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Installation and Maintenance
Instructions for Serial
Communication Adapters
Ashcroft Inc. 250 East Main Street, Stratford, CT 06614 USA
Tel: 203-378-8281, Fax: 203-385-0402 www.ashcroft.com
All sales subject to standard terms and conditions of sale.
© 2012 Ashcroft Inc. 2012 I&M - 12/12
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Serial Communication Adapters Instruction Manual
Disclaimer
The information contained in this document is subject to change without
notice. Ashcroft makes no representations or warranties with respect to
the contents hereof, and specifically disclaims any implied warranties of
merchantability or fitness for a particular purpose.
Registered Trademarks
DproM is a registered trademark of Ashcroft Inc. Modbus® is a
registered trademark of Schneider Automation Inc. All other trademarks
mentioned in this document are the property of their respective owners.
© 2012 Ashcroft Inc. All rights reserved.
ORDERING INFORMATION
Model Description
101B224-05 DM61 Meter Copy Cable, 3' (0.9 m)
101B224-06 DM61 RS-232 Serial Adapter
101B224-07 DM61 RS-485 Serial Adapter
101B224-08 DM61 USB Serial Adapter
101B224-09 USB to RS-232 Non-Isolated Converter
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Serial Communication Adapters Instruction Manual
SAFETY INFORMATION
!
CAUTION: Read complete
instructions prior to installation and operation of the
equipment.
WARNING
WARNING: Risk of
electric shock.
Hazardous voltages could exist on serial communication wiring
networks. Installation and service should be performed only by
trained service personnel.
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Serial Communication Adapters Instruction Manual
Table of Contents
ORDERING INFORMATION --------------------------------------------- 2
SAFETY INFORMATION ------------------------------------------------- 3
SPECIFICATIONS ---------------------------------------------------------- 5
101B224-06 DM61 RS-232 Serial Adapter -------------------------------- 5
101B224-07 DM61 RS-485 Serial Adapter -------------------------------- 5
101B224-08 DM61 USB Serial Adapter ------------------------------------ 5
101B224-09 USB to RS-232 Converter ------------------------------------- 6
SERIAL COMMUNICATIONS OVERVIEW -------------------------- 7
101B224-06 DM61 RS-232 SERIAL ADAPTER -------------------- 9
Description ------------------------------------------------------------------------- 9
Installation ------------------------------------------------------------------------ 10
Connections -------------------------------------------------------------------- 11
DM61 Serial Communication Address (serial) ---------------------- 11
101B224-07 DM61 RS-485 SERIAL ADAPTER ------------------- 12
Description ----------------------------------------------------------------------- 12
Installation ------------------------------------------------------------------------ 13
DM61 Serial Communication Address (serIAl) ---------------------- 13
Connections -------------------------------------------------------------------- 16
101B224-08 DM61 TO USB SERIAL ADAPTER ------------------ 17
Description ----------------------------------------------------------------------- 17
Installation ------------------------------------------------------------------------ 17
101B224-09 USB TO RS-232 CONVERTER ----------------------- 18
Description ----------------------------------------------------------------------- 18
Installation ------------------------------------------------------------------------ 18
TROUBLESHOOTING ---------------------------------------------------- 19
Table of Figures
Figure 1. RS-232 Adapter Connections ............................................ 10
Figure 2. RS-422 or RS-485 Wiring ................................................... 14
Figure 3. RS-485 Two-Wire Multi-Drop Wiring ................................. 15
Figure 4. Connections for 101B224-07 to Serial Converter ............ 16
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Serial Communication Adapters Instruction Manual
