© 2021 All rights reserved. Data subject to change without notice.
25
Rev. E | 2021.03
LPT - Operation Manual
6.7.2 Wire Gauge vs Run Length
SUPPLY VOLTAGE
MAXIMUM LOAD
(Wire + Termination
Resistor) (ohms)
WIRE GAUGE (awg)
MAXIMUM CABLE
LENGTH (feet)
24 VDC
592
20
4,400
18
7,100
16
10,700
16 VDC
216 (assume a 200 Ω
termination resistor)
20
700
18
1,200
16
1,800
24 VAC
1,060
20
27,100
18
43,200
16
65,500
12 VAC
316 (assume a 200 Ω
termination resistor)
20
5,600
18
8,900
16
13,583
NOTES:
The termination resistor could be as high as 500 Ω (10 volt measurement at 20 mA). A poor
quality 24 VAC transformer might supply as little as 14 volts at low line conditions.
Upon applic
ation of power, the green LED light indicator will illuminate and will be fl ashing and
the curr
ent output is fi xed at 4.0 mA for 5 minutes for a system warm up period. After the warm
up period, the system may exhibit gas alarm condition if the sensor has not completely stabilized
