WEIHONG EX35A User manual

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SHANGHAI WEIHONG ELECTRONIC TECHNOLOGY CO., LTD.
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EX35A Terminal Board Instruction
Version: 2019.5 1st Version
Author: Document Department
Weihong Corporation, All Rights Reserved
Dear customers,
Please carefully read this instruction manual before you install the terminal board
and set up the CNC system. For more product information, find at WEIHONG
Documentation.
1Safety Precautions
Before using the terminal board, please pay much attention to the following:
•This terminal board is used for extending output ports. Do not touch any
internal circuit or components when you power up the terminal board.
•Internal circuit of the terminal board consists of CMOS IC that can be destroyed
by static electricity. Therefore, do not touch any circuit board before you take
any preventive actions.
•The terminal board is a type of fine instruments. Do not discharge any
components by yourself.
•Make sure surrounding environment is safe and clean, to avoid any possible
damage from iron dust, wire, water, corrosive gas, or corrosive liquid.
•Ambient temperature: -40°C~85°C; Ambient humidity: 0%~90%, no freezing
and condensation.
•The terminal board must be safely grounded, to avoid thunder shock or
electrical leak.
•Space of over 50mm in each side must be secured to ensure good ventilation or
heat dissipation. Recommended operating temperature: 0°C~55°C.
•Rated power for the terminal board should be within range of 24V±10%. Use a
power regulator in case of instable power supply.
•Before connecting or disconnecting with the terminal board, make sure the
power is off, to avoid electrical shock to the personnel or damage to the
terminal board.

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SHANGHAI WEIHONG ELECTRONIC TECHNOLOGY CO., LTD.
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•When installing or wiring the terminal board, make sure the position of each
terminal to avoid possible damage from wrong connection.
2Product Introduction
WEIHONG EX35A terminal board is a extension board for Lambda series terminal
boards. It adopts modular design in appearance, which makes it easy to install. It has
the following features:
•Supports two groups of interfaces for 24V power supply:
–Group A: +24V_A，COM_A
–Group B: +24V_B，COM_B
•Supports 32 output ports at most.
•For each output, supports 24V/3A in voltage/current.
•Supports cascading connection of other extension boards.
3Terminal Definition
See the following for terminal definitions:

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SHANGHAI WEIHONG ELECTRONIC TECHNOLOGY CO., LTD.
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No.
Interface Type
Description
1
Power
supply(+24V_A)
+24V input, supplying power for the internal circuit and
Y00~Y15 terminals. Two terminals for +24V_A(internal,
positive); one for COM_A(negative); one for grounding.
2
Output ports
16 24V output(Y00~Y15). For each output, supports
current 3A at most, with prevention for short circuit.
3
Communication
interface
Connects to extension terminal board
4
Output ports
16 24V output(Y16~Y31). For each output, supports
current 3A at most, with prevention for short circuit.
5
Power
supply(+24V_B)
+24V input, supplying power for Y16~Y31 terminals. If
Y16~Y31 terminals are not used, it can be disconnected
with the power supply. Two terminals for
+24V_B(internal, positive); two for COM_B(internal,
negative)
6
Communication
interface
Connects to the upper controller
4System Running Indicator
See the following for flashing frequency of SYSTEM LED indicator in the terminal
board, by which you can know communication status of the terminal board.
Flashing Frequency
Communication Status
0.33Hz
Not connected with the controller
2Hz
Good connection and communication with the controller
10Hz
Communication error
Light off or light on
all the time
Hardware exception. For example: insufficient voltage,
damaged hardware, pseudo soldering, and short circuit,
etc.

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SHANGHAI WEIHONG ELECTRONIC TECHNOLOGY CO., LTD.
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5Dimensions
Front view(unit: mm)
Side view(unit: mm)

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SHANGHAI WEIHONG ELECTRONIC TECHNOLOGY CO., LTD.
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6Internal Circuit
See the following figure for internal circuit of the terminal board:
7Wiring Precautions
For wiring and electrical connection, please pay much attention to the following:
•Use 24V DC power supply with safety certification and self-protection function,
to avoid possible damage from wrong wiring.
•For wire that is made for power supply or output port terminals, make sure the
terminal is well stannum-plated.
•Use WEIHONG DB9 cable to ensure communication stability.
•Length of the earthing cable should depend on technical requirements of the
electrical device. Generally, the shorter, the better.
•The earthing cable for the terminal board must be separate with earthing
cables for device with high current load, for example, electric welding machine,
or motor.
•In case that 24V DC power only supplies power for one 24V_A, maximum
output current for Y00~Y15 is 15A; in case that 24V DC power supplies power
for two 24V_A, maximum output current for Y00~Y15 can be greater than 15A.
•In case that 24V DC power only supplies power for one 24V_B, maximum
output current for Y16~Y31 is 15A; in case that 24V DC power supplies power
for two 24V_B, maximum output current for Y16~Y31 can be greater than 15A.

Shanghai Weihong Electronic Technology Co., Ltd.
Address: No. 1590, Huhang Rd., Fengxian, Shanghai, China, 201401
Hot-line: 400 882 9188
Website: www.weihong.com.cn/en
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