Connect The Signal Inputs - Siemens SITRANS DA400 Operating Instructions Manual

Connecting

5.6 Connect the signal inputs.

5.6 Connect the signal inputs.
General instructions
• For the maximum four signal inputs "In 1" to "In 4," joints (2) and (3) are available, each
• Cable joints (2) should be used for signal inputs "In 1" and "In 3."
• Cable joint (3) should be used for signal inputs "In 2" and "In 4."
• In connecting several signal sources (analog current and 24 V digital signal), be sure that
Notice
Electromagnetic compatibility
Use shielded conduits in a disturbed environment to assure high electromagnetic
compatibility. Connect the shield to the mounting plate in the SITRANS DA.
Notice
Explosion protection
As a matter of safety, all shields on shielded conduits should be laid two-sided, and the
associated functioning parts should be connected to the potential balance of the external
area. Use only approved safe feed sources, as described in the chapter "Technical data."
Connect analog current 0/4 to 20 mA
Connect the analog current line in accordance with the following table:
Current signal
Connecting the 24 V digital signal
Connect the signal line in accordance with the following table:
Digital signal
5-6
with two transits.
the four inputs relate to a common internal mass for grounding. Terminals 56, 66, 76 and
86 (if used) should therefore lead to a central neutral point in the system.
Terminal symbol
I+ I+
I- ⊥
Terminal symbol
+ DI
- ⊥
In 1 In 2
55 65
56 66
In 1 In 2
57 67
56 66
SITRANS DA400 with protection against explosion
Operating Instructions, 02/2006, A5E00684661-01
In 3 In 4
75 85
76 86
In 3 In 4
77 87
76 86