Define Instruments Zen IoT Specifications

Edge Processing Interface

Modular Industrial IoT interface hardware solution

Designed for industrial and commercial IoT monitoring and interface applica­tions where reliability, rapid development and deployment are demanded. The
Zen IoT hardware and monitoring solution delivers robust end to end eld mea­surement to cloud service integration.

›

Industrially hardened design and direct process interface design

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IoT edge processor with real-time OS

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Sophisticated embedded input conditioning and control functions
including signal processing filters and alarms

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Modular construction supports up to 22 measurement inputs, 8 analog
output channels and up to 40 digital IO (including up to 7 relays)

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Low power optimized design

Easily integrates with your existing automation system

Zen IoT

The Zen IoT natively supports MQTT IoT communications protocol. ModBus
RTU master/slave communication interface port provides direct connection
to metering and control automation. Potential applications include remote machine and process monitoring of
pumping, HVAC, IAQ, and energy systems. Onboard logic, math and control functions allow customization to match
application measurement and monitoring requirement.

Field process signals direct to wireless interface

Zen IoT converts, conditions and processes analog signals directly to wireless WiFi (801.11) or (eMTC) LTE Cat-M1. No
additional wireless modem required.

Extra cloud interface security and Store and Forward data integrity

Connection and data security are paramount, the Zen IoT provides peace of mind with Transport Layer Security (TLS)
protocol. During a network communications failure event the Zen IoT Store and Forward functions locally buers
data, forwarding to the cloud server when network communications is reinstated, secure monitoring and recording
with total data integrity.

Key features:

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DCS Define Cloud Services (DCS) connection

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MQTT with Transport Layer Security (TLS 1.2)

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Data record store and forward record buffer

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RTC record data time stamp at origin

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Application logic and math functions

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PC configuration tools, USB interface

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Wireless WiFi (801.11) or (eMTC) LTE Cat-M1

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Up to 22 analog inputs

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Up to 40 digital input/outputs

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8 Isolated process outputs (4-20mA)

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Up to 7 Relay outputs

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RS485 ModBus RTU master/slave interface

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Local display (RS232C) interface port

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AC mains and 24V low power operation

Cloud connection options

WiFi (801.11)

Enables LOS transmission up to 1500 (450m) using the supplied 3dBi wireless antenna.

(eMTC) LTE Cat-M1

4G cellular interface for Internet of Things (IoT) and machine-to-machine (M2M) communications.

Connection to IoT Cloud services

The Zen IoT is precongured to connect to Dene Cloud Services (DCS). Custom connection is available to your own
or third party IoT server. Cloud communication is secured using TLS and uses MQTT IoT service transfer protocol.
JSON packets contain industry standard SenML (Sensor mark-up language) data.

Simple setup with Dene WorkBench soware

Dene WorkBench congures the Zen IoT for analog and digital inputs, alarms, totalizers and counters, custom
scaling for input linearization and scale setup. The cloud interface module congures data transfer to a cloud server.

Ordering Codes for Zen IoT

Model/Option Description
Zen IoT

Zen IoT base conguration:
MQTT cloud service interface
– TLS security layer, store and
forward record buer, RTC data
time stamp, 4x isolated universal
inputs (TC/RTD/V/mA/SCII)

85-265 V AC/DC power supply

10-32 V DC power supply

No Wireless communication

Cellular modem (eMTC) LTE
Cat-M1

WiFi (801.11)

No Additional Analog IO

ADD 4x Universal input (iso­lated)

ADD 8x Universal input (iso­lated)

ADD 12x Universal input (iso­lated)

ADD 16x Process (4-20mA) input
(non-isolated)

ADD 6x Universal input (iso­lated), 4x process (4-20mA)
output (isolated)

ADD 8x Process (4-20mA)
input (non-isolated), 8x process
(4-20mA) output (isolated)

Non­Isolated
Inputs
With Exc.
(4-20mA)

Partially
Isolated
Inputs
(4-20mA)

