![Siemens Simatic S7-300 Installation And Operating Manual Download Page 124](http://html.mh-extra.com/html/siemens/simatic-s7-300/simatic-s7-300_installation-and-operating-manual_374640124.webp)
Digital modules
8.4 SM 326; DI 8 x NAMUR
Fail-safe signal modules
124
Installation and Operating Manual, 01/2010, A5E00085586-10
8.4.9
Technical data - SM 326; DI 8 x NAMUR
Overview
Technical data
Dimensions and Weight
Dimensions W x H x D (mm)
80 x 125 x 120
Weight
Approx. 482 g
Module-Specific Specifications
Number of inputs
Single-channel
8
Dual-channel
4
Assigned address area
In the I/O input area
6 bytes
In the I/O output area
4 bytes
Cable length
Shielded
200 m, maximum
Unshielded
100 m, maximum
Front connectors
40-pin
Ignition protection type
II 3 (2) G Ex nA [ib] IIC T4 to EN 60079-11,
EN 60079-0, EN 60079-15
Test number KEMA
99 ATEX 2671 X
Maximum achievable Safety Integrity Level in
safety mode
Single-channel
Dual-channel
According to IEC 61508
SIL 2
SIL 3
According to EN 954-1
Category 3
Category 4
According to ISO 13849:2006
PLd
PLe
Fail-safe performance characteristics
SIL 2
SIL 3
low demand mode (average probability of
failure on demand)
< 1.00E-04
< 1.00E-05
high demand / continuous mode
(probability of a dangerous failure per hour)
< 1.00E-08
< 1.00E-09
Voltages, Currents, Potentials
Rated supply voltage of the electronic system
and sensors L +
24 V DC
Reverse polarity protection
Yes
Power failure ride-through
5 ms
Number of simultaneously controllable inputs
Horizontal installation up to 60 °C
8
Vertical installation up to 40 °C
8