The terminal definition of MCCD-1212BMD1/2/3/4
High-speed input port 0～1，input common
terminal
Switch input terminal 02～13，
input common
terminal
High-speed output port 0 ～2，output
common terminal 0
The channel of switch output3 ～7，output
common terminal 1
The channel of switch output10～13，output
common terminal 2
VI1+,VIO1-,IO1+,VI2+,
VIO2-,IO2+
The channel of analog output1 ～2
（Compatible with voltage and current)
The channel of analog output 1 and
2(voltage or current)
PT100 input channel 1 and channel 2
L1+,L1-,L2+,L2-,L3+,
L3-,L4+,L4-
TC input channel 1,channel 2,channel 3 and
channel 4
USB flash drive interface for program
upgrade
USB interface for program debugging and
downloading
The terminal definition of MCCD-1616BMD1/2/3/4
High-speed input port 0～1，
input
common terminal
Switch input terminal 02 ～17 ，
input common terminal
The channel of high-speed
output 0 ～2，output common
terminal
The channel of switch output3～
7，output common terminal 1
The channel of switch output10～
17，output common terminal 2
VI1+,VIO1-,IO1+,VI2+,VIO2-,IO2+
The channel of analog output1～
2（Compatible with voltage and
current)
The channel of analog output 1
and 2(voltage or current)
PT100 input channel 1 and
channel 2
L1+,L1-,L2+,L2-,L3+,L3-,L4+,L4-
TC input channel 1,channel
2,channel 3 and channel 4
USB flash drive interface for
program upgrade
USB interface for program
debugging and downloading
Modbus (master
and slave station)
free port
Modbus (master
and slave station)
Note: 1. Communication port 2 is HMI resource, which needs to be set
in MEGVIEW2 for use. Modbus slave station is the default.
Communication port 4, 5 and 6 are HMI resources, which need to be
set in MEGVIEW2 for use
6. Switching characteristics of input and output
6.1 Switching input characteristics and signal
specifications
The counter input port has a maximum frequency limit. If the limit is
exceeded, the count may be inaccurate or the system may not function
properly. Please arrange the input port reasonably and select the
appropriate external sensor.
The PLC provides port "S/S" for selecting whether the input signal is
source input or leak input.
6.1.1 Transistor input specifications
