Moxa Technologies TCC-100 Installation Manual

Moxa TCC-100 Series
Hardware Installation Guide
Twelfth Edition, January 2015
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© 2015 Moxa Inc. All rights reserved.
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Moxa TCC-100 Series
Hardware Installation Guide
The software described in this manual is furnished under a license
agreement and may be used only in accordance with the terms of that
agreement.
Copyright Notice
© 2015 Moxa Inc. All rights reserved.
Trademarks
The MOXA logo is a registered trademark of Moxa Inc.
All other trademarks or registered marks in this manual belong to their
respective manufacturers.
Disclaimer
Information in this document is subject to change without notice and does not represent a commitment on the part of Moxa.
Moxa provides this document as is, without warranty of any kind, either expressed or implied, including, but not limited to, its particular purpose. Moxa reserves the right to make improvements and/or changes to this manual, or to the products and/or the programs described in this manual, at any time.
Information provided in this manual is intended to be accurate and reliable. However, Moxa assumes no responsibility for its use, or for any infringements on the rights of third parties that may result from its use.
This product might include unintentional technical or typographical errors. Changes are periodically made to the information herein to correct such errors, and these changes are incorporated into new editions of the publication.
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Technical Support Contact Information
www.moxa.com/support
Moxa Americas
Toll
-free: 1-888-669-2872
Tel:
+1-714-528-6777
Fax: +1-714-528-6778
Moxa China (Shanghai office) Tel:
+86-21-5258-9955
Fax:
+86-21-5258-5505
Moxa Europe
Tel:
+49-89-3700399-0
Fax: +49-89-3700399-99
Moxa Asia
-Pacific
Tel:
+886-2-8919-1230
Fax: +886-2-8919-1231
Moxa India
Tel:
+91-80-4172-9088
Fax: +91-80-4132-1045
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Table of Contents
1. Introduction ............................................................. 1
Overview .................................................................... 2
Product Features .......................................................... 4
Package Checklist ........................................................ 4
Product Specifications................................................... 4
Schematic ................................................................... 6
LED Indicators ............................................................. 7
2. Installation ............................................................... 8
Hardware Installation ................................................... 9
Termination Resistor Diagram ..................................... 13
Function Diagram ...................................................... 14
Isolation Block Diagram .............................................. 14
Typical Applications .................................................... 15
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1
1. Introduction
The TCC-100 series consists of RS-232 to RS-422/485 media converters. The “I” versions, the TCC-100I and TCC-100I-T come with 2 kV isolation protection.
The following topics are covered in this chapter:
Overview
Product Features
Package Checklist
Product Specifications
Schematic
LED Indicators
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Overview
Many important devices used in today’s industrial environment are still designed for use with an RS-232 interface. The reason is due in part to tradition, and in part to convenience. RS-232 hardware is relatively easy to design, and the devices can be readily connected to most PCs. The drawback is that RS-232 is a point-to-point interface, and it imposes a distance limitation of only 15 meters between the device and the computer.
To overcome these limitations, many users employ RS-232 to RS-422/485 converters, allowing RS-232 devices to connect to an industrial RS-422 or RS-485 network and transmit data over distances up to 1.2 km. The RS-422/485 standards overcome the distance limitation by using a differential signal for transmitting data and control signals. Transmission distance and multi-drop connections are not the only issues of importance for industrial applications. In addition, housing, wiring, power supply, and over-surge protection are also serious concerns.
The TCC-100I and TCC-100I-T models come with isolation protection for users who need an industrial grade interface conversion product to extend RS-232 transmission distance and increase networking capability. The superior industrial application design, which includes DIN-rail mounting, terminal block wiring, an external terminal block power, and optical isolation for system protection, makes the TCC-100 series suitable for use in critical industrial environments. Your RS-232 devices can be used as part of an industrial RS-422/485 network, but without any hardware or software changes.
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RTS/CTS RS-422 Handshaking Signals
The TCC-100 series supports RS-422 handshaking signals. The RTS and CTS signals help solve the RS-422 signal handshaking problem and reduce data transmission errors.
