Encoder Information - FSMS/VSMS
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There are multiple encoder options that can be used with ETC Rigging 3rd Party Controls.
Fixed Speed Motor Starter (FSMS):
- TTL Encoder (Differential Signal, preferred)
- 5-30 VDC Supply
- 5V Signal
- HTL or Line Driver Encoder (Single Ended Signal)
- 5-30 VDC Supply
- If encoder cannot run at 5 VDC an HTL -> TTL Conversion Card is required
- HTL or Line Driver Encoder (Differential Signal)
- 5-30 VDC Supply
- If encoder cannot run at 5 VDC an HTL -> TTL Conversion Card is required, does not use differential signals
- Quadrature Encoder (Single Ended Signal, preferred)
- 5 VDC Supply
- 5V Signal
- 10k Analog Pot
- Not recommended
Variable Speed Motor Starter (VSMS):
- TTL Encoder (Differential Signal, preferred)
- 5-30 VDC Supply
- 5V Signal
- HTL or Line Driver Encoder (Single Ended Signal)
- 5-30 VDC Supply
- If encoder cannot run at 5 VDC an HTL -> TTL Conversion Card is required
- HTL or Line Driver Encoder (Differential Signal)
- 5-30 VDC Supply
- If encoder cannot run at 5 VDC an HTL -> TTL Conversion Card is required, does not use differential signals
- 10k Analog Pot
- For use with SoftLift Fixed Speed Control Only, not reccommended.
Note: A motor encoder is required for full variable speed control, without a motor encoder a VSMS can only run a hoist in SoftLift (fixed speed).
Motor Control Interface (MCI):
- TTL Encoder (Differential Signal, preferred)
- 5-30 VDC Supply
- 5V Signal
- HTL or Line Driver Encoder (Single Ended Signal)
- 5-30 VDC Supply
- If encoder cannot run at 5 VDC an HTL -> TTL Conversion Card is required
- HTL or Line Driver Encoder (Differential Signal)
- 5-30 VDC Supply
- If encoder cannot run at 5 VDC an HTL -> TTL Conversion Card is required, does not use differential signals
- 10k Analog Pot
- Not reccommended
- Note: A motor or dum encoder is required when the 0-10V analog speed control on MCI is being used in a (non-overhead lifting) variable speed application (ie curtain machines, etc.).
ETC recommends using an encoder with a minimum resolution of 1024 pulses/rotation.
ETC recommends using Belden 9728 or equivalent for encoder field wiring.
| Encoder Type | Signal Level | Supply Voltage | Signal Output Voltage |
| TTL | High | 4.75 - 30 VDC | 3V Min (5V Max) |
| Low | 4.75 - 30 VDC | 0.5V Max | |
| HTL* | High | 4.75 - 9 VDC | 3V Min |
| High | 9 - 30 VDC | Supply Voltage - 3V (Min) | |
| Low | 4.75 - 30 VDC | 0.5V Max |
*Requires an HTL -> TTL Conversion Card