G&L MMC-A2, Hardware Manual

Page: 97 / 192

Standalone MMC Control
G & L Motion Control Inc. MMC Hardware Manual 89
Axis Port & Aux Port Encoder Input
Input channels 3 or 5
Input receiver 26C32 differential RS422 receiver
Recommended Encoder Drivers 7272, 75183, 8830, 75114, 9614, 26LS31 (or equivalent)
Encoder signals Differential quadrature
Input threshold ±750 mV
Input termination 120 ohm, provided on board
Maximum input voltage 5 V
Maximum A or B input frequency 250 K Hz (1 M feedback unit count rate)
Fast input voltage Nominal 24 VDC, maximum 30 VDC
Guaranteed on voltage 15 VDC
Guaranteed off voltage 5 VDC
Turn on/off time 1 ms
Axis Port, Aux Port, and Gen I/O Port DC Inputs
Configuration The general inputs are divided into two groups of eight. Each group
can be configured for sourcing or sinking. The auxiliary inputs are
divided into two groups of six inputs. Each group can be configured
for sourcing or sinking. The axis inputs have one input per axis.
Each input can be configured for sourcing or sinking.
Operates with IEC Type 1 inputs (per IEC 1131=2).
Input voltage Nominal 24 VDC, maximum 30 VDC
Guaranteed on voltage 15 VDC
Guaranteed off voltage 5 VDC
Turn on/off time 1 ms
Fast inputs 50
μ
sec
Gen I/O Port DC Outputs
Number of outputs 16 outputs
Input voltage Nominal 24 VDC, 30 VDC maximum
Configuration Two groups of eight solid-state switches.
Protection of logic circuits Optical isolation between the logic and field side, transient
suppression on the 24V external supply
Maximum current .25 A per output
Voltage range 24 VDC nominal, 5 to 30 VDC
Switch characteristics Solid-state switches
Time delay on for resistive loads 50 µsec max
Time delay off for resistive loads 50 µsec max
Leakage current in off state 0.5 mA max
Switch voltage, maximum ON 1 VDC max
Short circuit protection for each group 15 A (max) pulses for about 130 µsec every 100 msec until short is
removed
Scan loss response Outputs turn off