
C-71
DIN-100 OMEGABUS®Series
DIN RAIL MOUNT DIGITAL TRANSMITTERS
$
140
Basic Unit
 Complete Sensor to
RS-485 Interface
 500V RMS Analog
Input Isolation
 15-Bit Measurement 
Resolution
 Continuous Self-
Calibration; No 
Adjustments of any Kind
 Programmable Digital 
Filter
 Requires +5VDC Supply 
 Transient Suppression
on RS-485 
Communications Lines
 Screw Terminal Plug 
Connectors Supplied
APPLICATIONS 
 Process Monitoring
and Control
 Remote Data Logging
to any Host Computer
 Product Testing 
 Interface to PLC
The selections are stored in 
nonvolatile EEPROM which 
maintains data even after power 
is removed.
The key to the DIN-100 Series is 
that the modules are easy to use. 
You do not need engineering 
experience in complicated data 
acquisition hardware. With these 
modules, anyone familiar with a 
personal computer can construct a 
data acquisition system. This 
modular approach to data 
acquisition is extremely flexible, 
easy to use and cost effective. Data 
is acquired on a per channel basis 
so you only buy as many channels 
as you need. The modules can be 
mixed and matched to fit your 
application. They can be placed 
remote from the host and from each 
other. You can string up to 247 
modules on a twisted pair of wires 
by using RS-485 with repeaters.
All modules are supplied with screw 
terminal plug connectors. The 
connectors allow system expansion, 
reconfiguration or repair without 
disturbing field wiring. No charge 
utility software is available to make 
the DIN-100 modules easier to learn 
and use.
THEORY OF OPERATION
Each module is a complete singlechannel data acquisition system. 
Each unit contains analog signal 
conditioning circuits optimized for a 
specific input type. Sensor signals 
are converted to digital data with a 
microprocessor-controlled 
integrating A/D converter. Offset 
and gain errors in the analog 
circuitry are continuously monitored 
and corrected using microprocessor 
techniques. The DIN-100 module 
converts the digital signal data and 
stores the resultant data in a 
memory buffer. The modules 
continuously convert data at the rate 
of 8 conversions per second and 
store the latest result in the buffer.
Host processors may request data 
by sending a query to the module. 
The DIN-100 module will instantly 
respond by communicating the 
memory buffer data back to the host 
processor. Up to 247 modules may 
be linked to a single RS-485 port. 
Each module on a serial line is 
identified by a unique userprogrammable address. This 
addressing technique allows 
modules to be interrogated in any 
order.
The DIN-100 Sensor to Computer 
Modules are a family of data 
acquisition modules that convert 
analog input signals to serial data 
and transmit via RS-485 to a master 
unit which may be a computer or 
other processor-based equipment. 
The modules can measure 
temperature, bridge inputs, voltage, 
current, digital input or digital output 
signals. The modules provide direct 
connection to a wide variety of 
sensors and perform all signal 
conditioning, scaling, linearization 
and conversion to either linearized 
ASCII data values or Modbus RTU 
data values. Features such as 
address, baud rate, parity, echo, 
etc., are selectable using simple 
commands from your serial port. 

C-72
C
DIGITAL INPUTS/OUTPUTS
DIN-170 digital output modules 
contain open-collector transistor 
switches that may be controlled by 
the host processors. These 
switches may be used to control 
solid-state relays which in turn may 
control heaters, pumps and other 
power equipment. The digital inputs 
may be read by the host processor 
and used to sense the state of 
remote digital signals. They are 
ideal for sensing the state of limit or 
safety switches.
DIGITAL FILTER
The DIN-100 analog input modules 
include two unique programmable 
single pole digital filters. The filter is 
used to smooth analog data in noisy 
environments. Separate time 
constants may be specified for small 
and large signal changes. Typically 
a large time constant is specified for 
small signal changes to filter out 
noise and provide stable output 
readings. A smaller time constant 
may be chosen for large signal 
changes to provide fast response to 
such changes.
