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EKI-6333AC-4GP User Manual
2.2.5
Serial Connection
The devices provide 4-pin terminal block serial port for connecting to your serial
device. Connect the serial device to the terminal block with the right pin assignments
of RS-232/485 are shown as below.
Figure 2.13 Serial Pin Position
2.2.6
DI/DO Connection
There are one DI and one DO ports together with power terminal block. Please refer
to the following specification to connect DI and DO devices.
Figure 2.14 Example of Connection Diagram
Pin1
Pin2
Pin3
Pin4
RS-232
GND
RXD
TXD
GND
RS-485
GND
DATA-
DATA+
GND
4
1
Mode
Specification
Digital Input
Trigger Voltage (high)
Logic level 1: 5V ~ 30V
Normal Voltage (low)
Logic level 0: 0V ~ 2V
Digital Output
Voltage (Relay Mode)
Depends on external device maximum voltage is
30V
Maximum Current
1A
VSRC
PWR1
PWR2
GND
GND
DI+
DI
DO+
DO
VSRC
BUTTON
ALARM
