Unitronics UniStream USC-C3-R20 User manual

Unitronics
1
UniStream®
PLC
Installation Guide
USC-B3-R20, USC-B3-T20,
USC-C3-R20, USC-C3-T20
This guide provides basic installation information for specific UniStream®PLC models
with built-in I/O. Technical specifications may be downloaded from the Unitronics
website.
General Features
Unitronics’ UniStream®PLCs are DIN-rail mounted Programmable Logic Controllers
(PLCs) with a built-in I/O configuration.
The series is available in three versions: Pro, Standard, and Basic.
Note that a model number that includes:
•B10/C10 refers to Pro version (e.g. USC-B10-T24)
•B5/C5 refers to Standard version (e.g. USC-B5-RA28)
•B3/C3 refers to Basic version (e.g. only for USC-B3-T20)
Page 2 contains a comparison table detailing the features offered by the different
models. Exact features are detailed in the product specification sheets.
Power
Features
▪Built-in Trends and Gauges, auto-tuned PID, data tables, data
sampling, and Recipes
▪UniApps™: Access & edit data, monitor, troubleshoot & debug
and more
▪Security: Multi-level password protection
▪Alarms: Built-in system, ANSI/ISA standards
COM
Options
▪Built-in ports: 2 Ethernet, 1 USB host, 1 USB device port
▪Add-on ports (UAC-CB), available by separate order:
➢1 CANbus port may be added to all models
➢RS232/485 ports: according to model technical specifications
COM
Protocols
▪Fieldbus: CANopen, CAN Layer2, MODBUS, EtherNetIP and
more. Implement any serial RS232/485, TCP/IP, or CANbus
third-party protocols via Message Composer
▪Advanced: SNMP Agent/Trap, e-mail, SMS, modems,
GPRS/GSM, FTP Server/Client, Web Server, SQL, and MQTT.
▪Remote Access via any device that supports VNC.
Programming
Software
All-in-One UniLogic software for hardware configuration,
communications, PLC and HMI applications; free download.
HMI
All UniStream®PLCs can display HMI screens on the following devices:
•UniStream Display (USL)
•UniStream Modular HMI panel (USP)
•UniStream Built-in (on the panels integral to the device)
•Any device screen that supports VNC

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HMI
HMI screens are designed in UniLogic. In addition to the HMI
screens, UniStream®PLCs offer built-in HMI features, including:
•UniApps™: Access & edit data, monitor, troubleshoot,
debug, and more
•Security: Multi-level password protection
•Alarms: Built-in system, ANSI/ISA standards
USB Action
files
Programmers can create files in UniLogic and save them to a USB mass
storage device, such as a flash drive. This enables the end user to
implement certain actions such as to update firmware, update network
settings, download applications, extract log files and more.
Comparison
table
Feature
B10/C10
Pro
B5/C5
Standard
B3/C3
Basic
I/O Expansion via Uni-
I/O
Yes
No
Remote I/O Expansion
via Ethernet I/O Adapter
(URB)
Up to 8
1
VFD
32
2
MicroSD
Yes
No*
Add-on COM modules
3
2
System Memory
6GB
3GB
3GB
MODBUS Slaves
Unlimited
Up to 8
Ethernet/IP Scanners
16
1
Ethernet/IP Adapters
32
8
Web Server
Yes
No
No
SQL Client
Yes
No
No
MQTT
Yes
PID Loops
64
2
Data Sampler/Trends
Yes
No
CSV files: creating/
reading
Yes
No
FTP, server/client
Yes
No
Saving Data Tables to SD
Yes
No*
Screenshots
Yes
No
Sending email
attachments
Yes
No
USB device
(programming port)
Yes
No**
* Note that B3/C3 models do not support features requiring SD cards. In addition, Alarm
History is not retained after PLC reset.
** Note that B3/C3 models may be programmed only via Ethernet cable.