SPECIFICATIONS
101B224-06 DM61 RS-232 Serial Adapter
COMPATIBILITY EIA-232
CONNECTORS PC compatible 9-pin D subminiature connector (DB9) and
CABLE 6' (1.8 m) standard Cat5e cable provided with adapter
DISTANCE Adapter to DM61 meter: 6' (1.8 m) max; Adapter to com-
POWER Powered by DM61 meter M-Link connection
STATUS
INDICATION
101B224-07 DM61 RS-485 Serial Adapter
COMPATIBILITY EIA-485
CONNECTORS Removable screw terminal connector and RJ11 (adapter to
CABLE 6' (1.8 m) standard Cat5e cable provided with adapter
DISTANCE Adapter to DM61 meter: 6' (1.8 m) max; Adapter to com-
POWER Powered by DM61 meter M-Link connection
STATUS
INDICATION
101B224-08 DM61 USB Serial Adapter
COMPATIBILITY USB 1.1, USB 2.0
CONNECTORS RJ45, and USB Type B
CABLE One 6' (1.8 m) standard Cat5e cable and one 3.28’ (1.0 m)
DISTANCE Adapter to DM61 meter: 6' (1.8 m) max. USB connection:
DRIVER Windows 98/SE, ME, 2000, Server 2003/2008, XP 32/64-
POWER USB Port
STATUS
INDICATION
RJ45 (adapter to meter)
puter: 50' (15 m) max; serial interface cable not provided
Separate LEDs for Power (P), Transmit (TX), and
Receive (RX)
meter)
puter: 3,937' (1,200 m) max
Separate LEDs for Power (P), Transmit (TX), and
Receive (RX)
USB A-B Male cable provided with adapter
10' (3 m) max
Bit, Vista 32/64-Bit, Windows 7 32/64-Bit
Separate LEDs for Power (P), Transmit (TX), and Receive
(RX)
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Serial Communication Adapters Instruction Manual
101B224-09 USB to RS-232 Converter
COMPATIBILITY USB 1.1, USB 2.0, EIA-232
CONNECTORS PC compatible 9-pin D subminiature connector (DB9) and
DRIVERS Windows® 98/2000/ME/XP
DISTANCE USB connection: 10' (3 m) max; RS-232 connection: 50'
POWER USB port
USB Type A
(15m) max
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Serial Communication Adapters Instruction Manual
SERIAL COMMUNICATIONS OVERVIEW
RS-232, RS-422, and RS-485 are standard interfaces approved by the
Electronic Industries Alliance (EIA) for connecting serial devices. In EIA
terms, the device (e.g. meter) that connects to the interface is called a
Data Communications Equipment (DCE) and the device to which it connects (e.g. the computer) is called a Data Terminal Equipment (DTE).
The RS-422 standard was designed to replace the older RS-232 standard because it supports higher data rates and greater immunity to electrical interference. RS-485 is similar to RS-422 but can support multipoint connections per line because it uses lower-impedance drivers and
receivers.
Line drivers and receivers are used to exchange data between two or
more points (nodes) on a serial communications network. Reliable data
communications can be difficult in the presence of induced noise,
ground level differences, and other hazards associated with installation
of a network. When communicating at high data rates, or over long distances in real world environments, RS-232 is often inadequate. The
differential data transmission of RS-422 and RS-485 offers superior
performance in most applications. Differential signals can help nullify the
effects of ground shifts and induced noise signals that can appear as
common mode voltages on a network.
RS-422 was designed for greater distances and higher baud rates than
RS-232. In its simplest form, a pair of converters from RS-232 to
RS-422 (and back again) can be used to form an "RS-232 extension
cord". Data rates of up to 100 kbits/second and distances of 3,937'
(1,200 m) can be accommodated with RS-422.
RS-422 devices however cannot be used to construct a true multi-point
network. A multi-point network consists of multiple drivers and receivers
connected on a single bus, where any point (node) can transmit and/or
receive data. RS-485 is an enhanced version of the RS-422 standard,
which allows multiple drivers and receivers on the same two-wire or
four-wire system. The RS-485 standard specifies up to 32 drivers and
32 receivers on a single bus, but with the introduction of "automatic"
repeaters and high-impedance drivers/receivers, this number can be
extended to hundreds of points (nodes) on a network.
