Lanex TR-55.1, Руководство по эксплуатации

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C
ONVERTER
RS-232, RS-422, RS-485
O
PERATION
M
ANUAL
IOA55-1c August 2009
18
5.2 Electrical Parameters of the RS-232, RS-422, RS-485 Interfaces
5.2.1 The RS-232 Interface
Table 7. Low/high voltage electrical parameters for the RS-232 standard
Type Voltage level
L
+3
≤
V
≤
+15
H
-3
≥
V
≥
-15
5.2.2 The RS-422 and RS-485 Interfaces
The high/low voltage ranges for RS-422 and RS-485 interfaces are shown in table 8.
Table 8. Electrical parameters for the RS-422 and RS-485 interfaces.
Type Voltage level
L
VA-VB
≥
0,3V
H
VA-VB
≤
–0,3V
Differential output impedance for the RS-422 and RS-485 converters is 120
Ω
.
5.3 Mechanical Parameters
Table 9. Mechanical parameters of the TR-55 converter
Feature Value
Width 45 mm
Height 75 mm
Depth (without hanger and connectors) 101 mm
Mass
≤
160 g
5.4 Environmental Requirements
5.4.1. Operation
These devices can work in closed rooms which are unevenly heated in the following
climatic conditions:
Table 10. Environmental parameters for maintenance
Environmental parameter Permissible value
Industrial
TR-55.1/2-X-Y
-10
°
C
÷
+55
°
C
Ambient
temperature
Type
Extreme
TR-55.1/2-X-Y T
-40
°
C
÷
+75
°
C
Relative air humidity
max 95% in the temperature of +20
°
C