Msi-Em-Io84 Input/Output Expansion Module; Description; Display Elements And Terminal Assignment - Leuze electronic MSI 400 Operating Instructions Manual

3.8

MSI-EM-IO84 input/output expansion module

3.8.1

Description

The MSI-EM-IO84 module is an input/output expansion with eight safe inputs and four safe outputs. It has
two test signal generators: one for test output X1 and one for test output X2.
The MSI-EM-IO84 module offers the following functions:
• Monitoring of connected safety devices
For further information: Connecting devices [chapter 4]
• Forwarding of input information to the controller module
• Receipt of control signals from the controller module and corresponding switching of outputs
• Fast shut-off: Direct switch-off of the actuators connected on the module. This results in a significant re-
duction in the response time of the entire system. Only 8 ms are needed in the response times of the
devices at the inputs and outputs in order to switch-off the outputs. The runtimes on the internal safety
bus and the Logic Execution Time do not play any role in this case.
Further information: System response times [chapter 12.1]
• Activating or deactivating test pulses at the outputs (Q1–Q4) with firmware version V2.00.0 and higher.
The MSI-EM-IO84 module cannot be operated alone; it always requires an MSI 4xx controller module (see
"MSI.designer" programming software).
It is possible to use multiple MSI-EM-IO84 modules simultaneously (see System setup [chapter 3.2]). The
voltage of the internal logic and the test outputs is supplied via the system connector and the internal safety
bus. The voltage of the Q1–Q4 outputs of the MSI-EM-IO84 must be supplied directly via A1/A2 at the re-
spective module.
Limited short-circuit detection in the input circuits
Ä One MSI-EM-IO84 module has two test signal generators, X1 and X2.
Ä Short-circuits between test signal generators of a MSI-EM-I8 or MSI-EM-IO84 module are
detected. Between different modules the short circuit detection is then only ensured if the
test gaps of the test signal generators are < 4 ms and the test periods ≥ 200 ms. Short-cir-
cuits past 24 V DC (after High) at inputs that are connected to test outputs are detected in-
dependently of the length of the test gaps.
Take note of this during wiring (e.g. by using separate routing or protected lines)!
NOTICE
Ä The LEDs of inputs I1 to I8 indicate the state of the inputs at an update interval of about 64
i
ms.
3.8.2

Display elements and terminal assignment

MS LED
Fig. 3.9: Display elements of the MSI-EM-IO84 module
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WARNING
8 input LEDs
4 output LEDs
MSI 400
Product description
27