2
Table 2-2 I/O extension module insulation specifications
Name
Test condition
User output (relay)
to extension bus
Capable of standing one minute of 2830Vac
(50Hz) or RMS current with no breakdown or
flashover. Leakage current ≤5mA
User input to user
output (relay)
Capable of standing one minute of 2830Vac
(50Hz) or RMS current with no breakdown or
flashover. Leakage current ≤5mA
User input terminal
and extension bus
Designed by following the SELV circuit
requirements
Table 2-3 I/O extension module power requirement
Model
5Vdc/GND
24Vdc/GND
24Vdc/COM
MC100-0800ENN
85mA
0
50mA
MC100-0808ERN
70mA
50mA
50mA
MC100-0808ETN
170mA
0
50mA
MC100-0008ERN
70mA
50mA
0
MC100-0008ETN
170mA
0
0
Note:
1. 5Vdc/GND: working power for logic circuit of extension module,
provided by the extension bus
2. 24Vdc/COM: input state detection power, through S/S terminal
3. 24Vdc/GND: working power for relay circuit of extension module,
provided by the extension bus
Before connecting the extension module to the basic module,
calculate the total current of all extension module circuits.
Make sure that the currents are smaller than the capacity of
the corresponding power supply at the basic module to avoid
overloading the basic module.
3 Input Features
3.1 Internal Equivalent Input Circuit
The extension module needs external power supply (+24Vdc)
for detecting user switch status. The internal equivalent
resistance of the input circuit is about 4.3kΩ, and
bi-directional photo coupler is used for signal detection. You
can use either sink mode or source mode, so long as dry
contact digital signal is input. To connect to the output of
active transistor sensor, you need to use the open collector
output mode. The wiring of I/O extension module internal
equivalent power and inputs is the same as those of the basic
module, as shown in Figure 3-1.
24V/5V/GND
Logic circuit work power
from extension cable
Lo
gi
c
pr
oc
es
si
ng
c
irc
ui
t
Extension module internal
equivalent circuit
Sensor
To basic module
+24V
To basic module
COM
In
pu
t d
ev
ic
es
S/S
X0
X1
X2
Xn
External wiring
Figure 3-1 Internal equivalent input circuit
3.2 I/O Signal State Indicator
The input status indicator displays the status of input terminal.
The indicator turns on when the input is in the ON state.
Otherwise, the indicator is off.
The output status indicator displays the status of output
terminal. The indicator turns on when the output is in the ON
state (Yn is connected with COMn). Otherwise, the indicator
is off. See Figure 3-2.
Power indicator
Input status indicator
Output status indicator
Figure 3-2 Status indicator
4 Output Features
4.1 Relay Output Electric Specifications
Table 4-1 Relay output terminal electric specifications
Item
Relay output terminal
External power
Below 250Vac, 30Vdc
Circuit isolation
By relay
Operation indication
Relay output contacts closed, LED on
Leakage current of open
circuit
-
Min. load
2mA/5Vdc
Max.
output
current
Resistive load
2A/1 point, total current of 8 points
(sharing one COM) < 8A
Inductive load 220Vac, 80VA
Illumination
220Vac, 100W
Response
time
OFF
→
ON
Max.: 20ms
ON
→
OFF
Max.: 20ms
4.2 Transistor Output Electric Specifications
Table 4-2 Transistor output electric specifications
Item
Transistor output terminal
External power
5 ~ 24Vdc
Circuit isolation
Photo coupler
Operation indication
LED is on when photo coupler is driven
Leakage current of open
circuit
< 0.1mA/30Vdc
Min. load
5mA (5 ~ 24Vdc)
Max.
output
current
Resistive load
3A/1 point
8A/4 points
1.6A/8 points
Above 8 points, total current increases
0.1A at each point increase
Inductive load
24Vdc, 7.2W
Illumination
24Vdc, 1.5W
Respon
se time
OFF
→
ON
Max. 0.5ms (100mA/24Vdc)
ON
→
OFF
Max. 0.5ms (100mA/24Vdc)
