2.1.3.1 Sensor Input
Electrical connection to the model MAX-250 oxygen sensor is made by connecting the supplied
sensor interface cable between the analyzer and the sensor. Attach the sensor interface cable to
the model 1100 analyzer female 180° 3-pin DIN cable connector. For the wall mount version
(analyzer mounted in an enclosure) of the analyzer, connections to the sensor are made at
terminal block TB4. Match the sensor input connector against the mating connector on the sensor
interface cable. When the model GP oxygen sensor with mA output (part number 8-01-1000-02-2)
a 47 ohm resistor will be factory installed between TB4-1 and TB4-2. Fix all wiring and connectors.
2.1.3.2 Alarm-1 Relay Output
Connections from the Alarm-1 relay contacts to the user’s process control equipment are made at
terminal block TB2 on the rear of the analyzer chassis. The oxygen alarm relay contacts are
voltage-free Form C relay contacts, SPDT, 5A @ 250 VAC, 5A @ 30 VDC. Be certain to match
the terminal pins against the terminal ID label on the top of the analyzer chassis.
2.1.3.3 Alarm-2 Relay Output
Connections from the Alarm-2 relay contacts to the user’s process control equipment are made at
terminal block TB2 on the rear of the analyzer chassis. The oxygen alarm relay contacts are
voltage-free Form C relay contacts, SPDT, 5A @ 250 VAC, 5A @ 30 VDC. Be certain to match
the terminal pins against the terminal ID label on the top of the analyzer chassis.
2.1.3.4 Fault Relay Output
Connections from the Fault relay contacts to the user’s process control equipment are made at
terminal block TB2 on the rear of the analyzer chassis. The fault relay contacts are voltage-free
Form B relay contacts, SPST, 5A @ 250 VAC, 5A @ 30 VDC. Be certain to match the terminal
pins against the terminal ID label on the top of the analyzer chassis.
2.1.3.5 Range ID Output
Connections from the Range ID output to the user’s auxiliary equipment are made at terminal block
TB2 on the rear of the analyzer chassis. Be certain to match the terminal pins against the terminal
ID label on the top of the analyzer chassis.
Use 20-AWG, 2-conductor, stranded-wire, twisted pairs for the connections. It is not necessary to
use shielded cable for the Range ID output, with or without electrical barriers. If shielded cable is
used, it should be drained to dc ground at the auxiliary equipment.
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