MTS FlexTest Models 200 - Manual (Page 184)

MTS FlexTest® Models 40/60/100/200 Controller Hardware
Model 494.47 Dual UART/Encoder Interface Card
Mezzanine Cards 184
Specifications–Model 494.47 Dual UART/Encoder Card
SSI duty-cycle settings
Older versions of the Model 494.47 and Model 494.49 cards used a fixed
25% low/75% high duty cycle for the SSI clock. To support other types of
SSI encoders, newer versions of these cards will set the duty cycle based on
the SSI baud rate setting. With the new design:
• SSI baud rates less than or equal to 115.74 kHz = 50/50 duty cycle.
• SSI baud rates greater than 115.74 kHz = 25/75 duty cycle.
The revisions listed in the following table include the SSI duty-cycle
changes described above. Cards that have the programmable-logic-device
revision listed in the table will support the 50/50 duty cycle.
P ARAMETER S PECIFICATION
Encoder Interface RS-485
UART Electrical Interface RS-485 (2 or 4 wire)
UART Baud Rate 300 to 57600 Baud (software configurable)
Power Out
(to device) 15 V DC, Poly fused at 200 mA (continuous
current) and 400 mA (trip current)
Supported Encoder/Digital
Transducer Interfaces You can use system hardware-mapping
software to select the type of interface:
SSI (Temposonics R)
Gurley (Teledyne)
Incremental/Velocity (includes counter selection)
PWM (Temposonics G)
E NCODER C ARD P ROGRAMMABLE L OGIC D EVICE R EVISION
Model 494.47 H or higher
Model 494.49 C or higher