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IOLAN DG1 and TG2 Device Servers (Serial to Ethernet Device Servers)

iolan s ds db9m lg
  • 1 or 2 serial Ports
  • Software selectable RS232/422/485 or fixed RS232 serial port interface
  • 10/100 or 10/100/1000 Ethernet
  • Extended temperature model available

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The IOLAN DG/TG Device Server is the best choice for simple serial
to Ethernet
connectivity applications. Delivering a cost effective solution
in a compact size, the IOLAN DG/TG offers flexibility and advanced TrueSerial® technology
making it ideal for applications that require an authentic serial connection across an Ethernet network. IOLAN DG1 Device Servers are also available with support for Extended Temperature Ranges.

Features and Benefits

  • TrueSerial® delivers the most authentic serial connections across Ethernet
  • Powerful processors for the best throughput and performance on the market
  • Indicators for network
    and serial interfaces for easy troubleshooting
  • Plug & Play
    installation utility eliminates configuration hassles for
    all IOLANs on you IP network
  • TruePort software provides
    true remote serial ports over an Ethernet LAN
  • Share a serial port with multiple TCP or UDP servers
  • Software Development
    available to develop powerful custom applications
  • Power over
    serial cable models eliminate costs of a separate power
  • Next Generation IP support (IPv6) for investment protection and network compatibility
  • Compact and protective solid steel enclosure for tabletop, wall mount or DIN rail mounting
Diagram DS1

Flexible and Reliable Serial to Ethernet Connections

The IOLAN DG/TG is ideal for connecting serial-based COM port, UDP or TCP socket
based applications to remote devices. Perle’s TruePort re-director provides fixed TTY
or COM ports to server based applications enabling communication
with remote devices connected to Perle device servers. You can also tunnel serial data between
devices across an IP network.

Easy to set up and manage, the IOLAN has a software selectable RS-232/422/485 interface capability which simplifies
setup and eliminates mechanical tampering associated with DIP switch based products.

Perle’s Device Management software, shipped as standard with the IOLAN DG/TG, provides better centralised control and management of multiple units resulting in maximum uptime for your remote equipment. Protection against electrostatic discharges and power surges is provided
on the IOLAN DG/TG with its robust 15Kv ESD protection circuitry enabling organizations to utilize this solution with confidence.

IOLAN Plug-ins

Backed with the experience of connecting
hundreds of thousands of different devices to Ethernet
over the years, using a Perle Device Server you can rest
assured that virtually any device with a serial COM port
will operate in conjunction with your desired application
exactly as it did when you had it directly connected.  If
the unlikely event occurs that the Perle Device Server
does not enable this out of the box, Perle will make
it work

IOLAN Device Servers utilize customer installable “Device
Plug-ins” to successfully network devices where other
solutions have failed. Request a free engineering consultation now.

Advanced IP Technology

With support for Next Generation IP (IPv6) the IOLAN range
provides organizations with investment protection to meet
this rapidly growing standard.

Demand for IPv6, which is
compatible with IPv4 addressing schemes, is driven by the
need for more IP address. With the implementation and rollout
of advanced cellular networks, a robust method is needed to handle
the huge influx of new IP addressable devices on the Internet.
In fact, the US Department of Defense has mandated that all equipment purchased be IPv6 compatible. In addition, all major Operating Systems such as Windows, Linux, Unix and Solaris, as well
as routers, have built-in support for IPv6.

It is therefore important for end users and
integrators to select networking equipment that incorporates
the IPv6 standard. The IOLAN line with support for IPv6 already
built in, is the best choice in serial to Ethernet technology.

Lifetime Warranty

The Perle IOLAN DG/TG Device Server is backed by the best service and support in the industry including Perle’s unique lifetime warranty. Since 1976 Perle has been providing its customers with networking products that have the highest levels of performance,
flexibility and quality.


Serial Port Access
Connect directly using Telnet and Reverse Telnet
Multihost access enables multiple
hosts/servers to share serial ports
  In-band ( ethernet ) and out-of-band ( dial-up modem ) support
IPV6 and IPV4 addressing support
Primary/Backup host functionality enables automatic connections to
alternate host(s)
Local database USERID/PASSWORD
Disable unused daemons
Terminal Server
Auto session login
MOTD – Message of the day
Serial machine to Ethernet
Tunnel raw serial data across Ethernet
Raw serial data over TCP/IP
Raw serial data over UDP
Serial data control of packetized data
serial ports with multiple hosts/servers
Virtual modem simulates a modem connection – assign IP address by AT
phone number
TruePort com/tty redirector for serial based applications on Windows, Linux, Solaris, SCO, HP UX, NCR UNIX and AIX. For a complete list of all the latest drivers click here
TrueSerial packet technology
provides the most authentic serial connections across Ethernet ensuring
serial protocol integrity”
RFC 2217 standard for transport of serial data and RS232 control signals
Customizable or fixed serial baud rates
Plug-ins allow customer or Perle provided plug-ins for special applications
Software Development Kit
( SDK ) available
Serial encapsulation of industrial protocols such as ModBus, DNP3 and IEC-870-5-101
TCP gateway enables serial Modbus ASCII/RTU device connection to ModBus
Data logging will store serial
data received when no active TCP session and forward to network peer
once session re-established – 4K bytes circular per port
Console Management
Sun / Oracle Solaris Break Safe
Reverse Telnet
OA&M ( Operations, Administration and Management )
SNMP V3* – read and write, Perle MIB
Perle Device Manager – Windows based utility for large scale deployments
Configurable default configuration
Installation Wizard
Set a Personalized Factory Default for your IOLANs
TFTP, Telnet, raw, reverse Telnet, WINS, HTTP, SNMPV3*, RFC2217