Built-in RS-485 ADDC™ Intelligence
ADDC™ (Automatic Data Direction Control) is a Moxa technology that uses a clever hardware solution to manage RS-485’s data flow control problem. ADDC™ is a hardware data flow solution that automatically senses and controls data direction, making the handshaking signal method unnecessary.
Isolation
Moxa’s electrical isolation technology uses two photo couplers to create a gap in each electrical signal. One photo coupler transforms the electrical signal into a light signal, which is transmitted across a small gap, and then the other photo coupler transforms the light back into an electrical signal. In this way, the two electrical circuits are completely isolated from each other, limiting the damage that could otherwise be caused by ground loops in the electrical signal.
Reverse Power Protection
The Reverse Power Protection feature provides extra protection against accidentally connecting the power cables to the wrong terminal. The converter is designed to automatically detect which power wire is positive and which is negative, and then adjust the power supply accordingly.
DIP Switch Selectable Terminator
For many products of this type, the termination resistor is set by a jumper located inside the product’s casing, so that the user must open the casing to disable or change the resistor’s strength. Moxa offers a better solution. The TCC-100 series’ terminator is configured with a DIP switch located on the outside of the converter’s casing.
Auto Baudrate Detection
The TCC-100 series incorporates a method for automatically detecting the serial signal’s baudrate by hardware. This is an extremely convenient feature for the user. Even if a device’s baudrate changes, the signal will still be transmitted through the RS-232 to RS-422/485 converter without any problem.
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Product Features
RS-232 to RS-422 conversion with RTC/CTS support
RS-232 to 2/4-wire RS-485 conversion
Detachable wall and DIN-rail mounting for easy RS-422/485 wiring
PWR, Tx, and Rx LEDs
15 kV ESD protection
2 kV isolation (TCC-100I/TCC-100I-T) for both power and RS-422/485
signals
Operating temperature: TCC-100/100I: -20 to 60°C (-4 to 140°F) TCC-100-T/100I-T: -40 to 85°C (-40 to 185°F)
Package Checklist
Before installing the Moxa TCC-100, verify that the package contains the following items:
TCC-100/100I media converter
DK-35A: DIN-rail mounting kit
Power jack to 3-pin terminal block adaptor
User’s manual (this document)
Warranty card
Note: Please notify your sales representative if any of the above items are missing or damaged.
Product Specifications
Communication
RS-232 Signal Supports Tx, Rx, RTS, CTS;
Female DB9 interface
RS-422/485 Signal Terminal block connector (DIP Switch selectable)
4-wire RS-422 (with RTS/CTS), up to 10 nodes (1.2 km) 4-wire RS-485: up to 32 nodes (1.2 km)
2-wire RS-485: up to 32 nodes (1.2 km)
RS-485 Data Direction Control
ADDC™ Baudrate
50 bps to 921.6 Kbps
ESD Protection
15 kV
Isolation
2 kV (TCC-100I/TCC-100I-T) for both power and signal
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Environmental Limits
Operating Temperature
TCC-100/TCC-100I:
-20 to 60°C (-4 to 140 °F) TCC-100-T/TCC-100I-T:
-40 to 85°C (-40 to 185 °F)
Storage Temperature
-40 to 85°C (-40 to 185°F)
Humidity
5 to 95 %RH
Power Requirements
Input Power Voltage
External Power 12-48 VDC, terminal block
Reverse Power Protection
Protects against V+/V- reversal
Over Current Protection
Protects against 2 signals shorted together
Power Consumption TCC-100/TCC-100-T: 85 mA @ 12 V
TCC-100I/TCC-100I-T: 150 mA @ 12 V
Physical Characteristics
Dimensions 67 × 100 × 22 mm (without ears)
90 × 100 × 22 mm (with ears)
Housing
Aluminum
Plug-In Screw
Terminal Block
#22 to #16 AWG
Weight
148±5 g
Regulatory Approvals
CE, FCC (Class A), UL-60950-1
WARNING
1.
