25
Installation
Section 2-2
RS-422A/485
Connections
(C200H-ASC21 Only)
Using the enclosed connector, connect the pins to match the external device
interface.
RS-422A/485 Interface Specifications
Note
1.
For details on connecting cables, see
Appendix F
Wiring RS-232C or RS-
422A/485 Cable Connectors
.
2.
When the 2/4-wire switch is set for 2-wire operation, use either pins 1 and
2, or pins 6 and 8. (Pins 1 and 6 are short-circuited, and pins 2 and 8 are
short-circuited.)
Pin
Symbol
Name
Direction
1
SDA
Send data A (–)
Output
2
SDB
Send data B (+)
Output
3
NC
Not used
-
4
NC
Not used
-
5
NC
Not used
-
6
RDA
Receive data A (–)
Input
7
NC
Not used
-
8
RDB
Receive data B (+)
Input
9
NC
Not used
-
Hood
FG
Frame ground
-
1
5
9
6
Item
Specifications
Communications mode
Half duplex (1 ms is required after transmission has been completed until the ASCII
Unit is ready to receive.)
Electrical characteristics
Conform to EIA RS-422A/485
Synchronization
Start-stop
Baud rate
300/600/1,200/2,400/4,800/9,600/19,200/38,400 bps
Transmission mode
Point-to-multipoint (1:N)
Communications buffer
Transmit: 512 bytes; receive: 512 bytes
Flow control
None
Applicable connector (enclosed)
Plug: XM2A-0901 or equivalent
Connector hood: XM2S-0911 or equivalent
Recommended cable
UL2464 AWG28x5P IFS-RVV-SB (UL product)
AWG28x5P IFVV-SB (non-UL product)
Fujikura Ltd.
UL2464-SB(MA) 5Px28AWG (7/0.127) (UL product)
CO-MA-VV-SB 5Px28AWG (7/0.127) (non-UL
product)
Hitachi Cable, Ltd.
Cable length
500 m max.
Summary of Contents for C200H-ASC11
Page 1: ...C200H ASC11 ASC21 ASC31 ASCII Units Operation Manual Revised June 2000...
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