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2-2-9 Connecting RS-485 Output (Optional Function)
When using RS-485 interface equipped WGI-400-03 and WGI-400-13.
Various functions can be set as well as measured values can be read from external devices.
1) Connector Pins and Signal Names
Pin type (male)
Front view of the RS-485 connector
(D-sub connector) on the rear panel.
2) Signal Specifications
Transmission speed:
Data bit:
Parity bit:
Stop bit:
Output code:
The above settings are default values.
3) Connecting to External Devices
(1) Connection
• For connecting external devices to the PC, use RS-485 ↔ RS-232C converter (Following is a
recommended converter).
• Short-circuit connector pins Nos. 6 and 9. Then, terminating resistance applied state is obtained.
• Set the converter switch to DTE.
• Pin Nos. 1 and 2 as well as 3 and 4 are the same functions. Correctly connect the wires.
Recommended converter: SI-30 (RS-485 ↔ RS-232C converter) LINEEYE CORP. made
Note: Do not forget to turn OFF both WGI-400A and external devices before connecting to the PC.
Or, the WGI-400A may not operate correctly or cause damage.
9600 bps
7 bits
Odd number parity
1 bit
ASCII
WGI side
1
+(Nonreverse output)
2
+(Nonreverse output)
3
-(Nonreverse output)
4
-(Nonreverse output)
SG
5
Terminator
6
N.C.
7 Short
N.C.
8
Terminator
9
Pin No.
1
+(Non-reversing output)
2
+(Non-reversing output)
3
- (Reversing output)
4
- (Reversing output)
5
SG
6
Terminator
7
N.C.
8
N.C.
9
Terminator
Receive delimiter:
Transmit delimiter:
PC side
Converter
SD/RD+
SD/RD-
GND
12
Signal Name
CR
CR + LF
RS-232C
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