COMMAND SET
The DIN-100 Series uses the 
Modbus RTU or ASCII protocol for 
communication. The Modbus RTU 
binary protocol uses a master-slave 
technique, in which only the master 
device can initiate transactions. The 
slave devices respond by supplying 
the requested data to the master or 
by taking the action requested in the 
query. The master can address any 
slave device. The returned 
messages are considered response 
messages. The supported master 
codes are below in the chart.
Modbus RTU Functions 
and Descriptions
01 Read Coil Status
(Digital Inputs)
04 Read Input Register 
(Analog Inputs)
05 Force Single Coil 
(One Digital Output)
06 Preset Single Register 
(RTU Protocol)
15 Force Multiple Coils 
(Multiple Digital Output)
The ASCII protocol is a command and response protocol using ASCII 
characters for easy troubleshooting and interpretation of data values.
SETUP
DIN-100 modules are initiated at the 
factory using the ASCII protocol. 
This allows setup and configuration, 
including the Modbus device 
address, to be easily performed 
using the utility setup software or a 
dumb terminal. Each DIN-100 
module must be properly configured 
before installation into a Modbus 
system.
UTILITY SOFTWARE
Complimentary Utility Software is 
included with each purchase order. 
The software is compatible with 
Windows 95, 98, NT 4.0+, 2000
operating systems and distributed 
on CD-ROM. The Utility Software 
simplifies configuration of all userselectable options such as device 
address, baud rate and filtering 
constants. The latest version of the 
software is always downloadable 
from our web site.
PROCESS CONTROL SOFTWARE
Modbus RTU protocol is supported 
by virtually all commercial process 
control software programs available 
today. These programs operate on 
IBM and compatible personal 
computers in the Windows 95, 98, 
NT and IBM OS/2 environments.
DIN-100 Series ASCII Command Set
Command and Definition Typical Command Typical Response
Message ($ prompt) Message
DI Digital Input  $1D1 *0003 
DO Digital Output $1DOFF * 
RD Read Data $1RD *+00072.00 
RS Read Setup $1RS *31070142 
RZ Read Zero $1RZ *+00000.00 
WE Write Enable $1WE *
Write Protected Commands
CZ Clear Zero $1CZ * 
RR Remote Reset $1RR * 
SU Setup Module $1SU31070142 * 
TS Trim Span $ITS+00600.00 * 
TZ Trim Zero $1TZ+00000.00 *

C-73
ENVIRONMENTAL 
Operating Temperature Range:
-25 to 70°C (-13 to 158°F)
Storage Temperature Range:
-25 to 85°C (-13 to 185°F) 
Relative Humidity: 0 to 95% 
noncondensing
MECHANICALS AND 
DIMENSIONS
Case: ABS case with captive
hardware 
Connector: screw terminal barrier 
plug (supplied)
SPECIFICATIONS FOR 
SPECIFIC MODULES 
DIN-100 VOLTAGE INPUTS 
Voltage Ranges: +
10mV, 
+100mV, +1V, +5V, +10V, 
+100Vdc
Resolution: 0.01% of FS (4 digits) 
Accuracy: +0.02% of FS max 
Common Mode Rejection: 100dB
at 50/60Hz 
Zero Drift: +1 count max 
(autozero)
Span Tempco: +50ppm/°C max 
Input Burnout Protection:
to 250Vac normal mode
Input Impedance:
< +1V input = 100MΩ min; 
> +5V input = 1MΩ min
DIN-120 CURRENT INPUTS 
Currents: 4-20 mAdc 
