Obv-485Tai/485Tao/Aio - Hitachi MICRO-EHV+ Applications Manual

2.20.3 OBV-485TAI/485TAO/AIO

Name and function of each part
(1) Communication port or
Analog input terminal
(4) Connector to basic unit
(Back side)
No. Type
(1) OBV-485TAI Communication
/485TAO port
OBV-AIO Analog
Input terminal
(2) OBV-485TAI
OBV-485TAO Analog
Output terminal
OBV-AIO
(3) OBV-485TAI LED
/485TAO
OBV-AIO
(4) Common Connector
Communication port signal and internal circuit
Terminal layout
1
4
Terminal
(Top view)
Analog Input signal and internal circuit (each "–" signal connected internally)
Terminal layout
1
4
Terminal
(Top view)
Analog Output signal and internal circuit (each "–" signal connected internally)
Terminal layout
1
4
Terminal
(Top view)
Item
supports dedicated protocol, general purpose and Modbus-RTU functions.
[Programming] Communication with HMI or programming software etc.
[General purpose] Communication with external equipments controlled by user program.
[Modbus-RTU] Communication with external equipments supporting Modbus-RTU protocol.
Use shielded twisted pair cable.
Terminals to connect analog voltage signals
Cable diameter :
SD：blinks when data is sent
RD：blinks when data is sent or received.
- There is no LED
A connector is located at the back side to connect basic unit.
No. Signal
[1] SDP Data +
[2] SDN Data -
[3]
TERM Termination resistor
[4]
SG Signal ground
No. Signal
[1] IN1+ CH1+
[2] IN1- CH1-
[3]
IN2+ CH2+
[4]
IN2- CH2-
No. Signal
[1] OUT1+ CH1+
[2] OUT1- CH1-
[3]
OUT2+ CH2+
[4]
OUT2- CH2-
2 – 39
Type
Weight
(3) LED
(2) Analog input terminal or
Analog output terminal
Description
2
Single wire : 0.2 mm to 1.5 mm
2
Strand wire : 0.2 mm to 1.0 mm
Meaning
Meaning
Meaning
Chapter 2 Specifications
OBV-485TAI/485TAO/AIO
20g (0.04 lb.)
2
2
Internal circuit
① SDP
+
-
② SDN
-
③ TERM
+

120
④ SG
Internal circuit
① IN1+
② IN1-
③ IN2+
④ IN2-
Internal circuit
① OUT1+
② OUT1-
③ OUT2+
④ OUT2-