TD350 Series VFD Extension cards
-301-
Indicator definition
PWR power
indicator (green)
The indicator is on when the expansion card is
powered on.
COMM
communication
indicator (green)
This indicator is on when the expansion card is
establishing a connection with the control board;
it blinks periodically after the expansion card is
properly connected to the control board (the period is
1s, on for 0.5s, and off for the other 0.5s);
and it is off when the expansion card is disconnected
from the control board.
ERR fault indicator
(red)
Blinks: an error occurs (the period is 1s, on for 0.5s,
and off for the other 0.5s), and the error type can be
queries through the upper computer Auto Station;
Off: no fault.
PWR power
indicator (green)
The indicator is on when the expansion card is
powered on.
RUN status
indicator (green)
On: PLC program is running
Off: PLC program stops
The EC-PC502-00 programmable expansion card can replace some micro PLC applications. It
adopts the global mainstream development environment PLC, supporting the instruction language
(IL), ladder diagram (LD), and sequential function chart (SFC). It provides a user program storage
space of 16K steps and data storage space of 8K words, and supports saving data of 1K words at
power failure, which facilitate customers' secondary development and meets the customization
requirements.
The EC-PC502-00 programmable expansion card provides 6 digital inputs, 2 relay outputs, 1 analog
input, 1 analog output, 1 RS485 communication channel (supports master/slave switchover). It is
user-friendly, providing relay outputs through European-type screw terminals and other inputs and
outputs through spring terminals.
EC-PC502-00 terminal function description
To provide input digital working power from
external to internal.
Voltage range: 12–24V
PW and +24V are short connected by
default.
Internal output power supply, 100mA
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