GFK-1504K
Chapter 9 Discrete Mixed Modules
9-21
9
IC200MDD845
Mixed Module, Output Relay 2.0A Isolated 8 Points
/ Input 24VDC Pos/Neg Logic Grouped 16 Points
Discrete input/output module IC200MDD845 provides 8 individually-isolated Form A
relay outputs and two groups of 8 discrete inputs. An output contact is closed when the
host CPU is active and the corresponding output logic bit is “1”. 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.
1234567 831
IND CONT EQ FOR HAZ LOC
CLASS I DIV 2 GROUPS ABCD
Ambient 60C
CLASS I ZONE 2 GROUP IIC
Ex nA IIC 0C
≤
To
≤
60C
Ex nV II Demko No. 98Y.125014
IC200MDD845
OUT RLY 2A ISO 8PT
IN 24DC POS/NEG 16PT
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10 11 12 13
14 15 16
OK
Q
I
OK
Note: Negative-logic functionality requires module version IC200MDD845C or higher.
Power for module operation comes from the backplane. Loads must be powered by an
external source.
Intelligent processing for this module is performed by the CPU or NIU. The module
provides 16 bits of discrete input data and receives 8 bits of discrete output data.
LED Indicators
Individual green LEDs indicate the On/Off states of the output points and input points.
Operation of the output LEDs is logic driven and independent of the load conditions.
The green OK LEDs are on when backplane power is present to the module.
Configuration Parameters
The module’s basic input on/off response time is 0.5ms.
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 0.5ms, 1.5ms,
and 7.5ms respectively. The default is 1.0ms filter time (total response time is 1.5ms).
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