* No SNMPV3 encryption. For full SNMPV3 support see IOLAN SDS Device Servers.

Hardware Specs

Hardware Specifications

Processor 600Mhz ARM Processor MPC852T, 66 Mhz, 87 MIPS
RAM MB 512 16
Flash MB 4000 4
Interface Ports
Number of Serial Ports 1 2 1 2
Serial Port Interface Software selectable RS-232/422/485 on DB25F, DB9M or RJ45 RS-232 on RJ45 – 10 pin Software selectable RS-232/422/485 on DB25M, DB25F, DB9M or RJ45 RS-232 on RJ45 – 10 pin
Sun / Solaris Sun / Oracle ‘Solaris’ Safe – no “break signal” sent during power cycle causing costly server re-boots or downtime
Serial Port Speeds 300bps to 230Kbps with customizable baud rate support 50bps to 230Kbps with customizable baud rate support
Data Bits 5,6,7,8, 9-bit protocol support
Parity Odd, even, Mark, Space, None
Flow Control Hardware, Software, Both, None
Serial Port Protection 15Kv Electrostatic Discharge Protection ( ESD )
Local Console Port RS232 on Serial Port
Network Autosensing 1000Base-T / 100Base-TX / 10Base-T Auto-MDIX 10Base-T / 100Base-TX ethernet RJ45
Software selectable Ethernet speed 10/100/1000 Software selectable Ethernet speed 10/100 Auto
Software selectable Half/Full/Auto duplex
Ethernet Isolation 1.5Kv Magnetic Isolation
Power Supply 120 V AC (USA), 230V AC (International) Wall Power Adaptor included
Power Supply Options Power via External power 9-30v DC, 4.8 Watts uses standard 5.5mm x 9.5mm x 2.1mm barrel socket, Power IN over serial cable.
Nominal Input Voltage 12v DC / 24v DC
Input Voltage Range 9-30v DC
Power IOLAN over Serial 9 – 30v DC with DB25 and RJ45 models 9 – 30v DC with DB25 and RJ45 models N/A
Typical Power Consumption ‘@ 12v DC ( Watts ) 1.9 2 1.7 1.7
LEDs Power / Ready
Network Link
Network Link activity
Serial: Transmit and Receive data per port
Environmental Specifications
Heat Output
( BTU/HR )
6.8 8.9 5.8 5.8
MTBF ( Hours ) 267,483 254,834 124,004 299,680

Calculation model based on MIL-HDBK-217-FN2 @ 30 °C

Operating Temperature 0ºC to 55ºC ( 32ºF to 131ºF )
Storage Temperature -40ºC to 66ºC, (-40ºF to 150ºF )
Humidity 5 to 95% (non condensing) for both storage and operation.
Case SECC Zinc plated sheet metal (1 mm)
Ingress Protection Rating IP40
Mounting Wall or Panel mounting . DIN Rail mounting kit optional
Product Weight and Dimensions
Weight .23 KG (.51 lbs)
Dimensions 90 x 64 x 22 (mm), 3.6 x 2.5 x 0.87 (in) case dimensions not including mounting tabs,
  90 x 89 x 24 (mm), 3.6 x 3.5 x 0.87 (in) includes mounting tabs.
Shipping Dimensions 260 x 170 x 70 (mm), 10.2 x 6.7 x 2.8 (in)
Shipping Weight 0.49 KG (1.1 lbs)
Regulatory Approvals
Emissions CFR47 FCC Part 15 Subpart B:2015 CFR47:2003, Chapter 1, Part 15 Subpart B,(USA) Class A
ICES-003:2016 Issue 6:2016 ICES-003, Issue 4, February 2004 (Canada)
CISPR 32:2015/EN 55032:2015 (Class A)
EN55011 (CISPR11)
CISPR 16-2-3:2010/A2:2014
EN61000-3-2:2014, Limited for Harmonic Current Emissions EN61000-3-2 : 2010, Limits for Harmonic Current Emissions
EN61000-3-3:2013, Limits of Voltage Fluctuations and Flicker EN61000-3-3 : 2010, Limits of Voltage Fluctuations and Flicker
Immunity CISPR 24:2010/EN 55024:2010
EN61000-4-2: 2009 Electrostatic Discharge
EN61000-4-3: 2006/A2:2010: RF Electromagnetic Field Modulated
EN61000-4-4: 2004 Fast Transients
EN61000-4-5: 2006 Surge
EN61000-4-6: 2009 RF Continuous Conducted
EN61000-4-8: Power-Frequency Magnetic Field
EN61000-4-11: Voltage Dips and Voltage Interruptions
Safety IEC 62368-1 and EN 62368-1:2014 IEC 60950-1 (ed 2); am1 am2 and EN 60950-1:2006 +A11:2009 +A1:2010 +A12:2011 +A2:2013
CAN/CSA-C22.2 No. 62368-1-14 and UL 62368-1 CAN/CSA-C22.2 No. 60950-1-03 and ANSI/UL 60950-1, Second Edition
Other Reach, RoHS and WEEE Compliant
Directive 2011/65/EU restriction of the use of certain hazardous substances in electrical and electronic equipment and meets the following standard:: EN 50581:2012
ECCN – 5A991
HTSUS Number: 8471.80.1000
Perle Lifetime warranty

