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Curtis 1298 Manual, OS 11
2 — INSTALLATION & WIRING: I/O Signal Specifications
Communications ports
Separate CAN and serial ports provide complete communications and program-
ming capability for all user available controller information.
The Curtis 1311 handheld programmer plugs into a connector wired to
pins 28 and 29, along with ground (pin 7) and the +12V power supply (pin
25); see wiring diagram, Figure 3. The Curtis Model 840 display can plug into
the same 4-pin connector.
Wiring the CAN Term H and CAN Term L pins together provides a local
CAN termination of 120
Ω, 0.5 W; keep the length of these wires short. CAN
Term H and CAN Term L should never be connected to any external wiring.
COMMUNICATIONS PORT SPECIFICATIONS
SUPPORTED
PROTECTED ESD
SIGNAL NAME PIN PROTOCOL/DEVICES
DATA RATE VOLTAGE TOLERANCE
CANH 23 CANopen, up to 500 kbps -5 V to ± 8 kV (air
CANL 35 NODES 2.0, (MaxV + 10 V) discharge)
other 11-bit with < 30 V
identifier field differentially
CAN protocols
CAN Term H 21
(no connection ± 8 kV (air
CAN Term L 34
to external wiring)
discharge)
Serial TX 28
Curtis 840 Display, as required, -0.3 to 12 V ± 8 kV (air
Serial RX 29 1311 Handheld 9.6 to 56 kbps discharge)
Programmer,
1314 PC Program-
ming Station
Encoder inputs
Two control lines are internally configured to read a quadrature type position
encoder. The encoder is typically powered from the 5V supply (pin 26) or 12V
supply (pin 25), but can be powered from any external supply (from 5 V up
to B+) as long as the logic threshold requirements are met.
ENCODER INPUT SPECIFICATIONS
LOGIC
INPUT MAX PROTECTED ESD
SIGNAL NAME PIN THRESHOLDS
IMPEDANCE FREQ. VOLTAGE TOLERANCE
Encoder A 31 Rising edge= 720 Ω 10 kHz - 5 V to ± 8 kV (air
Encoder B 32 2.8 V max (internal (MaxV + 10 V) discharge)
Falling edge= pull-up with < 15 V
2.2 V min to +4V) differentially
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