The VM24 external I/O modules act as an interface for the general-purpose programmable inputs and outputs of all the 6000 Series servo and microstepping products. The VM24 module consists of a base board and one to three SIM (single in-line module) style boards that can be inserted to provide the user with a scaleable solution for their input and output needs.
•The outputs are enhanced by an undervoltage lockout circuit and a thermal shutdown protection circuit. These outputs operate over 5VDC to 24VDC, will sink 50 mA to 0.4VDC or 300mA to 2.5VDC, and will source 50 mA to a voltage level of Vo – 2VDC (user-supplied voltage level Vo minus 2 volts, e.g. for Vo=24V, output is 22V) or 300 mA to a voltage level of Vo – 2.5VDC (user-supplied voltage level Vo minus 2.5 volts, e.g. for Vo=24V, output is 21.5V).
•The inputs are enhanced by decompression, hysteresis, high-frequency filtering, and overvoltage clamping. These inputs, capable of operating in sinking or sourcing mode, have a range from 5VDC to 24VDC. The
switching level for inputs is based on the user-supplied voltage Vi, such that OFF ≤1/3 (Vi) and ON ≥ 2/3 (Vi), with hysteresis of 1/3(Vi). (For example, with Vi of 24VDC, OFF ≤ 8VDC and ON ≥ 16VDC, with 8VDC of hysteresis.) Jumpers are used to configure the inputs as sinking or sourcing. Each of the three SIM sockets has its own corresponding jumper, allowing each input SIM to be independently configured.
The VM24 module accepts a 50-pin ribbon cable from the 6000 Series product and provides screw terminal connections for easier interface with the user's application. The 24 I/O signals to/from the 50-pin DIN connector and the 50-pin screw terminal are interrupted by three SIM sockets (each SIM interrupts an 8-bit group of signals).
Optical isolation is inherited from the 6000 product, except for OEM products. (I/O ground is isolated from microprocessor ground, but inputs and outputs are not isolated from each other.)
