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TX-I/O Modules
Digital Input Grounding Connections
The neutral of a digital input (on Digital Input, Universal and Super Universal modules)
can be connected to any neutral terminal on the same module. Several digital inputs
can also share a neutral terminal on the same module.
Technical Data
Digital inputs are not electrically separated from the system electronics.
Mechanical contacts must be volt-free.
Contact sensing voltage
21.5 to 25 Vdc
Contact sensing current
1.6 mA (initial current 10 mA)
Contact resistance with contacts closed
Max. 200Ω
Insulation resistance with contacts open
Max. 50KΩ
Min. closing / opening
time [ms] including
bouncing
Max. bounce time
[ms]
Max. Counting
frequency
(symmetric)
Maintained contact
80
40
Pulse contact
50
30
Counter
1)
40
30
10 Hz
1)
Counting function for TXM1.16D is on I/O points 1 through 8 only.
Digital Output Modules (TXM1.6R and TXM1.6R-M)
TXIO0018R1
TXM1.6R
24V ...250V
2
3
9
15
19
21
25
27
31
33
(1)
(2)
(3)
(4)
(5)
(6)
(4)
(5)
(6)
4
(1)
8
10
(2)
14
20
26
32
16
(3)
TXIO0021R1
TXM1.6R-M
2
3
9
15
19
21
25
27
31
33
(4)
(5)
(6)
(1)
(2)
(3)
(4)
(5)
(6)
4
(1)
8
10
(2)
14
20
26
32
16
(3)
24V ...250V
+
The TXM1.6R and TXM1.6R-M Digital Output modules provide six NO or NC (form C),
maintained or pulsed, voltage free/dry contacts.
18
Siemens Industry, Inc.
TALON TX-I/O Modules and Island Bus Technical Reference
588-587
CONFIDENTIAL: For internal use only
4/6/2010