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Product Overview
Terminal Block
Connectors
A – F
DIP
Switches
1 - 8
+
Power Requirement
10 - 30 VDC, steady state
In-Rush Current at 24 VDC = 750 mA for 500 μS
1
Connections
TERMINAL BLOCK
SIGNAL
A
OUT (+)
B
OUT (-)
Signal
C
Ground
D
Power Ground
E
IN (+)
F
IN (-)
G
IN (+)
H
IN (-)
J
+10 to 30 VDC
K
OUT (+)
L
OUT (-)
M
Signal Ground
All manuals and user guides at all-guides.com
2
Wiring Examples
Your RS-485
2-Wire Device
Terminal Block
Connectors
G – M
Negative -
Positive +
Signal Gnd 1
DIP
Switches
1 - 8
POWER
SUPPLY
-V
L
4-Wire RS-422/485 System
Your RS-422/485
4-Wire Device
TDA (-)
TDB (+)
A-F Side
RDA (-)
RDB (+)
Signal Gnd 1
POWER
SUPPLY
G-M Side
-V
L
2-Wire RS-485 System
Your RS-485
2-Wire Device
Cable is 2 twisted pairs
+ shield (not shown)
485OPDR-HS
Out -
B
H
In -
Out +
A
G
In +
In -
F
L
Out -
K
Out +
In +
E
10-30
J
GND
D
VDC
M
IGND1
IGND2
C
NC
+V
N
AC Power Lines
or AC Outlet
Using Plug
Your RS-422/485
4-Wire Device
485OPDR-HS
Out -
B
H
In -
G
In +
Out +
A
In -
F
L
Out -
K
Out +
In +
E
10-30
J
GND
D
VDC
M
IGND1
IGND2
C
NC
+V
N
AC Power Lines
Signal
or AC Outlet
Ground 2
Using Plug
4-Wire RS-485 to 2-Wire RS-485
Your RS-485
4-Wire Device
TDA (-)
TDB (+)
RDA (-)
RDB (+)
Negative -
Positive +
Signal Gnd 1
POWER
SUPPLY
-V
NC +V
L
N
Signal
+
NOTE: 2-Wire masters are not able to support 4-Wire
Ground 2
slaves without data loss due to timing issues.
3
DIP Switches
RS-422, 2-Wire RS-485, or 4-Wire RS-485
Sample Settings
2-Wire RS-485 Half-Duplex Operation
Switches 1, 2, 3, 4, 5 = ON
Switch 6 = OFF
Switches 7, 8 = Not Used
RDA (-)
RDB (+)
4-Wire RS-485 Operation
TDA (-)
Switch 1 = ON
TDB (+)
Switches 2, 3, 4 = OFF
Switch 5 = ON
Switch 6 = OFF
Switches 7,8 = Not Used
4-Wire RS-422 Operation
All Switches = OFF
Echo
RS-485
Off
Switch
1
ON
ON
Position
OFF
OFF
Echo
RS-422
On
Your RS-485
2-Wire Device
Cable is 2 twisted pairs
+ shield (not shown)
485OPDR-HS
Negative -
Out -
B
H
In -
Positive +
G
In +
Out +
A
In -
F
L
Out -
K
Out +
In +
E
10-30
J
GND
D
VDC
M
IGND1
IGND2
C
AC Power Lines
Signal
or AC Outlet
Ground 2
Using Plug
Bias
Term
Not
Not
2W 2W
IN
IN
Used
Used
2
3
4
5
6
7
8
ON
ON
ON
ON
***
***
OFF OFF
OFF
OFF
***
***
Bias
Term
Not
Not
4W
4W
OUT
OUT
Used
Used
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