Eaton ELC-485APTR User manual

IL05003022E.pdf
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ELC-485APTR
RS-485 Interface Adpater
Instruction sheet
1 WARNING
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 oC / 75oC.
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 0℃~55℃(Temperature), 50~95%(Humidity), pollutant degree 2
Storage -25℃~70℃(Temperature), 5~95%（Humidity）
Vibration/Shock resistance International Standard: IEC1131-2, IEC 68-2-6（TEST Fc）/ IEC1131-2 & IEC 68-2-27 (TEST Ea)
Product profile:
106,8
90
32 660
3
3,4
1
2
3
4
5
6
8
7
Units: mm
Fig. 1: Profile and Dimensions
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

IL05003022E.pdf
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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
ELC-EX08NNDN
RS-232 RS-485
x16
ELC-PC12NNDR
0
1
STOP
0
1
RUN
x16
ELC-COPBDP
Fig. 3a Fig. 3b
PIN Explanation of COM1, COM2, and RJ12
COM1-DB9 female PIN Definition RJ12 of AC Motor Drive side PIN Definition
1 RS485- 1 +15V
2 RS485+ 2 GND
3 RS485+ 3 SG-
4 RS485- 4 SG+
1
2
3
4
5
6
7
8
9
5~9 NC
5, 6 Reserved
COM2-DB9 male PIN Definition RJ12 of ELC-485APTR side PIN Definition
3, 6 RS485- 3 RS-485+
8 RS485+ 4 RS-485-
5, 9 GND 5 GND
5
2
1
4
3
6
7
8
9
1, 2, 4, 7 NC 1, 2, 6 NC
4 ELC-485APTR Termination Resistor Application
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
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.
Termination Resistor Switch
Fig. 4