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9.6.2
IEC-870 (RS232) port
Language:
COURIER
Transmission:
Asynchronous - RS232 voltage levels
Transmission coding:
NRZ
Frame format (switch 3 = position 0):
Asynchronous - 11 bit
(1 start bit, 8 data bits, 1 parity (even)
1 stop bit)
Frame format (switch 3 = position 1):
Asynchronous - 10 bit
(1 start bit, 8 data bits, no parity,
1 stop bit)
Baud rate:
1200 to 115200 bits per second
RS232 cable:
RS232 serial interface lead
RS232 cable length:
15m of cable (maximum)
(or 2500pF total cable capacitance)
RS232 Loading:
2 units (point to point system)
9.7
Message buffers
K-Bus
Receive Data Buffer Size:
2048 bytes or 64 messages
IEC-870
Receive Data Buffer Size:
2048 bytes or 64 messages
9.8
High voltage withstand
The high voltage withstand tests can be performed on the following independent
circuits:
Auxiliary supply
K-Bus communication port
The IEC 870 port is earthed locally and should not be tested for high voltage
withstand. It is protected by the cable screen.
9.8.1
Dielectric test (Insulation) IEC 255-5, BS 5992-3
2.0kV rms for one minute between all terminals wired together and case earth.
2.0kV rms for one minute between terminals of independent circuits.
9.8.2
High voltage impulse IEC255-5, BS 5992-3
5kV peak, 1.2/50µs, 0.5J between all terminals of independent circuits, and
terminals of independent circuits to case earth.
0kV peak on IEC-870 port
9.8.3
High frequency disturbance IEC255-22-1, BS 142-1.4.1
Class III 2.5kV peak between independent circuits, and independent circuits
to case.
Class III 1.0kV between terminals of same circuit
0kV peak on IEC-870 port
Summary of Contents for KITZ 101
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