2 4 ZEN6 ZEN6

2 4 HV

2 4 LV

2 4 –

2 4 CM1

2 4 WIF

2 –

2 8 UI4

2 12 UI8

2 16 UI 12

2 16 4 PI16

2 4 4 UI6E4

2 8 4 8 PI8E8

Total
Universal
Isolated
Input
(TC/
RTD/V/
mA)

Isolated
Output
(4-20mA)

Model Power

supply

Wireless
Comms
WiFi/
LTE

Added
Analog
IO
Option

Required Accessories (Sold Separately)

BRIDGE-KEY

USB Bridge Key, required to program this instrument using free WorkBench soware.

Case Dimensions

3.86" (98mm)

5.51" (140mm)

DIN
Rail

Rail

DIN

2

DIN
Rail

Rail

DIN

F G H

28 29

19 20 21

22 23 24 25 26 27

E

13 14 15 16 17 18

J K

2

I

L

M

1.89"

2.87" (73mm)

(48mm)

5.75" (146mm)

4.72" (120mm)

DIN 35 Rail

4.45" (113mm)

3.98" (101mm)

3.86" (98mm)

(48mm)

1.73"

(73mm)

2.87"

Connectors – main processor

13 14 15 16 17 18

J K

E

F G H

19 20 21

22 23 24 25 26 27

I

L

M

28 29

N O

P Q

R

10 11 12

1 2 3 4 5 6 7

8 9

Color Label Facing Down Color Label Facing Up

(A & B) Relay outputs
(C) Logic output open collector
(D) RS485 Port
(E) Analog (4-20mA) inputs
(F) R232 Display Port
(G) Digital inputs
(H) Power supply (HV shown)

(J & K) Relay 1 & 2
(L) Digital outputs 5-10
(M) Digital inputs 1-8
(N & O) Relays 4 & 3
(P) Digital outputs 11-16
(Q) Digital inputs 9-16
(R) Universal analog inputs

(I) Universal analog inputs

Connectors – expansion IO

1.73" (48mm)

Radio
Status

Mode

2.87" (73mm)

Radio
Status

Mode

Dimensions of model congurations

1.73" wide (48mm) 2.87" wide (73mm) 3.86" wide (98mm)

Zen6-HV Zen6-HV-CM1-UI8 Zen6-HV-WIF-UI8-DIO12

Zen6-HV-CM1 Zen6-LV-CM1-PI16 Zen6-HV-CM1-PI16-DIO12

Zen6-LV-WIF Zen6-HV-WIF-UI6E4 Zen6-HV-CM1-PI8E8-DIO12

3.86" (98mm)

Radio
Status

Mode

Non-isolated mA input

16 17 18

4–20mA

16 17 18

Tx

2 Wire Loop Powered

Transmitter, 4–20mA

Digital and logic input

Reed Switch or

Relay Contact

Selected digital
input channel

COM

22 23 24 25 26 27

D D

D A

D B

D C

+24V EXC

Open Collector O/P

COM

D A

D B

22 23 24 25 26 27

Relay output

16 17 18

+ Signal

- Supply

+ Supply

Tx

3 Wire Loop Powered

Transmitter, 4–20mA

Selected digital
input channel

+24V EXC

D D

D C

8 9

16 17 18

+ Signal

- Signal

+ Supply

Tx

4 Wire Loop Powered

Transmitter, 4–20mA

Digital Output

(5–30V DC)

Selected digital
input channel

COM

22 23 24 25 26 27

D D

D A

D B

D C

+24V EXC

16 17 18

- Supply

4–20mA

NOTE
The Digital Inputs can be congured in soware to be
either Sinking (active low input) or Sourcing (active
high input). The diagrams in this manual are for Sinking

wiring, which is the default conguration. To view
Sourcing wiring, please refer to the help information
provided in Dene WorkBench.

