Acksys MI400 Series, Technical Documentation Manual

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Page 1-7
Distortion
(deviation in relation to I/O pulses)
Input/output delay
Maximum load in RS422A
(limited by EIA standard)
Maximum load in RS485
(limited by EIA standard)
Maximum load in RS422A or
RS485 HOMOGENOUS
NETWORK based on MI400xxx,
RKMI400xxx
Input resistor
(RS422A or RS485 interface)
Maximum transmission, line
interface distance
(RS422A-RS485)
(limited by EIA standard,
depending on the speed and type of
cable used)
Type of cable to use
(RS422A-RS485)
Transmission, system interface
distance (RS232D)
Protection against transient
overvoltages (RS232D)
0.2% at 112 Kbits/sec
1.8% at 250 Kbits/sec
< 1 µsec
10 receivers
32 transmitters/receivers
256 interfaces
70 Kohms minimal, 96 Kohms typical.
1,200 meters for 24 gauge (0.22 mm²) cable
with a capacity of 50 pF/m between conductors
24 gauge twisted pairs, 50 pF/m, and nominal
impedance of 120 Ohms.
High interference in industrial environments,
requiring use of a ground screen (capacity
between ground screen and conductor and 75
pF/m)
Minimum 15 meters
By peaks, breakdown voltage
±
7 V in common
mode,
±
14 V in differential mode, absorption
capacity: 0.4 kW for 1 ms.