DigitalFlow™ GF868 Programming Manual (2-Channel)
79
Chapter 6. Serial Communications
6.5 The Optional RS485 Serial Interface
Although the standard RS232 serial interface included with the Model GF868 is adequate for most applications, GE
offers an optional RS485 serial interface upgrade for special situations. The Model GF868 is easily modified to provide
RS485 communications, and this section describes the wiring and use of the special RS232 to RS485 converter.
Note:
For compliance with the European Union’s Low Voltage Directive, this unit requires an external power
disconnect device such as a switch or circuit breaker. The disconnect device must be marked as such, clearly
visible, directly accessible, and located within 1.8 m (6 ft) of the electronics console.
6.5.1 Interface Converter Mounting
A special bracket containing the serial interface converter and a three-terminal barrier strip is mounted inside the
Model GF868, just below the
RS232
terminal block (see Figure 9). The standard
RS232
terminal block is wired to the
input of the serial interface converter, and the RS-485 output of the serial interface converter is wired to the barrier
strip.
Figure 9: Interface Converter Mounting
RS 232
T T
T
R
T
S
N
R
X
X
C D
R
DN
CHAN 1
G
I
S
G
N N
S
I
R
T
R
T
UP
D
C
R
S
- XMT +
Red (XMT+)
RS232 Terminal Block
Standoff
Mounting Bracket
Barrier Strip
LVD Shroud
Green (XMT–)
Grounding
Screw
G N/L2 L1 AC
G – + DC
Содержание DigitalFlow GF868
Страница 2: ......
Страница 4: ...ii no content intended for this page ...
Страница 10: ...Contents viii DigitalFlow GF868 Programming Manual 2 Channel no content intended for this page ...
Страница 60: ...Chapter 2 Displaying Data 50 DigitalFlow GF868 Programming Manual 2 Channel no content intended for this page ...
Страница 95: ...DigitalFlow GF868 Programming Manual 2 Channel 85 Appendix A Menu Maps Appendix A Menu Maps ...
Страница 96: ...86 DigitalFlow GF868 Programming Manual 2 Channel no content intended for this page ...
Страница 104: ...Appendix A Menu Maps DigitalFlow GF868 Programming Manual 2 Channel 94 ...
Страница 108: ...98 DigitalFlow GF868 Programming Manual 2 Channel no content intended for this page ...
Страница 146: ...Warranty 136 DigitalFlow GF868 Programming Manual 2 Channel no content intended for this page ...
Страница 150: ......
Страница 151: ......