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Serial Communication Adapters Instruction Manual
The cabling used for an RS-422 or RS-485 serial communications
network should always be a high quality cable such as Belden 8162 or
Alpha 6203C. A two-wire system requires two twisted pairs, and a fourwire system requires three twisted pairs (the extra twisted pair is
needed for the signal ground).
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Serial Communication Adapters Instruction Manual
101B224-06 DM61 RS-232 SERIAL ADAPTER
Description
The 101B224-06 converts the serial output of the DM61 meter to an
unbalanced, full-duplex RS-232 signal.
The RS-232 port has a female DB9 connector with pins 2 (RX output),
3 (TX input), and 5 (Signal Ground). Pins 7 (RTS) and 8 (CTS) are tied
together, and pins 1 (CD), 4 (DTR), and 6 (DSR) are tied together. The
adapter is powered by the DM61 meter M-Link connection.
Baud rates are adjustable and handled by the DM61 (see the DM61
Instruction Manual for more details).
The 101B224-06 has three diagnostic LEDs: a Power (P) LED to show
when the adapter is powered properly, a Transmit Data (TX) LED to
show when the adapter is sending data out from the PC side, and a
Receive Data (RX) LED to show when the adapter is receiving data
from the DM61 meter.
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Serial Communication Adapters Instruction Manual
Installation
Figure 1 shows the connection of a DM61 meter to a PC using the
101B224-06 serial adapter. The 101B224-06 has an RJ45 connector to
connect the Cat5e cable and a PC compatible 9-pin D subminiature
connector (DB9). The DB9 can be connected directly to the PC or by
using a standard serial extension cable.
RS-232 Adapter
Serial
Cable
(Not Provided)
Figure 1. RS-232 Adapter Connections
10
Cat5e Cable
(Provided)
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Serial Communication Adapters Instruction Manual
Connections
A Cat5e cable is provided to connect the DM61 meter to the 101B224-06
serial adapter.
DM61 Serial Communication Address (serial)
The DM61 meter is factory set to address 001.
To change the DM61 meter address:
1. Press and hold the Menu button for three seconds to access Advanced Features menu of the meter.
2. Press Up arrow until Serial (SEriaL) menu is displayed and press
Enter, Addres is displayed.
3. Press Enter to change meter address using Right and Up arrow
buttons. Press Enter to accept.
4. Press Menu button to exit and return to Run Mode.
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Serial Communication Adapters Instruction Manual
101B224-07 DM61 RS-485 SERIAL ADAPTER
Description
The 101B224-07 converts the serial output of the DM61 meter to
balanced, full or half-duplex RS-485 signals.
The 101B224-07 has a removable screw terminal connector for the
RS-485 terminals which includes Transmit Data (DO) and (/DO),
Receive Data (DI) and (/DI), and Signal Ground. The adapter is
provided by the DM61 meter M-Link connection.
Baud rates are adjustable and handled by the DM61 (see the DM61
Instruction Manual for more details).
The 101B224-07 has three diagnostic LEDs: a Power (P) LED to show
when the adapter is powered properly, a Transmit Data (TX) LED to
show when the adapter is sending data out from the RS-485 bus to the
meter, and a Receive Data (RX) LED to show when the adapter is
receiving data from the DM61 meter.
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Installation
Figure 2 shows the connection of a DM61 meter to a single-point fullduplex RS-485 device using the 101B224-07 serial adapter. The
101B224-07 has an RJ45 connector to connect the Cat5e cable and a
screw terminal connector to connect to the RS-485 network. Figure 3
shows the connection of several DM61 meters with 101B224-07 serial
adapters to a multi-point half-duplex RS-485 network.
DM61 Serial Communication Address (serIAl)
When using more than one meter in a multi-drop or multi-point mode,
each meter must be provided with its own unique address. For the
DM61 meter the address may be programmed from 001 to 247. The
DM61 meter is factory set to address 001.
