Curtis 1238SE - Throttle and Brake Inputs

2 — INSTALLATION AND WIRING
pg. 17
Return to TOC Curtis 1232E/34E/36E/38E & 1232SE/34SE/36SE/38SE Manual, os 31 – May 2017
Throttle and Brake Inputs
e two pot inputs are independently programmable to allow use of a voltage throttle or a 2-wire or
3-wire resistance throttle. Voltage throttles require only the Pot Wiper input (with I/O Ground for
the return line). Resistance throttles require Pot Wiper and Pot Low (2-wire) or Pot High, Pot Wiper,
and Pot Low (3-wire). All throttle I/O is protected against shorts to B+ or B−.
Alternatively, these two inputs can be used for analog signals other than the throttle and brake pot
inputs. Conguring the inputs for use with other signals requires VCL programming; see Chapter 10.
THROTTLE INPUT SPECIFICATIONS
Signal Name Pin
Operating
Voltage
Input
Impedance
S/Sink
Current
Protected
Voltage
ESD
Tolerance
Throttle Pot High 15
0 V (shorted to
Pot Low) 5 V
(open circuit)
N/A
1 mA nominal
(source)
–0.5 V to
(MaxV + 10 V)
± 8 kV
(direct
strike)
Pot2 High 27
Throttle Pot Wiper 16
0 to 6.25 V 100 kΩ min
0.76 mA nominal
(source, 2-wire)
Pot2 Wiper 17
Pot Low 18 0 to 0.25 V 20 Ω nom.
Faults if above 15 mA
(sink)
–1 V to
(MaxV + 10 V)
Communications Ports
Separate CAN and serial ports provide complete communications and programming capability for
all user available controller information.
e Curtis 1313 handheld programmer and 1314 PC programmer’s 1309-serial-interface-device
plug into a connector* wired to pins 28 and 29, along with ground (pin 7) and the +12 V power
supply (pin 25); see wiring diagram, Figure 3. e Curtis “Spy” Model 840 display will connect the
the serial-port pins as shown in Figure 3.
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
Signal Name Pin
Supported
Protocol / Devices
Data Range Protected Voltage ESD Tolerance
CAN H 23
CANopen, other 11-bit or 29-
bit identier protocols
up to 1 Mbit/s
–0.5 V to
(MaxV + 10 V)
± 8 kV
(direct strike)
CAN L 35
CAN Term H 21
(no connection to
external wiring)
CAN Term L 34
Serial TX 28
Curtis 840 Display,
1313 Handhelp Programmer,
1314 PC Programming Station
as required,
9.6 kbit/s to 56
kbit/s
–0.3 V to 12 V
Serial RX 29
13
24
1
23
35
12
13
24
1
23
35
12
Quick Links:
Figure 3 wiring diagram p.12
rottle & Brake
Types p.20–23
* Molex Mini-Fit Jr. dual-row, 4 circuits, vehicle harness plug (e.g., p/n 39-01-2046)