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  • Zen RTU Mini for SCADA and PLCs, Universal Input Analog Signal Controller

    Compact unit, 4,12 & 16 isolated inputs

    Zen RTU Mini 4 (1x RS485/232) *

    CUSTOMIZABLE PRODUCT: This product is available in custom configurations for OEMs and high volume orders (over 100 pieces). If you have a difficult application that requires our engineering input, please call 1-888-652-4757 so we can assist you.

    Input Channels & Port 1 Configuration
    (Please Select)

    Enables sophisticated monitoring and control of up to 16 input analog signals from a variety of sources

    Get multiple analog signals into your PLC or SCADA system

    The Zen RTU Mini is ideal for applications requiring collation of multiple signal types routed directly to a master console for connecting straight to SCADA systems and PLCs.

    It has 16 analog inputs, 4 digital inputs and an RS485 Modbus/RTU port. Additionally, it has an Ethernet port that can be selected as Modbus TCP.

    Smaller with bigger cost savings

    Zen RTU Mini goes where other cannot. With a footprint of only 3.98 x 1.38 x 4.72", the Zen RTU Mini fits into smaller enclosures and saves DIN rail space, shaving more off the cost of installation.

    Kill the cost of cabling

    There’s no need to run wires to this unit, the Zen RTU Mini has a Wifi option, retaining the portability of your application and unburdening you from the cost of cabling.

    Enjoy the flexibility of universal inputs

    The Zen RTU Mini accepts TC, RTD, mA, mV, V, Frequency and Counter. This reduces the number of separate instruments required, keeping things simple for maintenance and troubleshooting.

    Cleans up noise

    Each of the Zen RTU Mini's channels is isolated, so there’s zero cross-talk. The isolation ensures high reliability in harsh industrial environments.

    In addition to this software a Bridge Key is required for the configuration of this product. You must order one unless you already have one from a previous product purchase.

    Modbus Member
    Number of input channels
    Input configuration
    Isolated universal inputs: Current, Voltage, RTD, Thermocouple, Potentiometer, Digital Pulse, Current Sensor or Attenuator input
    See below for input specifications for each input type
    Input isolation
    2,500V AC for 1 minute between all input channels
    Isolation test voltage
    1000V DC for 1min between analog inputs
    16 bits
    Accurate to
    <±0.1% fso (unless otherwise stated for specific input dd>
    Power supply
    LV= 10–32V DC
    General Specifications
    Noise immunity
    (CMRR) 160dB tested at 300V RMS 50Hz
    RF immunity
    <±1% effect fso dd>
    Permanent memory
    (E²ROM) 100,000 writes per input parameter
    Linearity & repeatability
    <±0.1% dd>
    Channel Separation
    125db minimum
    Thermocouple Input
    Thermocouple types

    B= 32 to 3272°F (0 to 1800°C)
    E= -328 to 1292°F (-200 to 700°C)
    J= -328 to 1832°F (-200 to 1000°C)
    K= -328 to 2300°F (-200 to 1260°C)
    N= -328 to 2372°F (-200 to 1300°C)
    R= 32 to 3092°F (0 to 1700°C)
    S= 32 to 3092°F (0 to 1700°C)
    T= -328 to 752°F (-200 to 400°C)
    Input impedance
    T/C lead resistance
    100Ω max
    Cold junction compensation
    14 to 140°F (–10 to 60°C)
    CJC drift
    <0.02°c °c typical for all dd>
    0.1% of FSO ±1°C typical
    Sensor open
    RTD Input
    RTD input type
    Pt100 3 wire RTD DIN 43760: 1980
    Pt1000 3 wire RTD standard

    -328 to 572°F (-200 to 300°C), 0.02°F (0.01°C) resolution
    -328 to 1472°F (-200 to 800°C), 0.1°F (0.1°C) resolution
    Lead wire resistance
    10Ω/lead max recommended
    Sensor current
    0.6mA continuous
    Sensor fail
    -328–572°F (-200–300°C) = ±0.1°C
    -328–1472°F (-200–800°C) = ±0.3°C
    Ambient drift
    0.003°C/°C typical
    Current Input
    0–20mA, 4–20mA
    Input impedance
    Max over-range
    Protected by PTC to 24V DC
    Linearity & repeatability
    0.1% FSO max
    0.1% FSO max
    Channel separation
    0.001% max
    Ambient drift
    0.003%/°C FSO typical
    RF immunity
    1% effect FSO typical
    Fail safe micro switch
    Prevents external loops from being interrupted in the event of a power loss to the Zen
    Voltage Input
    ±200mV, –200mV to 1V, 0–10V, 0–18V
    Input impedance
    >500KΩ on all ranges
    Maximum over voltage
    24V DC
    Linearity & repeatability
    0.1% FSO max
    0.1% FSO max
    Channel separation
    0.001% max
    Ambient drift
    0.003%/°C FSO typical
    RF immunity
    1% effect FSO typical
    Digital Pulse Input
    Frequency range
    Fast counter range
    Open collector (NPN, PNP), TTL or Clean Contact
    Frequency resolution
    Debounce counter range
    0–50Hz max
    Counter register output
    32 bit
    AC Current Sensor Input
    Sensor type
    Current transformer ACCS-420, ACCS-420-L and ACCS-010
    Amperage range
    Header selectable
    ACCS-420/010= 100/150/200A
    ACCS-420-L= 10/20/50A
    ACCS-420/010= 175/300/400A respectively
    ACCS-420-L = 80/120/200A respectively
    (Representing 0–100% of full scale input range)
    ACCS-420(-L)= 4–20mA DC loop powered
    ACCS-010= 0–10V DC
    Power supply

