8. Peripherals and Options
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Extension Mini I/O Card (MD38IO2)
MD38IO2 is simplied version of MD38IO1 and provides three DI terminals.
DI6 DI7 DI8
J2
COM OP2 +24V
CN
1
CN2
Table 8-3 Terminal descriptions of the MD38IO2
Type Terminal Terminal Name Function Description
Power
supply
+24V-COM External +24V
power supply
Provide +24 V power supply to an external unit.
Generally used to supply DI/DO terminals and
external sensors.
Max. output current: 170 mA
OP2 Digital input
power terminal
It is not connected to power supply by default.
It can be connected either to external power or
+24V according to the actual need.
Digital
inputs
DI6-OP2 Digital input 6 Optically-coupled isolation compatible with dual-
polarity inputs
Input resistance: 3.3 kΩ for DI6 and DI7, 2.4 kΩ
for DI8
Voltage range for inputs: 9 to 30 V
DI6, DI7 and DI8 are common input terminals
with input frequency < 100 Hz.
DI7-OP2 Digital input 7
DI8-OP2 Digital input 8
Table 8-4 Jumper descriptions of the MD38IO2
Jumper Description Meaning Setting
J2 OP2 connecting mode
selection
If DI connected in SINK mode, OP2
connected to +24V
If DI connected in SOURCE mode,
OP2 connected to COM
Setting of jumpers takes top view with main terminals at the bottom of the
card as visual angle. Jumpers are silk-screened on the card.
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