© 2016 Littelfuse Protection Relays & Controls
Protection Relays
Communication Modules
www.littelfuse.com/cioen
Rev: 1-A-062716
CIO-EN
Description
The CIO-EN Module (non-POE) is a convenient and cost-
effective Modbus-TCP and Modbus-RTU interface capable of
providing discrete control and monitoring of an overload relay
over a Modbus network.
Features & Benefits
FEATURES BENEFITS
Compact size
3.4” H x 1.0” W x 5.46” D
Easily adapts to existing as well as
new applications
Flexible addressing
standard allows function
as stand-alone interface
or in conjunction with
777 series overload relay
Provides flexibility for control and monitoring
Remote reset option
Additional remote reset input allows user to reset
777 series relays without opening the panel
DIN rail or surface
mountable
Allows installation flexibility
Built in Ethernet jack Reduces field wiring
Communication link to PLC/SCADA/
monitoring systems
Wiring Diagram
Specifications
Input Characteristics
Power Requirements:
Voltage 24VDC +10%
Current 95mA (max.) 70mA (typical)
Power 2.28 W (max.) 1.7 W (typical)
Digital Inputs
General Purpose (4)
Voltage Range 12-24VDC
Current 2mA (typical)
Functional Specifications
Remote Reset (for use with
optional 777 Series) Normally open pushbutton rated 24VDC,
10mA (min.)
Ethernet Controller IEEE 802.3
Capability 10Base-T
Output Characteristics
SPDT (1), SPST (1)
Pilot Duty 480VA & 240VAC, B300
General Purpose 5A @ 240VAC
General Characteristics
Ambient Operating
Temperature -20° to 70°C (-4° to 158°F)
Terminal (depluggable
terminal block)
Torque 3 in.-lbs. (max.)
Wire AWG 12-20 AWG
Class of Protection IP20, NEMA 1 (finger safe)
Relative Humidity 10-95%, non-condensing per IEC 68-2-3
Standards Passed
Electrostatic Discharge (ESD) IEC 61000-4-2, Level 3, 6kV contact, 8kV air
Radio Frequency
Immunity, Radiated 150 MHz, 10V/m
Fast Transient Burst IEC 61000-4-4, Level 3, 4kV input power
Hi-Potential Test Meets UL508 (2 x rated V + 1000V for 1 min)
Surge
Input Power IEC 61000-4-5, Level 1
Inputs/Data Lines IEC 61000-4-5, Level 2
Safety Marks
UL UL508 (File #E68520)
CSA C22.2 (File #46510)
CE IEC 60947-6-2
Enclosure Polycarbonate
Dimensions H 86.36 mm (3.4”); W 25.4 mm (1.0”);
D 138.68 mm (5.46”)
Weight 0.25 lb. (4 oz., 113.4 g)
Mounting Methods DIN Rail or surface mount (w/two #8 screws)