Resolution: 0.04% of FS 
Accuracy: 0.04% of FS
Common Mode Rejection:
100dB at 50/60Hz 
Zero Drift: +
1 count max
(autozero)
Span Tempco:
+50ppm/°C max
Voltage Drop: +0.1V max
DIN-130 THERMOCOUPLE 
INPUTS 
Thermocouple Input:
automatic cold junction 
compensation and linearization, 
open thermocouple indication, 
overrange indication 
Thermocouple Types: J, K, T, E, 
R, S, B, C (factory set) 
Ranges: J = -200 to 760°C; 
B = 0 to 1820°C; 
K = -150 to 1250°C; 
S = 0 to 1750°C; T = -200 to 
400°C; R = 0 to 1750°C; E = -100 
to 1000°C; C = 0 to 2315°C
Resolution: +1° 
Overall Accuracy (error from all 
sources) from 0 to 40°C 
Ambient: +1.0°C max (J, K, T, E);
+2.5°C max (R, S, B, C) 
(300°C to FS)
Common Mode Rejection:
100dB at 50/60Hz
Input Impedance: 100 MΩ min
Lead Resistance Effect: <20µV
per 350 Ω
Input Burnout Protection:
to 250Vac normal mode
DIN-100 COMMON 
SPECIFICATIONS
(typical at +25°C and nominal 
power supply unless otherwise 
noted)
ANALOG 
Channels: single channel
analog input 
Common Mode Rejection: 500V 
RMS max CMV, input to output 
at 60Hz 
Leakage Current: input to output 
at 115V RMS, 60Hz; <2µA RMS 
Resolution: 15 bit 
measurement resolution 
Conversion Speed: 8 conversions 
per second 
Calibration: autozero and 
autocalibration; no adjustment pots
DIGITAL 
Microcomputer: 8-bit CMOS;
digital scaling, linearization and 
calibration 
Memory: nonvolatile memory 
eliminates pots and switches
DIGITAL FILTERING 
Filtering: small and large signal
with user selectable time constants 
from 0 to 16 seconds
COMMUNICATIONS 
Protocol: communications in ASCII
or MODBUS-RTU via RS-485 ports 
Baud Rates: selectable baud rates; 
300, 600, 1200, 2400, 4800, 9600, 
19200, 38400 
Data Format: NRZ asynchronous 
data format; 1 start bit, 8 data bits, 
1 parity bit and 1 stop bit
Parity: odd, even, none 
Address: user selectable 
channel address 
Multi-Drop Modules: up to 247 
multi-drop modules per host 
serial port 
Communications: distance up to 
4,000 feet (RS-485)
Transient Suppression:
on RS-485 communications lines
Communications Setups:
stored in EEPROM
POWER 
Requirements: regulated +5Vdc,
0.75W max (DIN-150, 2.0W max); 
protected against power supply 
reversals

To Order
(Specify Model Number)
Model No. Price Description 
Voltage Input
DIN-110 $180 +/-10mV input/RS-485 output 
DIN-111   180 +/-100mV input/RS-485 output 
DIN-112   180 +/-1V input/RS-485 output 
DIN-113   180 +/-5V input/RS-485 output 
DIN-114 180 +/-10V input/RS-485 output 
DIN-115 180 +/-100V input/RS-485 output
Current Inputs
DIN-125 180  4-20mA input/RS-485 output
Thermocouple Inputs
DIN-131   180 J thermocouple input/RS-485 output 
DIN-132   180 K thermocouple input/RS-485 output 
DIN-133  180 T thermocouple input/RS-485 output 
DIN-134   180 E thermocouple input/RS-485 output  
DIN-135   180 R thermocouple input/RS-485 output  
DIN-136  180 S thermocouple input/RS-485 output  
DIN-137   180 B thermocouple input/RS-485 output 
DIN-138   180 C thermocouple input/RS-485 output
RTD/Thermistor Inputs
DIN-141   180 .00385 RTD input/RS-485 output 
