Table 1-1. Maximum Power Cable Length
CONFIGURATION MAXIMUM POWER CABLE LENGTH (IN FEET)
(WITH NOMINAL 24-VDC TRANSMITTER SUPPLY)
CATALYTIC XIR E-CHEM 16 AWG CABLE 14 AWG 12 AWG
[4.2 OHM [2.6 OHM [1.8 OHM
PER 1K FT.] PER 1K FT.] PER 1K FT.]
NO RELAY NO RELAY NO RELAY
RELAYS- OPTION- RELAYS OPTION RELAYS OPTION
0 0 3 4500 3500 7500 5500 10,000 7,500
0 2 1 2000 1500 2750 2500 4,000 3,500
0 1 2 3000 2250 4500 3500 6,250 5,000
1 0 2 3500 2750 5500 4250 7,500 6,000
1 1 1 2000 1500 2750 2500 4,000 3,500
2 0 1 2500 1850 3500 3000 5,000 4,000
3 0 0 2000 1500 2750 2500 3,750 3,500
Daisy chaining power to multiple sensors is not recommended.
Table 1-2. Transmitter Power Consumption (7-30 VDC Supply)
CONFIGURATION MAX. POWER MAX. POWER
CONSUMPTION CONSUMPTION
CATALYTIC XIR* E-CHEM* WITH RELAYS CLOSED WITH RELAYS OPEN
0 0 3 2.5 W 1.5W
0 2 1 9.5 W 8.5W
0 1 2 7.0 W 6.0 W
1 0 2 6.0 W 5.0 W
1 1 1 6.5 W 5.5 W
2 0 1 8.0 W 7.0 W
3 0 0 10.0 W 9.0 W
*Combinations shown represent maximum loads that may be powered from one
transmitter without remote power.
NOTE: Only use single catalytic or XIR sensor configuration with 7 W power supply.
If at least one sensor is remote with signal boost or has remote power, any combination is available.
Recommended power supply selection is for operation not to exceed 65% of capacity.
See Installation Outline Drawings for details.
Table 1-3.
Remote Sensor Power Consumption (AC or DC Operation)
SENSOR TYPE MAXIMUM POWER CONSUMPTION
Catalytic* 4.5 W
XIR* 5.0 W
E-Chem 1.5 W
*The input for the 240 VAC Remote XIR and XE Sensors shall be additionally limited to
3.5 A.
1-4
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