Process mA output

A+ B+ B

Congurable isolated universal input

RTD 3 Wire

Pt100/1000

-

Thermocouple

Potentiometer

RL

+24V

Open collector output
(Sinking <500mA Max)

+24V

Analog Output

supply & load

Load

4−20mA

External

Warranty

Dene Instruments warrants that its products are free from defects in material and workmanship under normal use and service for a period of ve years from the date of
shipment. Dene Instruments' obligations under this warranty are limited to replacement or repair, at its option, at it's factory, of any of the products which are returned to
Dene Instruments' facility (within the applicable period aer shipment), transportation charges prepaid, and which are, aer examination, disclosed to the satisfaction of
Dene Instruments to be defective.

Warranty does not apply to any equipment which has been repaired or altered, (except by Dene Instruments), or which has been subjected to misuse, negligence or accident.
In no case shall Dene Instruments' liability exceed the original purchase price. The aforementioned provisions do not extend the original warranty period of any product which
has been either repaired or replaced by Dene Instruments.

General specications

Power

Power supply 85–265V AC (HV)
10–32V DC (LV)

Power consumption 10W max, 6W
typical

Excitation output

24V DC @ 200mA maximum. Total on

all +24V output pins

Data Logging

31,774 samples with up to 30 param­eters plus time stamp per sample. 32
MB capacity

Available with Real-Time Clock (RTC)
option

RTC time base UTC

Local time in device with automatic
daylight savings adjustment

Analog input

2x (4–20mA) process input

Input resolution 12 bits

Accuracy <±1.0% FSO (unless otherwise

stated in input specications)

Input isolation: Not isolated to power
supply or digital inputs

General specications

Linearity & repeatability <±0.1% FSO

RF immunity <±1% eect FSO typical

Noise immunity (CMRR) 160dB tested

at 300V RMS 50Hz

Permanent memory (E2ROM) 100,000
writes per input parameter

Relay output

Digital input

Functions Status, up counter, up/down
counter with direction, debounced
counter, frequency, gated frequency

Counter register output 32 bit

Frequency range 0–10,000Hz

(Reduced to 0–1,000Hz in Sleep Mode)

Input types NPN, PNP, Clean Contact,
Voltage 2–30V DC

Threshold 1.65V typical

Debounce counter range 0–100Hz

Isolation: Not isolated to power supply

or analog inputs

Comms

Protocols Modbus RTU, MQTT, RS485
or Dene ASCII, EIA485 compliant

Default comm port RS485. Selectable
baud rate 2400–230400 baud
Format 8 bit, no parity, 1 stop bit

RS232 display port meets TIA/EIA-232-F
and ITU v28 standards

Functional isolation: 1,500VDC (1 min)
Electrical isolation 42VAC/ DC (continu­ous)

Programming

USB programmable Via 'PC Setup' port
using Bridge Key USB programmer
(sold separately)

Dene WorkBench Simple congura­tion using Dene WorkBench:

deneinstruments.com/workbench

Wireless comms interface

WiFi (801.11)

Cellular modem (eMTC) LTE Cat-M1
Regions NA, E1 and AU

Over Air Updates

Over The Air updates are available for
main plugins, custom macros, certi­cates, cloud adapter rmware updates
(WiFi and cellular)

MQTT interface

Based on MQTT 3.1.1 with QoS 0 & 1

Construction

Casing DIN 35 rail mounting;
Material: ABS inammability V0 (UL94)

Phoenix type removable screw terminal
connectors

Dimensions (H x W x D)

6 input channels

3.98 x 1.73 x 4.72" (101 x 48 x 120mm)*

14 input channels

3.98 x 2.87 x 4.72" (101 x 73 x 120mm)*

22 input channels

3.98 x 3.86 x 4.72" (101 x 98 x 120mm)*

*Excludes antenna and connectors

Required mounting height with
antenna

4.65" (118mm), WiFi model only

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

Compliance approvals

EN-61326-1:2006

EMC: EN61326-1: 2006 Class A

EN61326-1: 2006 Industrial Locations

1 x Change over Form C Relay (15A
250V AC or 15A 30V DC)