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Before You Begin
Before installing the device, the user must:
▪Read and understand this document.
▪Verify the Kit Contents.
Alert Symbols and General Restrictions
When any of the following symbols appear, read the associated information carefully.
Symbol
Meaning
Description
Danger
The identified danger causes physical and property damage.
Warning
The identified danger could cause physical and property damage.
Caution
Caution
Use caution.
▪All examples and diagrams are intended to aid understanding, and do not guarantee
operation. Unitronics accepts no responsibility for actual use of this product based on
these examples.
▪Please dispose of this product according to local and national standards and
regulations.
▪This product should be installed only by qualified personnel.
▪Failure to comply with appropriate safety guidelines can cause severe injury or
property damage.
▪Do not attempt to use this device with parameters that exceed permissible
levels.
▪Do not connect/disconnect the device when power is on.
Environmental Considerations
▪Ventilation: 10mm space is required between the device top/bottom edges and
the enclosure’s walls
▪Do not install in areas with: excessive or conductive dust, corrosive or
flammable gas, moisture or rain, excessive heat, regular impact shocks or
excessive vibration, in accordance with the standards and limitations given in
the product’s technical specification sheet.
▪Do not place in water or let water leak onto the unit.
▪Do not allow debris to fall inside the unit during installation.
▪Install at maximum distance from high-voltage cables and power equipment.
Kit Contents
▪1 UniStream PLC
▪1 power terminal block
▪2 I/O terminal blocks (provided only with
models comprising built-in I/Os)
▪1 Battery

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Product Diagram
1
Output LEDs
Green / Red LEDs
Front View
2
Status LEDs
Tricolor LEDs,
Green/Red/Orange
From top to bottom: RUN,
ERROR, USB, BATT. LOW, and
FORCE.
Note that LED indications are
listed in the product's technical
specifications..
3
DIN-rail clips
Clips at top and bottom
physically support the device
4
Input LEDs
Green / Red LEDs
5
Top Door,
Closed
Covers the Confirm button and
the USB Host port
6
Bottom
Door, Closed
Covers the internal door
protecting the battery.
7
Uni-COM™
Jack
Connection port for Uni-COM CB
modules*. Shipped covered;
leave cover in place when not in
use.
Top View
8
Ethernet
ports
Two ports for Ethernet
communications.
9
Input/Output
connection
points
Model-dependent. Present in
models with built-in I/O
configurations.
1
0
CONFIRM
Button
Used to implement and confirm
USB Actions.
1
1
USB Host
port
Provides the interface for
external USB devices.
12
Internal
Door, open
Open this to access the battery.
Bottom View
13
Power
Supply
Input
Connection point for the
controller power source.
Connect the Terminal Block
supplied with the kit to the
power cable.
14
Battery
Holder
The battery is supplied installed;
the user must remove the pull
tab during installation.

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* These are available by separate order.
Installation Space Considerations
Allocate space for:
▪The controller
▪I/O wiring
▪Access to ports and jacks
▪Any modules that will be installed; ensure you allow space to install/uninstall modules
Module dimensions and installation instructions are in the modules’ specifications.
For exact dimensions, please refer to the Mechanical Dimensions shown below.
Mechanical Dimensions
Front View
Bottom View
Mounting
Note
▪Mount on a standard DIN-rail.
▪Ensure that there is sufficient room on the left side of the device to allow for any
COM modules.
1. Push the device onto the DIN-rail
until the clips located at the top
and bottom of the unit have
snapped onto the DIN-rail.
2. When properly mounted, the device
is squarely situated on the DIN-rail
as shown below.

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Battery: Back-up, First Use, Installation, and Replacement
Back-up
In order to preserve back-up values for RTC
and system data in the event of power off,
the battery must be connected.
First Use
The battery is protected by the PLC’s bottom
and inner door.
The battery is supplied installed inside the
unit, with a plastic tab preventing contact.
Pull out this tab before using the device.
Battery Installation and Replacement
▪Use proper precautions to prevent Electro-Static Discharge (ESD) while servicing
the battery.
Caution
▪To preserve back-up values for RTC and system data during battery
replacement, the controller must be powered.
▪Note that disconnecting the battery halts the preservation of back-up values
and causes them to be deleted.
1. Open the bottom and inner doors.
2 If there is a battery present, remove it.
3. Slide the battery into place.

