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Epsilon Eb Digital Servo Drive Installation Manual
Encoder Output Signal
Differential line driver, RS-422 and TTL compatible
Scalable in one line increment resolution up to 2048 lines/rev of the motor (MG and NT)
Output Device = AM26C31
20 mA per channel, sink and/or source
V
out Hi
@ 20 mA = 3.8 - 4.5 V
V
out Lo
@ 20 mA = 0.2 - 0.4 V
V
out diff
w/100 ohm termination = 2.0 - 3.1 V
V
out common mode
w/100 ohm termination = 0.0 - 3.0 V
I
out short circuit
= 30 - 130 mA
Shunt Resistor Capacity/
Regeneration Capacity
Internal: At full speed, use full torque decel and 5:1 inertial load for Eb 202/203 with NT-
212 or Eb-205 with MG-340. Repetition frequency limited only by drive RMS capacity. No
internal shunt resistor.
External: Bus connection provided for external regeneration unit (EMC model RSR-2 with a
20 ohms resistor) 15 ARMS capacity.
Fault Detection Capability
Low DC bus (can be disabled)
High DC bus
Power Stage fault
Logic power
Encoder state
Encoder line break
Drive overtemperature
Motor over temperature
Overspeed
Travel limit (+)
Travel limit (-)
Pulse mode position error
Watchdog timer
Power-up self test failure
Non-volatile memory invalid
Cooling Method
Eb-202, Eb-203, Eb-205: Convection
Environmental
Ambient temperature range for rated output: 32° F to 104° F (O° C to 40° C)
Maximum ambient operating temperature: 104° F to 122° F (40° C to 50° C) with power
derating of 3%/°C
Rated altitude: 3,280 feet (1000 m)
Vibration: 10 - 2000 Hz at 2g
Humidity requirement: 10 - 95% non-condensing
Storage temperature: -13 °F to 167 °F (-25 °C to 75 °C)
Derating
Temperature:
Operation in ambient temperature over 50° C (122° F) not recommended.
Drive output power must be derated by 3 %/°C between 104° F to 122° F (40° C to 50° C)
Derating altitude: Above 3,280.8 ft (1000 m) reduce output by 1% per 328.08 ft (100 m)
Standards and Agency Approvals
UL listed
Canadian UL listed
CE Mark: Low voltage directive; EMC directive
Epsilon Series