H2B USER'S MANUAL - 550145G Page 13/60
3.4 H2B CONNECTORS
pin function description
A1 -LED Alarm LED negative: to be connected to the cathode
A2 +LED Alarm LED positive: to be connected to the anode
Output current 12mA, for standard type LED
B1 PCLRXD Serial reception positive
B2 NCLRXD Serial reception negative
B3 PCLTXD Serial transmission positive
B4 NCLTXD Serial transmission negative
B5 GND Console supply negative
B6 +12 Console supply positive
B7 FUNCTION SELECT Channel for mini-console (speed signal)
B8 UP/DOWN Channel for mini-console (speed ref.)
C1 CPOT Potentiometer central pin: connected to the potentiometer
cursor. For speed regulation, the useful signal ranges from
0 Volt (minimum speed) to 10 V (maximum speed).
C2 NPOT Potentiometer negative: a battery negative.
C3 PPOT Potentiometer positive: a 12 V output.
Do not short circuit this terminal toward the battery nega-
tive or apply a resistive load of less than 500 ohm.
D1 +CH IN To be connected to the key.
D2 +CH OUT The positive, to be sent to the function request micros-
witches, is taken from this pin.
This positive is taken after the internal diode.
E1 Pins to which the signals for function request
E2 are sent; their meanings varies according to the
E3 model selected and pin programming.
E4 INPUT A detailed description is given in the chapters
E5 dedicated to the specific models. Pin E4, if forced
E6 to low level, inhibits the effect of pins E8 and E9.
E7
E8 RI (low) Activates the same request as for pin E4 with a low ca-
pacity level (less than 10 V).
E9 RI (low) Like E8 but electrically disconnected.
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