Specifications

February 2009
CA08102001E For more information visit: www.eaton.com
50-25
PLC, I/O & Communications Products
50
IT. Connect
Communication Adapters (D77D Series) — Modbus Adapter
Cat. No. D77D-EMA
Product Description
The Cutler-Hammer Intelligent
Technologies (IT). Ethernet Modbus
Adapter (D77D-EMA) from Eaton’s
electrical business has greatly
increased the functionality of Cutler-
Hammer IT. communicating products,
allowing monitoring and control for IT.
motor control devices. The adapter
concentrates all data from these
devices into a single Modbus node.
The Modbus Adapter supports not
only Modbus TCP but also Modbus
serial (ASCII and RTU) as a slave
device. This combination of the two
physical layers provides for ultimate
functionality when connecting to a
Modbus system. A unique attribute
of the D77D-EMA is that it supports
Modbus serial Pass-Through. In this
mode a customer can connect Modbus
serial devices to one of the channels
and monitor and control them over
Modbus TCP.
To simplify the configuration of the
D77D-EMA, a simple auto-configure
button press sets the system up for
default operation. This automatically
configures the Modbus registers to the
I/O system devices.
Application Description
In a typical Modbus Adapter applica-
tion, the D77D-EMA connects directly
to Modbus, and resides in a system
with communicating motor controls.
The data from these IT. devices is
assembled into input and output
registers before being presented
to Modbus.
Features, Functions and Benefits
■ Communication to Modbus
consuming one address.
■ Supports Boot P and static
IP addressing.
■ 10/100 BaseT Connection.
■ RS-485 Modbus slave serial
connection.
■ Supports Serial Modbus Pass-
Through over Modbus TCP.
■ Provides for control of all IT.
communicating devices connected
to the gateway.
■ Manually set to address and baud
rate for serial Modbus; configura-
tion using a software application is
not required for normal operation.
■ Single button press auto configures
the gateway, setting up the system
for default operation.
■ Advanced configuration using
CH Studio.
■ Provides for backplane and
interconnect cable connections
to motor control products.
■ Two independent ports.
■ Powered from backplane.
■ Isolated from Modbus.
■ Status LEDs for Modbus and
module health.
■ Provides for configuration of I/O
devices over Modbus TCP.
■ Small package size.
■ DIN-rail mountable.
Standards and Certifications
Approvals
Table 50-34. Approvals/Certifications
Technical Data and Specifications
Table 50-35. Environmental Ratings Table 50-36. Modbus Specifications
Description Specification
Electrical/EMC
ESD Immunity (IEC 61000-4-2) ± 8 kV air, ± 4 kV contact
Radiated Immunity (IEC 61000-4-3) 10V/m 80 – 1,000 MHz, 80% amplitude modulation @ 1 kHz
Fast Transient (IEC 61000-4-4) ± 2 kV supply and control, ± 1 kV communications
Surge (IEC 61000-4-5) ± 1 kV line-to-ground, ± 2 kV line-to-line
RF Conducted (IEC 61000-4-6) 10V, .15 – 80 MHz
Magnetic Field (IEC 61000-4-8) 30A/m, 50 Hz
Other Approvals
Ingress Protection Code IP20
Radiated and Conducted Emissions EN 5011 Class A
Agency Certifications UL 508, CUL (CSA C22.2 No. 14), CE (Low Voltage Directive),
Modbus Conformance Tested
Description Specification
Transportation/Storage
Temperature -58° – 176°F (-50° – 80°C)
Humidity 5 – 95% non-condensing
Operating
Temperature -13° –149 °F (-25° – 65°C)
Humidity 5 – 95% non-condensing
Altitude Above 6,600 ft. (2,000m)
consult factory
Shock
(IEC 68-2-27)
15G any direction for
11 mS
Vibration
(IEC 68-2-6)
5 – 150 Hz, 5G .7 mm
maximum peak-to-peak
Pollution Degree 2
Description Specification
Connections 10/100 BaseT
RS-485
I/O Size 1024 Registers Input
1024 Registers Output
Baud Ethernet 10 Megabit
Serial 1200 to 115.2K baud
Addressing Ethernet – Boot P or Static IP
Serial – DIP Switch 1 – 255
Channels 2 Independent
Channels