This equipment is intended to be used in Restricted Access
Locations such as computer rooms for which access can only be gained by SERVICE PERSONNEL or USERS who have been instructed that the metal chassis of the equipment is extremely hot. Access to the room must be through the use of a key or security identity system.
2.
External metal parts of the equipment are hot!! Be sure to protect your hands before touching the equipment.
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6
WARNING
1. The DC source should come from an external adapto
r or 12
to 48 VDC source (not from DC mains) by using a transfer
device.
2.
This unit should be installed or set up by a qualified service
person.
3. The 12 to 48 VDC power input is used for
product version
2.0 and later. Prior versions use 12 to 30 VDC.
Schematic
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7
LED Indicators
The TCC-100’s top panel contains three LED indicators, as described in the following table:
LED Name
LED Function
PWR
Red indicates the power is on.
Green indicates the TCC-100 is
receiving data from the
RS-232 port.
Yellow indicates the TCC-100 is receiving data from the
RS-422/485 port.
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2
2. Installation
This chapter includes information about how to install TCC-100 products, and shows function and block diagrams.
The following topics are covered in this chapter:
Hardware Installation
Termination Resistor Diagram
Function Diagram
Isolation Block Diagram
Typical Applications
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Hardware Installation
Installing the TCC-100 involves six straightforward steps:
STEP 1: Set the DIP switches
STEP 2: Attach the power supply
STEP 3: Wire the terminal block
STEP 4: Attach the RS-232 converter
STEP 5: Test the connection
STEP 6: Choose a placement option
STEP 1: Set the DIP Switches
The DIP switches on the TCC100/100I are used to set the signal transmission mode and to enable or disable the termination resistor. You can configure the converter for either RS-422 or RS-485 transmission mode. Your program and serial port should be set to match the converter’s settings.
SW1—
Switch 1 selects RS
-422 or RS-485 mode. The default is “Off”
for
RS
-485 mode.
SW2—
Switch 2 selects 2-wire or 4-wire RS-485 mode. The default is “
Off” for 2-wire RS-485. Note that if Switch 1 is set to RS-422
mode, then Switch
2 is inactive.
SW3—
Switch 3 enables the terminator to 120 ohms. When enabled, the 120
ohm resistor prevents signal reflection during RS-485
transmission. The default is
“Off” to dis
able the terminator. If your
particular application does not require usi
ng the termination
resistor, then sim
ply set Switch 3 to the off position to disable it.
Dip Switch Settings
RS-422
(terminator active)
SW1
SW2
SW3
ON
ON
ON
RS-422
SW1
SW2
SW3
ON ON OFF
4-wire RS-485
(terminator active)
SW1
SW2
SW3
OFF ON ON
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10
4-wire RS-485
SW1
SW2
SW3
OFF ON OFF
2-wire RS-485
(terminator active)
SW1
SW2
SW3
OFF OFF ON
2-wire RS-485
SW1
SW2
SW3
OFF OFF OFF
The DIP-2 switches are used to configure the pull high/low resistors for different applications.
Pull High/Low Resistor
DIP-2 SW1
DIP-2 SW2
150k
OFF
OFF
1k (default)
ON
ON
NOTE
We recommend setting the pull high/low resistor to 1k (ON/ON) when termination is enabled.
S2
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11
STEP 2: Attach the power supply
The TCC-100 is powered by an external 12 to 48 VDC power supply. To connect the power supply, run two wires from the V+ and V
- terminals
on
the TCC’s 3-connector terminal
block to the DC power supply, as shown in the figure. Once the power supply is connected to its power source, the PWR LED located on
the
TCC
’s top panel should turn red.
NOTE
The TCC
-100 series supports reverse power protection. That is
, it will automatically detect which power wire is negative, and which is positive.
STEP 3: Wire the terminal block
There are three wiring options available for connecting to the TCC-100’s RS-422/485 terminal block.
2
-wire RS-485
When using the
2-wire RS-
485 wiring
option, connect three wires from
the
TCC
-100’s terminal block to the
opposite connection. As shown in the figure, connect from Data+ to Data+, from Data
- to Data-, and from SGND
to SGND.
