1
OVERVIEW
1.1 Features
1 - 1
1
OVERVIEW
2
SYSTEM
CONFIGURATION
3
SPECIFICATIONS
4
SETUP AND
PROCEDURES
BEFORE OPERATION
5
UTILITY PACKAGE
(GX CONFIGURATOR-
AD)
6
PROGRAMMING
7
ONLINE MODULE
CHANGE
8
TROUBLESHOOTING
1 OVERVIEW
This User's Manual describes the specifications, handling and programming methods for
the type Q68AD-G channel isolated analog-digital converter module (hereinafter referred
to as the Q68AD-G) and type Q66AD-DG channel isolated analog-digital converter
module (with signal conditioning function) (hereinafter referred to as the Q66AD-DG),
which are used with the MELSEC-Q series CPU modules.
The Q66AD-DG is exclusively used for current input.
In this manual, the Q68AD-G and Q66AD-DG are collectively referred to as the A/D
converter modules.
1.1 Features
(1) Channel isolated
The channels are isolated.
The Q66AD-DG is also isolated between the external power supply and channels.
(2) Multi-channel analog input is available.
(a) By using a single Q68AD-G, analog voltage or current inputs of 8 channels are
available.
(b) A single Q66AD-DG allows connection of 2-wire transmitters of 6 channels.
It has an input range for analog current, in addition to connections to 2-wire
transmitters.
(3) Power supply to 2-wire transmitter (Q66AD-DG only)
Supplying power to the 2-wire transmitter, the Q66AD-DG does not require the power
supply for the 2-wire transmitter.
Supply power can be switched ON/OFF channel-by-channel by the A/D conversion
enable/disable setting.
(4) Module protection provided by short-circuit protection circuit
(Q66AD-DG only)
If an excessive current flows into the module due to a short circuit of the wiring, the
short-circuit protection circuit limits the current to within 25 to 35mA, protecting the
module.
(5) Analog input check by check terminals (Q66AD-DG only)
Measurement of a voltage at the check terminals allows the mA of the 2-wire
transmitter output to be checked without the wiring being disconnected.
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