MC404-Z
Document Version: 1.05
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10
Amplifier enable (Watchdog) relay output
An internal solid-state relay contact is available to enable external drives when the
controller has powered up correctly and the system and application software are ready. The
amplifier enable relay has
an ON resistance of 25Ω at 100mA.
The enable relay will be open
circuit if there is no power on the controller OR a motion error exists on an axis OR the user
program sets it open with the WDOG = OFF command.
The amplifier enable relay may, for example, be incorporated within a hold-up circuit or
safety relay circuit that must be intact before torque is applied to motor windings.
Analogue I/O
The 15-way auxiliary connector includes a single built-in 12 bit analogue input with a scale
of 0 to 10V. A 10 bit, 0 to 10V analogue output is also provided for general use. For
example, to send a control voltage to an open-loop inverter drive.
Axis ports
The MC404-Z is designed to support pulse driven motor drives on the
standard controller hardware. All 4 axes are available as standard and no
additional axis feature enable codes are required. In addition, axis 3 can
be configured as an encoder input for systems that need a master
encoder reference.
Each of the axes (0-3) may be enabled as pulse+direction or quadrature
AB output according to the
user’s requirements by setting the axis ATYPE
parameter.
Axis 3 only
can be set as either pulse output, encoder
output or encoder input.
The function of the 9-
pin ‘D’ connectors will be dependent on the
specific axis configuration which has been defined. If the axis is
configured as a pulse output, the connector provides differential outputs
(RS422) for step+direction or simulated encoder, and enable signals. If
axis 3 is set as encoder input, there is an input for the Z channel as well
as A and B. The Z can be used for position registration capture.
The 9-way socket for axis 3 provides a current-limited 5V output capable of powering most
encoders. This simplifies wiring and reduces the need for external power supplies.