4-wire RS-485
When using the 4
-wire RS-
485 wiring
option, connect five wires from
the
TCC
-100’s terminal block to the
opposite connection. As shown in the figure, connect from Tx+(B) to Rx+, from Tx
-(A) to Rx-, from Rx+(B) to
Tx+, from Rx
-(A) to Tx-, and from
SGND to SG
ND.
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12
RS
-422
When using the RS-422 wiring option, first follow the 4
-wire RS-485 wiring
instructions given above.
Optional RTS/CTS Handshaking Signals If your software is set up to send and receive RTS/CTS signals over separate wires, you should also connect from RTS+(B) to CTS+, from RTS
-(A) to
CTS
-, from CTS+(B) to RTS+, and
from CTS-(A) to RTS-.
STEP 4: Attach the RS-232 connector
Depending on your application, use the appropriate serial cable to co
nnect from the TCC-100
product’
s RS-232 female
DB9 port to your RS
-232
device, or to your computer
’s COM port.
Female DB9
PIN
RS-232
1
2
TxD
3
RxD 4 –
5
GND
6
7
CTS
8
RTS 9 –
RS-232 Pin Assignment Diagram
STEP 5: Test the connection
After configuring the DIP switches, connecting the power, wiring the terminal block, and attaching the RS-232 connector, we suggest using a console terminal program, such as HyperTerminal or Moxa Terminal Emulator, to test the connection. If you have an RS-422/485 serial board (such as the Moxa CP-132, a 2-port RS-422/485 board) installed in your PC, you can connect your PC’s COM port to the TCC-100’s RS-232 port, and then connect the TCC-100’s RS-422/485 terminal block to one of the RS-422/485 serial board’s ports. Alternatively, if you have already set up an RS-422 or RS-485 network, you can also connect the TCC-100’s RS-422/485 terminal block directly to that network. Next, start HyperTerminal or Moxa Terminal Emulator, and then open a connection to both the COM port, and the port associated with the TCC-100’s RS-422/485 port. Test the connection by typing a few characters on your PC’s keyboard. The characters you type should show up in the HyperTerminal window that is currently inactive, indicating that the typed characters were transmitted between the TCC-100’s RS-232 port and RS-422/485 terminal block connector.
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13
STEP 6: Placement Options
In addition to placing the TCC-100 on a desktop or other horizontal surface, you may also use the DIN-rail or wall mount options, as illustrated below.
DIN Rail Wall Mounting
Termination Resistor Diagram
Termination is designed to mitigate noise from the RS
-422/485
transmission signal
s. If the network
cable is too
long, undesirable
transmission
-line effects could arise.
The best method for mitigating energy on an unused conductor is to dissipate the energy as heat by terminating both ends of the unused
conductor to ground with resistors (this method is called bi-directional termination).
The resistance of the resistors should be equal to the
characteristic impedance of the line. The most common RS
-485 twisted
pair has a characteri
stic impendence of 100 to 120 ohms. Moxa’s
termination technique is bi
-directional termination, which offers excellent
signal integrity. With this technique, the line drivers can
be located
anywhere on the network.
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14
Function Diagram
Isolation Block Diagram
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15
Typical Applications
RS-485 Application
A typical RS-485 application for the TCC-100 series is shown in the following figure. In this scenario, two TCC-100 units are used to connect two PCs to an RS-485 network. The third TCC-100 is used to connect the PLC, which is designed for the RS-232 interface, to the RS-485 network. In this way, both PCs are able to interact with the PLC and the LCD display.
RS-422 Application
A typical RS-422 application for the TCC-100 Series is shown in the following figure. In this scenario, two TCC-100 units are used to create a point-to-point connection between a PC and a scales. The advantage of using two TCC-100 units to convert from RS-232, to RS-422, and then back to RS-232, is that the RS-422 cable connecting the two converters can be up to 1.2 km in length (this is big improvement compared to the 15-m distance limitation imposed by the RS-232 interface).
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