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Confidential / released – Siemens TC35i User Manual

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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