC. Note: An I/QRail is required to power the modules. See ordering information.

For other I/O ranges, refer to Table 1 and Figure 5. Reconfigure switch SW1 for the desired input type, range and function.

Figure 1: Limit alarm operation and effect of deadband

WARNING: Do not change switch settings with power applied. Severe damage will result!

1. With the module removed from the rail and not powered, snap off the face plate by lifting the right edge away from the heat sink. Note the input switch (SW1) is located under the face plate. Set positions 9 & 10 for voltage or current input (see Table 1).

2. Set positions 1 through 4 of input range switch "SW1" for the desired input range (see Table 1).

3. Set position 5 of input range switch "SW1" to ON (closed) for unipolar (e.g., zero based, 0-20mA) range or OFF (open) for bipolar (e.g. -100% offset, -20 to 20mA) range.

4. Set positions 6 and 7 of input range switch "SW1" to ON for a HI trip setpoint or OFF for a LO trip setpoint.

5. Set position 8 of input range switch "SW1" to ON for non-failsafe operation or OFF for failsafe operation (e.g., alarm trips on power failure).

1. After configuring the DIP switches, connect the input to a calibrated DC source and apply power. Refer to the terminal wiring in the specifications section.

Note: For best results, calibration should be performed in the operating environment, mounted on a DIN rail, allowing at least one hour for thermal equilibrium of the system.

2. After applying power to the unit all three LEDs will flash for approximately 10 seconds. Adjust the input signal level for the Relay "A" setpoint. The green LED should be on. Press and hold the CAL button for four seconds (until the red LED starts flashing) to enter the calibration mode. The green LED will be on and the red Relay "A" LED will be be flashing.

NOTE: If the green LED is flashing , the input is out of range (i.e. 7% above or below the configured range). Check to make sure the input signal is within the DIP switch configuration range. Double check the DIP switch settings.

3. Setpoint "A": Input the desired trip level for Relay "A" and press the CAL button. The green LED and the red Relay "A" LED will be flashing. Note that the green LED will stop flashing when the input drops below a high setpoint or rises above a low setpoint.


4. Deadband "A": For minimum deadband (approximately 0.25%), press and hold the CAL button for 4 seconds. For high setpoints, lower the input level to the desired deadband point and push the CAL button. For low setpoints increase the input level (green LED turns off) to the desired deadband level and push the CAL button. The green LED will be on and the red Relay "B" LED will be flashing.

5. Setpoint "B": Input the desired trip level for Relay "B" and push the CAL button. The green and the red Relay "B" LED will be flashing. Note that the green LED will stop flashing when the input drops below a high setpoint or rises above a low setpoint.

6. Deadband "B": For minimum deadband (approximately 0.25%), press and hold the CAL button for 4 seconds. For high setpoints lower the input level (green LED turns off) to the desired deadband point and push the CAL button. For low setpoints increase the input level to the desired deadband level and push the CAL button. The green LED will be on and both the red LEDs will be flashing.

7. Press the CAL button once again to exit the calibration mode. Check the setpoint and deadband to validate calibration.

Relay Protection and EMI Suppression
When switching inductive loads, maximum relay life and transient EMI suppression is achieved by using external protection (see Figures 2 and 3). Place all protection devices directly across the load and minimize lead lengths. For AC inductive loads, place a properly rated MOV across the load in parallel with a series RC snubber. Use a 0.01 to 0.1mF pulse film capacitor (foil polypropylene recom- mended) of sufficient voltage, and a 47 ohm, 1/2W carbon resistor. For DC inductive loads, place a diode across the load (PRV > DC supply, 1N4006 recommended) with (+) to cathode and (-) to anode (the RC snubber is an optional enhancement).

Table 1: Q106 Input Range Switch

Figure 2: DC Inductive Loads Figure 3: AC Inductive Loads

Figure 4: Typical Connections for Voltage or Current for Q106


Figure 5: Q106 Input Range/Function Selection (SW1) Factory Default Settings
Note: For voltage inputs Current Enable must be off. For current inputs Voltage Enable must be off.


1. During normal operation, the green LED will be ON or flashing. The Red LEDs will be ON while the relative relays are tripped.

2. In the calibration mode, if no button is pushed within 2 minutes, the unit will revert to normal operatin.

Figure 6: Q106 Calibration Flow Chart
Voltage Input:
Range: 10mV to +200V; Impedance: >100K ohms
Overvoltage: 200V rms, max.
Current Input:
Range: 1mA to +100mA; Impedance: 20 ohms, typical
Overcurrent: 170mA rms, max. Overvoltage: 60VDC (self-resetting fuse) Common Mode (Input to Gnd): 1800VDC, max.
LED Indicators:

Input (Green):
     >110% input: 8Hz flash
     <10% input: 4Hz flash
Setpoint (Red):
Tripped: Solid red
Safe: Off

Limit Differential (Deadband):

>50mV/5mA: 0.25% to 100% of span
<50mV/5mA: 1% to 100% of span

Response Time:

Dynamic Deadband:
     Relay status will change when proper setpoint/process condition exists for      100msec.
Normal Mode (analog filtering): <250mSec, (10-90%)


Effectivity: Setpoints are adjustable over 100% of the selected input span. Repeatability (constant temp.):
     >50mV/5mA: 0.1% of full scale
     <50mV/5mA: 0.2% of full scale

Temperature: +0.05% of full scale/ C, max.
Excitation Voltage:

24VDC, 20mA, maximum

Common Mode Rejection:
DC to 60Hz: 120dB
1800VDC between contacts, input and power
ESD & Transient Susceptibility:
Meets IEC 801-2, Level 3 (8KV)
Humidity (Non-Condensing):
Operating: 15 to 95% @ 45 C
Soak: 90% for 24hours @ 65 C
Temperature Range:
Operating: 0 to 55 C (32 to 131 F)
Storage: -25 to 70 C (-13 to 158 F)
2.5W max.,100 to 240VAC +10%, 50Hz -400Hz
Relay Contacts:
2 SPDT (2 form C) Relays; 1 Relay per setpoint
Current Rating (resistive) 120VAC:5A; 240VAC: 2A; 28VDC: 5A
Material: Gold flash over silver alloy
Electrical Life:105 operations at rated load
Note: External relay contact protection is required for use with inductive loads.
Mechanical Life: 107 operations
Wire Terminations:
Screw terminations for 12-22 AWG
0.56 lbs
Agency Approvals:
UL recognized per standard UL508 (File No E99775)
CE EN61326, EN61010-1


Ordering Information
Models & Accessories
Specify (model number)
  1. Q106-0000
  2. Specify I/QRail type and quantity (required)
  3. Accessories: (see Accessories)
  4. Optional Custom Factory Calibration: Specify C620 with desired input, setpoint and deadband.
ActionI/Q series modules mount on standard TS32 (model MD02) or TS35 (model MD03) DIN rail. In addition, the following accessories are available:
MD02 TS32 DIN rail
MD03 TS35 x 7.5 DIN rail
IQRL-2002 2 Position I/QRail & DIN rail IQRL-2004 4 Position I/QRail & DIN rail IQRL-2008 8 Position I/QRail & DIN rail
Terminal Connection Terminal Connection
A1 Relay A, N.O C4 24 VDC Excitation
A2 Relay A, Common C5 Input (-)
A3 Relay A, N.C. C6 Input (+)
A4 Relay B, N.O. P1 AC Power (Hot)
A5 Relay B, Common P2 Not Used
A6 Relay B, N.C. P3 Not Used
C1, C2, C3 Not Internally Connected P4 AC Power (Neutral)


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