Eaton Electrical ELC-485APTR User Manual
IL05003022E.pdf
ELC-485APTR
Instruction sheet
RS-485 Interface Adpater
1
ELC-485APTR is an OPEN-TYPE. Please place the module in an enclosure away from airborne dust or high humidity
and prevent electric shock or sudden collision on ELC-485APTR. Also, it is equipped with protective methods such as
some special tool or key to open the enclosure, so as to avoid the hazard to users or any damage to the module. Do
NOT touch terminals when power on.
I/O terminal screws should be tightened to between 1.95 kg-cm (1.7 in-lbs). Use copper conductor only, 60
2 INTRODUCTION
ELC-485APTR is mainly designed to connect Eaton product by RS-485 interface. It is equipped with surge absorber and
limited current protection to ensure safe connection of different devices. Also, a switch enabled built-in terminator (120Ω).
Environmental Specification:
Operation
Storage
Vibration/Shock resistance
0℃~55℃(Temperature), 50~95%(Humidity), pollutant degree 2
-25℃~70℃(Temperature), 5~95%（Humidity）
International Standard: IEC1131-2, IEC 68-2-6（TEST Fc）/ IEC1131-2 & IEC 68-2-27 (TEST Ea)
WARNING
o
C / 75oC.
Product profile:
1
2
3
4
6
7
8
90
106,8
5
3
32
6
Fig. 1: Profile and Dimensions
60
Units: mm
3,4
1. Mounting plate
2. COM 1 (DB9 female)
3. COM 2 (DB9 male)
4. Nameplate
5. ON/OFF of termination resistor (factory
setting: OFF)
6. DIN rail (35mm)
7. RS-485 port
8. RJ12 port
3 ELC-485APTR Connection with Eaton Products
Connection of ELC-485APTR and AC Motor Drive (please see AC motor drive user manual for detail information)
MVX 9000
RS-485 Network
Fig. 2: ELC controller connection with MVX9000
1
IL05003022E.pdf
Compact Installation reference:
See Fig. 3a in lower left, when ELC-485APTR is separated from mounting plate, it can be used as the last extension module
with its RS-485 port connecting to ELC controller’s (see Fig. 3b for illustration). This connection is feasible for ELC controller to
connect AC Motor Drive within 5 meters.
MVX 9000
1
RUN
STOP
x16
0
x16
ELC-PC12NNDR
0
1
ELC-EX08NNDN
ELC-COPBDP
RS-232
RS-485
Fig. 3a Fig. 3b
PIN Explanation of COM1, COM2, and RJ12
COM1-DB9 female
1
2
3
4
5
COM2-DB9 male
5
4
3
2
1
6
7
8
9
9
8
7
6
PIN Definition
RJ12 of AC Motor Drive side
1 RS485- 1 +15V
2 RS485+ 2 GND
3 RS485+ 3 SG-
4 RS485- 4 SG+
5~9 NC
PIN Definition
RJ12 of ELC-485APTR side
3, 6 RS485- 3 RS-485+
8 RS485+ 4 RS-485-
5, 9 GND 5 GND
1, 2, 4, 7 NC
4 ELC-485APTR Termination Resistor Application
PIN Definition
5, 6 Reserved
PIN Definition
1, 2, 6 NC
In all RS-485 installations, the cable must be correctly terminated with two sets of resistors, one set at each end of the network
(4,000 feet maximum total cable length). This applies even if you are only using one slave node connected to one master
device. The terminating resistors prevent reflection problems that can interfere with data transmission. The resistance value of
the terminating resistors should match the characteristic impedance of the cable. A typical value is 120 ohms. The terminating
resistors must be placed at the two farthest ends of the RS-485 network, regardless of where the master device is. In some
cases master device RS-485 ports have built in or optional terminating resistors. Beware of your network (whether it has one
node or 32 nodes) having only two sets of terminating resistors.
ELC-485APTR’s Termination Resistor Switch is located inside of the
Termination Resistor Switch
adapter’s extension port.
Switch ON the termination resistor for ELC-485APTR on the both ends only
and switch OFF (factory setting) for the modules between both ends when
modules are connecting in parallel.
Fig. 4
2
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