4 Start-Up
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HI 800 177 E Rev. 1.01
4.1.2
Surges on Digital Inputs
Due to the short cycle time of the HIMatrix systems, a surge pulse as described in
EN 61000-4-5 can be read in to the digital inputs as a short-term high level.
The following measures ensure proper operation in environments where surges may occur:
1. Install shielded input wires
2. Activate noise blanking: a signal must be present for at least two cycles before it is
evaluated.
i
Activating noise blanking increases the response time of the HIMatrix system!
i
The measures specified above are not necessary if the plant design precludes surges from
occurring within the system.
In particular, the design must include protective measures with respect to overvoltage,
lightning, earth grounding and plant wiring in accordance with the relevant standards and
the instructions specified in the System Manual (HI 800 141 or HI 800 191).
4.1.3 Installation
and
Terminals of the Digital Inputs
Use the following terminals to connect the digital outputs:
Terminal
Designation
Function (outputs)
1...4
S+
Positive sensor supply
5...8
S-
Negative sensot supply
Terminal
Designation
Function (outputs)
9
1-
Digital output 1, S+ switching
10
1+
Digital output 1, S- switching
11
2-
Digital output 2, S+ switching
12
2+
Digital output 2, S- switching
13
3-
Digital output 3, S+ switching
14
3+
Digital output 3, S- switching
15
4-
Digital output 4, S+ switching
16
4+
Digital output 4, S- switching
Terminal
Designation
Function (outputs)
17
5-
Digital output 5, S+ switching
18
5+
Digital output 5, S- switching
19
6-
Digital output 6, S+ switching
20
6+
Digital output 6, S- switching
21
7-
Digital output 7, S+ switching
22
7+
Digital output 7, S- switching
23
8-
Digital output 8, S+ switching
24
8+
Digital output 8, S- switching
Table 18: Terminal Assignment for the Digital Outputs
The digitial outputs can be configured in three ways:
Digital output, one-pole switching without line diagnosis
Digital output, two-pole switching without line diagnosis
Digital output, two-pole switching with line diagnosis
Line diagnosis means line monitoring of digital outputs for short-circuits and open-circuits.