3 — INSTALLATION AND WIRING
Curtis Model 3401T – August 2022
pg. 26
OPERATING VOLTAGE
The following table describes the B+ startup and operating voltages:
Minimum
Minimum Startup
Nominal
Maximum
8 VDC
10 VDC
12–96 VDC
120 VDC
Applying B+ voltages above 120V may damage the 3401T and is not recommended. The device is
designed to withstand reverse polarity connections continuously.
Note: All voltages listed in this manual are DC voltages.
OPERATING CURRENT
The following tables describe the B+ pin’s operating current with the LCD heater off and on:
Table 3-4 Operating Current — LCD Heater Off
B+ Voltage
(V)
Keyswitch On (mA)
Keyswitch
Off (mA)
Typical
Maximum
12
166
207
112
24
80
99
56
36
56
68
40
48
45
53
33
60
39
46
29
72
36
41
27
80
34
39
26
96
33
37
25
Table 3-5 Operating Current — LCD Heater On
B+ Voltage
(V)
Typical
(mA)
Maximum
(mA)
12
760
801
24
682
703
36
650
665
48
634
642
60
615
620
72
596
600
80
584
588
96
566
568