Serial Connector Pinout
IOLAN DB9M Socket Direction RS232 RS485 Full Duplex RS485 Half Duplex RS422
1 in DCD
2 in RxD RxD+ RxD+
3 out TxD TxD+ DATA+ TxD+
4 out DTR
6 in DSR RxD- RxD-
7 line RTS
8 in CTS
9 line TxD- DATA- TxD-
IOLAN RJ45 Socket Direction RS232 RS485 Full Duplex RS485 Half Duplex RS422
1 line Power In Power In Power In Power In
2 in DCD
3 out RTS TxD+ DATA+ TxD+
4 in DSR
5 out TxD TxD- DATA- TxD-
6 in RxD RxD+ RxD+
8 in CTS RxD- RxD-
9 out DTR
10 line
IOLAN DB25M Socket Direction RS232 RS485 Full Duplex RS485 Half Duplex RS422
1 line Shield Shield Shield Shield
2 out TxD
3 in RxD
4 out RTS
5 in CTS
6 in DSR
8 in DCD
9 line
12 line Power In Power In Power In Power In
13 line CTS-
14 line TxD+ DATA+ TxD+
15 line TxD- DATA- TxD-
18 line RTS+
19 line RTS-
20 out DTR
21 line RxD+ RxD+
22 line RxD- RxD-
25 line CTS+
IOLAN DB25F Socket Direction RS232 RS485 Full Duplex RS485 Half Duplex RS422
1 line Shield Shield Shield Shield
2 in RxD
3 out TxD
4 in CTS
5 out RTS
6 out DTR
8 in DCD
9 line
12 line Power In Power In Power In Power In
13 line RTS-
14 line RxD+ RxD+
15 line RxD- RxD-
18 line CTS+
19 line CTS-
20 in DSR
21 line TxD+ DATA+ TxD+
22 line TxD- DATA- TxD-
25 line RTS+

Optional Perle adapters for use with straight thru CAT5 cabling

Application Diagrams


Using RAW TCP Sockets

A raw TCP socket connection which can be initiated from the serial-Ethernet device or from the remote host/server. This can either be on a point to point or shared basis where a serial device can be shared amongst multiple devices. TCP sessions can be initiated either from the TCP server application or from the Perle IOLAN serial-Ethernet adapter.

diagram tcp

Using Raw UDP Sockets

For use with UDP based applications, Perle IOLANs can convert serial equipment data for across UDP packets either on a point to point basis or shared across multiple devices.

diagram udp
Console Server

Console Management

For access to remote console ports on routers, switches, etc, Perle IOLAN’s enable administrators secure access to these RS232 ports via inband Reverse Telnet or out of band with dial-up modems. Perle IOLAN models with integrated modems are available.

diagram console

Connect Serial-based Applications with a COM/TTY Port Driver

Serial ports can be connected to network servers or workstations running Perle’s TruePort software operating as a virtual COM port. Sessions can be initiated either from the Perle IOLAN or from TruePort.

diagram com tty

Serial Tunneling between two Serial Devices

Serial Tunneling enables you to establish a link across Ethernet to a serial port on another IOLAN. Both IOLAN serial ports must be configured for Serial Tunneling (typically one serial port is configured as a Tunnel Server and the other serial port as a Tunnel Client).

diagram tunneling
Virtual Modem

Virtual Modem

Enables the serial-Ethernet adapter to simulate a modem connection. When connected to the IOLAN and initiates a modem connection, the IOLAN starts up a TCP connection to another IOLAN serial-Ethernet adapter configured with a Virtual Modem serial port or to a host running a TCP application.

diagram modem

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