See Input Management for important information on managing inputs.
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FIRE HAZARD |
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Use only the correct wire sizes for the current capacity of the power supplies. |
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Failure to follow these instructions will result in death or serious injury. |
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UNINTENDED EQUIPMENT OPERATION |
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Do not exceed any of the rated values specified in the environmental and electrical characteristics tables. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
Input Management Functions Availability
An input is either not configured as a function (regular input) or used for RUN/STOP, for events, by HSC, PTO, PWM, or FG functions.
The table below shows the possible usage of the TM218LDA16DRN controller inputs:
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Function |
Input function |
HSC/PTO/PWM/FG |
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|---|---|---|---|---|---|
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None |
RUN/STOP |
Latch |
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Filter type |
Integrator |
Integrator |
Bounce |
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Fast Input1 |
I0 |
X |
X |
– |
HSC |
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I1 |
X |
X |
– |
HSC |
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Digital Input |
I2 |
X |
X |
– |
– |
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I3 |
X |
X |
– |
– |
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I4 |
X |
X |
– |
– |
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I5 |
X |
X |
– |
– |
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I6 |
X |
X |
– |
– |
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I7 |
X |
X |
– |
– |
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I8 |
X |
X |
– |
– |
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X Yes – No 1 Can also be used as a regular input |
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You can use filters and functions to manage the controller inputs.
The table below describes the characteristics of the Modicon M218 Logic Controller digital inputs:
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Characteristic |
Value |
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|---|---|---|---|
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Rated current |
7 mA |
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Inrush values |
Voltage |
30 Vdc |
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Current |
9 mA |
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Input impedance |
3.3 kΩ |
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Input type |
Sink/Source |
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Rated voltage |
24 Vdc |
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Input range |
0...28.8 Vdc |
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Input limit values |
Voltage at state 1 |
> 15 Vdc (15...28.8 Vdc) |
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Voltage at state 0 |
< 5 Vdc (0...5 Vdc) |
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Current at state 1 |
> 2.5 mA |
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Current at state 0 |
< 1.0 mA |
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Isolation (photo coupler) |
Between channels |
None |
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Between channels and internal logic |
500 Vdc |
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Filtering |
Default: 3 ms Selectable: No filter (1 ms), 3 ms and 12 ms |
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IEC61131-2 edition 3 type |
Type 1 |
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Compatibility |
Supports 2 wire and 3 wire sensors(1) |
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Cable type and length |
Shielded: Maximum 100 m (328 ft) Non-shielded: 50 m (164 ft) Use shielded cables for Fast inputs. |
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Protection against over voltage |
No |
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Terminal blocks |
Type: Screw, 7.62 mm (0.29 in.) pitch 2 rows are removable |
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1 Best engineering practices usually require a single wire connected to each terminal, or two wires if an appropriate cable end is used. Connection of more than two wires may require the application of external terminal blocks (verify local codes and regulations that may apply). |
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The following illustration describes the wiring diagram of the M218 controller’s digital inputs:
(1) 0.6 A Type T fuse
(a) Sink inputs (positive logic)
(b) Source inputs (negative logic)
NC Not Connected (N.C.)
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UNINTENDED EQUIPMENT OPERATION |
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Do not connect wires to unused terminals and/or terminals indicated as “No Connection (N.C.)”. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
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UNINTENDED EQUIPMENT OPERATION |
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Use the sensor and actuator power supply only for supplying power to sensors or actuators connected to the controller. |
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Failure to follow these instructions can result in death, serious injury, or equipment damage. |