To change the DM61 meter address:
1. Press and hold the Menu button for three seconds to access Advanced Features menu of the meter.
2. Press Up arrow until Serial (SEriaL) menu is displayed and press
Enter, Addres is displayed.
3. Press Enter to change meter address using Right and Up arrow
buttons. Press Enter to accept.
4. Press Menu button to exit and return to Run Mode.
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Figure 2. RS-485 Full-Duplex Four-Wire Wiring
Notes:
1. Termination resistors are optional and values depend on the cable
length and characteristic impedance. Consult the cable manufacturer
for recommendations.
2. Use shielded cable, twisted-pairs plus ground. Connect ground shield
only at one location.
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Figure 3. RS-485 Half-Duplex (Multi-Drop) Two-Wire Wiring
Notes:
1. Termination resistors are optional and values depend on the cable
length and characteristic impedance. Consult the cable manufacturer
for recommendations.
2. Use shielded cable, twisted-pair plus ground. Connect ground shield
only at one location.
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Connections
A Cat5e cable is provided to connect the DM61 meter to the 101B224-07
adapter.
Figure 4 details the wiring connections from the 101B224-07 to a fullduplex RS-485 four-wire network device.
101B224-07 to RS-422/485 Serial
Converter Connections
RS-485 FullDuplex Device
DO DI
DO DI
DI DO
DI DO
101B224-07
RS-485 Adapter
Figure 4. Connections for 101B224-07 to RS-485 Device
If the RS-485 device configured for a two-wire network then the requirement to externally wire the DO to the DI and the /DO to the /DI on
the 101B224-07 screw terminal connector is needed.
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Serial Communication Adapters Instruction Manual
101B224-08 DM61 TO USB SERIAL ADAPTER
Description
The 101B224-08 DM61 to USB Serial Adapter allows for direct connection of a DM61 Series meter to the USB port of a PC.
Installation
Figure 22 shows the connection of a DM61 Series meter to a PC using
a 101B224-08 DM61 to USB Serial Adapter.
Figure 22. USB Adapter Connections
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Serial Communication Adapters Instruction Manual
101B224-09 USB TO RS-232 CONVERTER
Description
The 101B224-09 USB to RS-232 Converter allows for direct connection
of a serial device to the USB port of a PC.
Installation
Figure 23. shows the connection of a Trident meter to a PC using a
101B224-09 USB to RS-232 Converter, PDA7232 RS-232 adapter, and
the PDA7420 Modular Cable.
RS-232 Adapter
RS-232
Converter
Cat5e Cable
(Provided)
Figure 23. Connections for 101B224-09 to serial device
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TROUBLESHOOTING
Symptom Check/Action
Power LED is off 101B224-06 or 101B224-07:
Meter not communicating with
DproM or other programs
If both data status LEDs (TX and
RX) are off when trying to communicate
Communications slow Increase the baud rate
Random communication errors 1. Increase the TX delay time
Other symptoms not described
above
1. Check modular cable connection
2. Check power to meter
101B224-08:
1. Check USB connections
2. Try different USB port
3. Check USB port with other device
Check:
1. Serial adapter and cable
2. Serial protocol selected
3. Meter address and baud rate
4. Software address and baud rate
Remove all unnecessary cables and
meters. Try getting the system to work
with only one meter (to ease troubleshooting) and then expand the system
one device at a time.
101B224-06:
1. Check serial cable
2. Connect the DB9 directly to the PC
3. Try a different serial port
2. Decrease the baud rate
Call Technical Support for
assistance.
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Ashcroft Inc. 250 East Main Street, Stratford, CT 06614 USA
Tel: 203-378-8281, Fax: 203-385-0402 www.ashcroft.com
All sales subject to standard terms and conditions of sale.
© 2012 Ashcroft Inc. 2012 I&M - 12/12
LIM7232DI_A
12/12
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