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Siemens TC35i User Manual Page 31

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TC35i Terminal Hardware Interface Description
Confidential / Released
TC35i_T_HD_v01.05 Page 31/37 10.07.2003
Table 12: Characteristics (requirements) On/Off control lines
Parameter Description Conditions Min Typ Max Unit
V
high
active high 5 V
V
low
Input voltage
/IGT_IN, /PD_IN, /DTR
2 V
R
IN
Input resistance of
/IGT_IN, /PD_IN
47 kOhm
R
IN
Input resistance of
/DTR
4 6 8 kOhm
t
D_IGT
Duration of active high
/IGT_IN, /DTR
200 ms
t
D_PD
Duration of active high
/PD_IN
3.5 s
t
R_IGT
Rise time /IGT_IN for
power up
0% to 100% 20 ms
t
R_RTS
Rise time /DTR
for power up
0% to 100% 20 ms
t
D_passive
Duration passive (low)
of /IGT_IN, /DTR
before restart
after power down 1 s
Table 13: Characteristics (requirements) RS-232 interface
Parameter Description Conditions Min Typ Max Unit
V
OUT
Transmitter Output
Voltage for
/RXD, /CTS, /DSR,
/DCD, /RING
@ 5kOhm load
±5 ±6 ±7
V
R
OUT
Transmitter Output
Resistance
/RXD, /CTS, /DSR,
/DCD, /RING
770 Ohm
R
IN
Receiver Input
Resistance
/TXD, /RTS, /DTR
4 6 8 kOhm
V
RIHYS
Input Hysteresis 0.2 0.5 1 V
V
Ilow
Input Threshold Low 1.0 1.8 V
V
Ihigh
Input Threshold High 2.4 3 V
Autobauding 4.8 115 kbps Baudrate
Fixed range 0.300 115 kbps
LE
Cable
Length of RS-232 cable 1.8 2 m
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