GFK-1504K
Chapter 7 Discrete Input Modules
7-49
7
IC200MDL644
Input Module, 5/12VDC Pos/Neg Logic Grouped 32 Point
Discrete input module IC200MDL644 provides four groups of 8 discrete inputs.
Inputs in each group can be either positive logic inputs that receive current from
input devices and return the current on the common, or negative-logic inputs that
receive current from the common and return current to the input device. Input
devices are connected between the input terminals and common terminals. The
module supports positive and negative logic inputs. For the inputs to be compatible
with TTL devices, the negative logic configuration should be used.
1234567 831
OK
OK
IC200MDL644
1
2
3
4
5
6
7
8
9
10
11 12 13
14 15 16
I
I
17
18 19
20 21 22 23 24 25 26
27 28 29
30 31 32
INPUT 5/12VDC
POS/NEG GRP 32PT
IND CONT EQ FOR HAZ LOC
CLASS I DIV 2 GROUPS ABCD
Teno Code T4A Ambient 60C
CLASS I ZONE 2 GROUP IIC T4
Ex nA IIC T4 OC
≤
Ta
≤
60C
Ex nV II T4 Demko No 98Y.125014
Power for module operation comes from the backplane.
Intelligent processing for this module is performed by the CPU or NIU. The module
provides 32 bits of discrete input data.
LED Indicators
Individual green LEDs indicate the on/off state of each input point. Backplane
power must be present for LEDs to provide status of inputs.
The green OK LED is on when backplane power is present to the module.
Configuration Parameters
The module’s basic input on/off response time is 0.25ms.
For some applications, it may be preferable to add additional filtering to compensate
for conditions such as noise spikes or switch bounce. Input filter times of 0ms,
1.0ms, or 7.0ms are selectable via software configuration, for total response times of
0.25ms, 1.25ms, and 7.25ms respectively. The default is 1.0ms filter time (total
response time is 1.25ms).
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