2
IMR01J08-E1
2. SPECIFICATIONS
RKC communication
Interface:
Based on RS-485, EIA standard
Connection method:
2-wire system, half-duplex multi-drop connection
Communication distance:
1 km max.
The maximum communication distance will be affected by the
surrounding conditions.
Synchronous method:
Start/stop synchronous type
Communication speed:
2400 bps, 4800 bps, 9600 bps, 19200 bps
Data bit configuration:
Start
bit:
1
Data bit: 7 or 8
Parity bit: Without, Odd or Even
Stop bit: 1 or 2
Protocol:
ANSI X3.28 subcategory 2.5, A4
Polling/selecting
type
Error control:
Vertical parity (With parity bit selected)
Horizontal parity (BCC check)
Communication code:
ASCII 7-bit code
Termination resistor:
Externally
connected
Xon/Xoff control:
None
Maximum connections:
32 instruments maximum including a host computer
Signal logic:
RS-485
Signal voltage
Logic
V (A) - V (B)
≥
2 V
0 (SPACE)
V (A) - V (B)
≤
-2 V
1 (MARK)
Voltage between V (A) and V (B) is the voltage of (A) terminal for the
(B) terminal.