    ACCS-420(-L)= Loop powered, 15–36V DC
    ACCS-010= Self powered
    1% of full scale
    Response time
    250ms (10–90%)
    Isolation voltage
    Potentiometer Input
    Potentiometer input
    Excitation voltage
    Potentiometer resistance
    <2kω low pot;>2kΩ high pot
    Field programmable zero
    0–90% of span
    Field programmable span
    Linearity & repeatability
    <±0.05% fso dd>
    Response time
    Ambient drift
    <50ppm dd>
    Attenuator Input
    Attenuator type
    Define Instruments HVA-1000
    Max input voltage
    1000V DC
    Attenuation factor
    1000 ±0.1%
    Input impedance
    Output impedance
    Attenuator type
    Differential resistive
    Ambient drift
    50ppm/°C max
    Comm Port(s)
    Ethernet Modbus/TCP, WiFi, RS232 or RS485
    Port 1
    Select either:
    No Port 1 Comm OR
    EMOD= Ethernet Modbus (10/100/Auto)
    Port 2
    RS232 / RS485 auto-select
    Selectable baud rate 2400–230000 baud. Format: 8 bit, no parity, 1 stop
    Isolation test voltage
    1000V DC for 1min between comms and analog/digital input
    Digital Inputs
    Number of digital inputs
    4 x Opto isolated inputs
    Digital control input type
    Selectable active state (high or low)
    LED indication
    of each digital input
    Status, up counter, up/down counter with direction, debounced counter, frequency, gated frequency
    Counter register output
    32 bit
    Frequency range
    Input voltage
    5–30V DC
    1.35V typical
    Debounce counter range
    At 5V DC= 1.1mA; At 24V DC= 7mA
    Isolation test voltage
    1000V DC for 1min between digital input and analog input
    USB programmable
    Via USB prog port using Bridge Key USB programmer (sold separately)
    Define WorkBench
    Simple configuration using Define WorkBench
    14 to 140°F (–10 to 60°C)
    Dimensions (H x W x D)
    3.98 x 1.38 x 4.72" (59 x 255 x 144mm), with plugs in
    25.8oz (730g)
    With EMOD or EIP = Add 0.2oz (6g)
    Environmental Conditions
    Operating temperature
    -40 to 176°F (–40 to 80°C)
    Storage temperature
    -40 to 176°F (–40 to 80°C)
    Operating humidity
    5–85% RH max, non-condensing
    Certifications & Compliances
    EN 61326-1
    Complies with EN-61326-1:2006
    Emissions EN 558022-A; Immunity EN 50082-1; Safety EN 60950

    Zen RTU Mini Manual Zen RTU Mini Manual 17V01, 02-Feb-2017 | (1914 KB)

    Zen RTU Mini Datasheet Zen RTU Mini Datasheet 17V01, 15-Feb-2017 | (602 KB)

    Define WorkBench

    Define WorkBench

    Simple software to program your Zen series device

    Use Define WorkBench to simulate, configure and view data for all Zen series control stations, including:

    With a user-friendly, uncluttered design, WorkBench offers a simple interface for setting up and scaling your Zen unit, as well as retrieving and graphing your datalog.

    N.B. Version 3 features Simulation Mode and is only compatible with legacy ZEN-16 firmware 2.0.0 and later.

    -4 4 x Universal Isolated Inputs, 4 digital inputs, 1 relay, 3 solid state relays, Up to 2 comm ports.Case width 1.38" (35mm)
    -12 12 x Universal Isolated Inputs, 4 digital inputs, 1 relay, 3 solid state relays, Up to 2 comm ports.Case width 2.36" (60mm)
    -16 16 x Universal Isolated Inputs, 4 digital inputs, 1 relay, 3 solid state relays, Up to 2 comm ports.Case width 3.35" (85mm)
    Comms Configuration
      1 x RS485 / RS232 (included by default)
    -WIFI 1 x RS485 / RS232, WiFi (3dBi antenna included)
    -EMOD 1 x RS485 / RS232, Ethernet Modbus/TCP
    Sample order codes: ZEN-RTU-MINI4-WIFI, ZEN-RTU-MIN12-EMOD
    Bridge Key USB Bridge Key and communications kit (Sold separately)
    GT-HE910-NAD GateTel cellular modem for 3G/4G connections (Sold separately)
    Define WorkBench Simple utility for setting up your Zen RTU

    Zen RTU Mini 4 (1x RS485/232) *

All prices are in US Dollars. For pricing in other currencies, please contact us.