DIN-142   180 .00392 RTD input/RS-485 output 
DIN-143 180 .00388 RTD input/RS-485 output
DIN-145 180 2252Ω thermistor input/RS-485 output
Bridge Inputs
DIN-151   250 +/-60mV bridge input, 5V excitation/RS-485 output 
DIN-152   250 +/-60mV bridge input,10V excitation/RS-485 output 
DIN-153 250 +/-120mV bridge input, 5V excitation/RS-485 output 
DIN-154 250 +/-120mV bridge input,10V excitation/RS-485 output
Timer and Frequency Inputs
DIN-161 180 Frequency input/RS-485 output
Digital Inputs/Outputs
DIN-171 140 6 digital inputs/RS-485 output 
DIN-172 140 6 digital outputs/RS-485 output
RS-232/485 Converter/Repeater
DIN-191 120 RS-232/485 converter 
DIN-192 120 RS-485 repeater
C-74
C
DIN-170 DIGITAL 
INPUTS/OUTPUTS
Digital I/O: 6 digital inputs or 6
digital outputs; inputs/outputs are 
read/set in parallel 
Isolation: isolated from power 
supply ground 
Input Voltage Levels: +30V 
without damage 
Input Switching Levels: high,
3.5V min: low, 1.0V max 
Outputs: open collector 
to 30V, 100mA max. load
Vsat: 1.0V max 
@ 100mA
DIN-190 RS232/485 
CONVERTER/REPEATER
Baud Rates: 300-115200 
(dip-switch selectable)
Termination and Biasing 
Resistors: included (selectable
via internal jumpers)
Isolation: 500Vrms
DIN-140 RTD INPUTS 
RTD Input: automatic linearization
and lead compensation
RTD Types: α = .00385, .00392, 
100 Ω at 0
°C; .00388, 100 Ω at 25°C
Ranges: .00385 = -200 to 850°C;
.00392 = -200 to 600°C; 
.00388 = -100 to 125°C
Resolution: 0.1°C 
Accuracy: +0.3°C 
Common Mode Rejection: 100dB
at 50/60Hz
Input Connections: 2, 3, or 4 wire 
Excitation Current: 0.25mA 
Lead Resistance Effect:
3 wire - 2.5°C per Ω of imbalance; 
4 wire - negligible
Max Lead Resistance: 50 Ω
Input Burnout Protection:
to 120Vac common mode
DIN-145 THERMISTOR INPUTS
Thermistor Types: 2252 Ω at 25
°C 
Range: 0 to 100°C 
Resolution: 0.01°C or °F 
Accuracy: +0.1°C 
Common Mode Rejection: 100dB
at 50/60Hz
Input Burnout Protection:
to 30Vdc common mode
DIN-150 BRIDGE INPUTS 
Voltage Ranges:
+
60mV, +/-120mV
Resolution: 10µV  
Accuracy: +0.05% of FS max 
Common Mode Rejection:
100dB at 50/60Hz
Input Burnout Protection:
to 30Vdc common mode
Offset Control: full input range 
Excitation Voltage: 5Vdc, 10Vdc,
50mA max
Zero Drift: +1µV/°C max 
Span Tempco: +50ppm/°C max
DIN-160 FREQUENCY INPUTS 
Range: 1Hz to 20KHz 
Resolution: 0.005% of reading 
+ 0.01Hz 
Accuracy: +
0.01% of reading
+0.01Hz
Tempco: +20ppm/°C 
Input Impedance: 1MΩ 
Switching Level: selectable 0V,
+2.5V
Hysteresis: adjustable, 10mV-1.0V 
Input Burnout Protection: 250Vac
common mode
Each unit is supplied with a compete operator's manual and software on CD rom. 
Ordering Example: DIN-132 type K thermocouple input, RS-485 output DIN rail mount 
digital transmitter and OMEGACARESM1-year extended warranty for DIN-132 
(adds 1 year to standard 1-year warranty) and DIN-191 RS232/485 converter and
OMEGACARESM2-year extended warranty for DIN-191 (adds 2 years to standard 1-year 
warranty), $180 + 25 + 120 + 25 = $350.
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