2x Form A Relays (3A 250V AC or 3A
30V DC)

Logic output

1 x Logic output Open collector,
(80mA maximum capacity)

TLS security protocol

Transport Layer Security (TLS) V1.2
with server certicate and X.509 client
certicate authentication

EN50581: 2012 RoHS

Safety: EN61010, 1:2010, CuL (le
listing pending)

General specications

Input

Input isolation 2,500V AC 1 minute
between all input channels

Isolation test voltage 1000V DC for
1min (Analog input to digital input,
analog input to analog input)

Input resolution 16 bits

Accurate to <±0.1% FSO

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 >500KΩ

T/C lead resistance 100Ω max

Cold junction compensation 14 to

140°F (–10 to 60°C)

CJC dri <0.02°c

Accuracy 0.1% of FSO ±1°C typical

Sensor open Upscale

RTD Input

RTD input type Pt100 3 wire RTD DIN
43760: 1980 RTD Pt1000 3 wire RTD

standard

Range

-328–572°F (-200–300°C) = 0.02°F
(0.01°C) resolution

-328–1472°F (-200–800°C) = 0.1°F
(0.1°C) resolution

Lead resistance 10Ω/lead max recom­mended

Sensor current 0.6mA continuous

Sensor fail upscale

Current Input

Range 0–20mA, 4–20mA

Input impedance 45Ω

Max over-range Protected by PTC to

24V DC

Linearity & repeatability 0.1% FSO max

Accuracy 0.1% FSO max

Channel separation 0.001% max

Ambient dri 0.003%/°C FSO typical

RF immunity 1% eect FSO typical

Voltage Input

Ranges ±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

Accuracy 0.1% FSO max

Channel separation 0.001% max

Ambient dri 0.003%/°C FSO typical

RF immunity 1% eect FSO typical

Potentiometer input

Potentiometer input 3-wire

Excitation voltage Variable

Potentiometer resistance <2kΩ low

pot, >2kΩ high pot

Field programmable zero 0–90% of
span

Field programmable span 0.1–100%

Linearity & repeatability <±0.05% fso

Response time 100msec

Ambient dri <50ppm

Sensors Open collector (NPN, PNP),

TTL or Clean Contact

Debounce counter range 0–50Hz max

Counter register output 32 bit

Accuracy ±0.5%

Analog Output

Analog output type Loop powered,
isolated 4–20mA or 20–4mA DC

Isolation Isolated to Digital IO GND

Isolation test voltage 1400Vrms for

1min. Working voltage 125V DC

Resolution 15 bits, 16000 steps

Loop drop 10V max

Linearity & repeatability 0.1% FSO max

Accuracy 0.1% FSO max

Digital I/O Expansion (optional)

4 x Form A Relays 3A (3A 250V AC or
3A 30V DC)

16 x Bipolar digital inputs 24V compat­ible. Up to 2.5KV RMS isolation. Inputs
are separated into 2 isolated groups of
8 channels

12 x Digital open collector outputs.

Outputs are separated into 2 groups of

6. 0.5A max on each group. Non isolated.

Non-isolated Process input

Range 0–20mA, 4–20mA

Input impedance 45Ω

Max over-range Protected by PTC to

24V DC

Linearity & repeatability 0.1% FSO max

Isolation - none to other process

inputs, 2500V AC 1 minute to all other
input/output

Ambient dri 0.003%/°C FSO typical

Accuracy

-328–572°F (-200–300°C) = ±0.1°C

-328–1472°F (-200–800°C) = ±0.3°C

Ambient dri 0.003°C/°C typical

Digital Pulse Input

Frequency range 0–2500.0Hz

Fast counter range 0–2500.0Hz

Frequency resolution 0.1Hz

Email: sales@deneinstruments.com | Dene Instruments Inc, 11516 Forest Heights Drive, Dallas, TX 75229

ZEN-SDS-191101 v4 © Dene Instruments