Communication Cable Connection - Hitachi MICRO-EHV+ Applications Manual

Chapter 2 Specifications

2.20.5 Communication cable connection

The following figure shows the communication cable connection example. Be sure to use shielded twisted pair
cable.
[OBV-NES]
MICRO-EHV+
OBV-NES
Terminal
[5] SP
resistor
[6] SN
120Ω
(1/2W)
[4] SG
[OBV-485A]
The example of the cable connection of RS-422 I/F is shown below.
Peripheral device
SG
SD–
SD+
Termination
RD+
resistor
RD–
120Ω
(1/2W)
The example of the cable connection of RS-485 I/F is shown below.
Peripheral device
SG
Termination
SP(+)
resistor
SN(-)
120Ω
(1/2W)
[OBV-485TAI/485TAO]
The example of the cable connection of RS-485 I/F is shown below.
Peripheral device
Termination
SDP
resistor
SDN
120Ω
(1/2W)
SG
MICRO-EHV+
OBV-NES
[5] SP
[6] SN
[4] SG
MICRO-EHV+
OBV-485A
[1] SG
[4] SDP
[5] SDN
[6] RDN
[7] RDP
[8] TERM
MICRO-EHV+
OBV-485A
[1] SG
[4] SDP
[5] SDN
[6] RDN
[7] RDP
[8] TERM
MICRO-EHV
OBV-485TAI/485TAO OBV-485TAI
[1] SDP
[2] SDN
[3] TERM
[4] SG
2 – 46
MICRO-EHV+
OBV-NES
[5] SP
[6] SN
[4] SG
MICRO-EHV+
OBV-485A
[1] SG
[4] SDP
[5] SDN
[6] RDN
[7] RDP
[8] TERM
MICRO-EHV+
OBV-485A
[1] SG
[4] SDP
[5] SDN
[6] RDN
[7] RDP
[8] TERM
MICRO-EHV
/
485TAO
[1] SDP
[2] SDN
[3] TERM
[4] SG
Terminal
resistor
120Ω
(1/2W)