Input/Output Terminal Functions - NEC LCD1550X Service Manual

1.8.3. Input/output terminal functions

(1) J703
PIN No.
1
2
3
4
5
6
7
Sequence at inverter ON
Limit
a
b
c
Each terminal turns to LOW simultaneously when the power is turned OFF.
(2) J701 (J702)
PIN No.
1
2
3
4
5
Name
12V Power input
12V Power input
GND GND
GND GND
Inverter power control input
P_INVT
Power ON (HIGH), OFF (LOW)
Protection circuit control input
PRO_DLY
Protection circuit valid (HIGH), invalid (LOW)
Dimming PWM signal input
DUTYCINV
Resonance circuit active (HIGH), inactive (LOW)
P_INVT
a
DUTYCINV
PRO_DLY
Minimum Typical.
20msec 100msec
(400msec) 600msec
b or more 1300msec
Name
HOT_1 (HOT_3) High pressure output 1 (3)
HOT_2 (HOT_4) High pressure output 2 (4)
- No connection
COLD_1 (COLD_3) Ramp return 1 (3)
COLD_2 (COLD_4) Ramp return 2 (4)
1 - 43
Function
c
b
Maximum
(200msec)
c or less
Function