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Wiring
▪This equipment is designed to operate only at SELV/PELV/Class 2/Limited Power
environments.
▪All power supplies in the system must include double insulation. Power supply
outputs must be rated as SELV/PELV/Class 2/Limited Power.
▪Do not connect either the ‘Neutral’ or ‘Line’ signal of the 110/220VAC to device’s
0V point.
▪Do not touch live wires.
▪All wiring activities should be performed while power is OFF.
▪Use over-current protection, such as a fuse or circuit breaker, to avoid excessive
currents into the power supply connection point.
▪Unused points should not be connected (unless otherwise specified). Ignoring this
directive may damage the device.
▪Double-check all wiring before turning on the power supply.
Caution
▪To avoid damaging the wire, use a maximum torque of 0.5 N·m (4.4 in-lb).
▪Do not use tin, solder, or any substance on stripped wire that might cause the
wire strand to break.
▪Install at maximum distance from high-voltage cables and power equipment.
Wiring Procedure
Use crimp terminals for wiring; use 26-12 AWG wire (0.13 mm2–3.31 mm2 )
1. Strip the wire to a length of 7±0.5mm (0.250–0.300 inches).
2. Unscrew the terminal to its widest position before inserting a wire.
3. Insert the wire completely into the terminal to ensure a proper connection.
4. Tighten enough to keep the wire from pulling free.
Wiring Guidelines
In order to ensure that the device will operate properly and to avoid electromagnetic
interference:
▪Use a metal cabinet. Make sure the cabinet and its doors are properly earthed.
▪Use wires that are properly sized for the load.
▪Use shielded twisted pair cables for wiring High Speed and Analog I/O signals.
Use shielded cables for wiring thermocouple and RTD signals.
In either case, do not use the cable shield as a signal common / return path.
▪Route each I/O signal with its own dedicated common wire. Connect common
wires at their respective common (CM) points at the controller.
▪Individually connect each 0V point and each common (CM) point in the system to
the power supply 0V terminal, unless otherwise specified.
▪Individually connect each functional ground point ( ) to the earth of the system
(preferably to the metal cabinet chassis).
Use the shortest and thickest wires possible: less than 1m (3.3’) in length,
minimum thickness 14 AWG (2 mm2).
▪Connect the power supply 0V to the earth of the system.

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▪Earthing the cables' shield:
➢Connect the cable shield to the earth of the system (preferably to the metal cabinet
chassis). Note that the shield must be connected only at one end of the cable; it
is recommended to earth the shield at the PLC-side.
➢Keep shield connections as short as possible.
➢Ensure shield continuity when extending shielded cables.
NOTE
For detailed information, refer to the document System Wiring Guidelines,
located in the Technical Library in the Unitronics’ website.
Wiring the Power Supply
The controller requires an external power supply.
▪In the event of voltage fluctuations or non-conformity to voltage power supply
specifications, connect the device to a regulated power supply.
Connect the +V and 0V terminals as
shown in the accompanying figure.
Connecting Ports
▪Ethernet
CAT-5e shielded cable with RJ45 connector
▪USB Host
Standard USB Type-A plug
USC-B3-R20, USC-B3-T20,
USC-C3-R20, USC-C3-T20
I/O Connection Points
The IOs for these models are arranged in
two groups of fifteen points each, as
shown in the figures to the right.
Top group
Input connection points
Bottom group
Output connection points
The function of certain I/Os may be
adapted via wiring and software settings.
USC-B3-R20, USC-C3-R20
USC-B3-T20, USC-C3-T20

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Wiring the Digital Inputs
All 10 digital inputs share the common point CM0. The digital inputs may be wired together
as sink or source.
Input wiring, sink
Input wiring, source
NOTE
Use sink input wiring to connect a sourcing (pnp) device. Use source input wiring
to connect a sinking (npn) device.
Wiring the Analog Inputs
Both inputs share the common point CM1.
NOTE
▪The inputs are not isolated.
▪Each input offers two modes: voltage or current. You can set each input
independently.
▪The mode is determined by the hardware configuration within the software
application.
▪Note that if, for example, you wire the input to current, you must also set it to
current in the software application.
Voltage
Differential
Single-ended

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Current
2-wire
3-wire
4-wire
Wiring the Relay Outputs (USC-B3-R20, USC-C3-R20)
▪To avoid risk of fire or property damage, always use a limited current source or
connect a current limiting device in series with the relay contacts
The relay outputs are arranged in two
isolated groups:
O0-O3 share the common return CM2.
O4-O7 share the common return CM3.
Increasing Contact Life Span
To increase the life span of the relay contacts
and protect the controller from potential
damage by reverse EMF, connect:
▪a clamping diode in parallel with each
inductive DC load,
▪a RC snubber circuit in parallel with each
inductive AC loadv