Michell Instruments XTP601 - Alarm Relay Contacts (PL1- Black); Analog (4-20 Ma) Inputs and Sensor Excitation Voltage (PL4 - Green)

XTP601 User’s Manual
Michell Instruments 33
INSTALLATION
4.5.6 Alarm Relay Contacts (PL1- Black)
AL2 AL1
PIN 6 PIN 5 PIN 4 PIN 3 PIN 2 PIN 1
Alarm 2
C
Alarm 2
NO
Alarm 2
NC
Alarm 1
C
Alarm 1
NO
Alarm 1
NC
• Type: SPCO (NO, NC and C)
• Contact Rating, Max: 2 A, 250 V AC
• Hysteresis is 0.03% O
2
• AL1 and AL2 can be configured as OFF, LOW or HIGH
• A low alarm switches on when % O
2
is below the set point and switches
off when % O
2
is above the set point + Hysteresis
• A high alarm switches on when % O
2
is above the set point and switches
off when % O
2
is below the set point - Hysteresis
• When the instrument is warming up (cell temperature not stabilized) both
relays are OFF
4.5.7 Analog (4-20 mA) Inputs and Sensor Excitation Voltage (PL4 - Green)
PIN 6 PIN 5 PIN 4 PIN 3 PIN 2 PIN 1
Ch2
I/P
-
Ch2
I/P
+
Ch2
Exc.V
Ch1
I/P
-
Ch1
I/P
+
Ch1
Exc.V
The XTP601 features 2 input channels for 4-20 mA signal from external instruments such
as pressure transmitters or other devices to compensate for pressure or background gas
influence.
The input configured as
EXT SENS (External Sensor) can be viewed on the Secondary
Parameters Page under the heading EXT I/P (External Input).
NOTE 1: Channel 1 is External Compensation input and Channel 2 is External
Sensor input.
NOTE 2: Excitation voltage = Same as power supply ±1 V if JMP4 connected
across top 2 pins and 15 ±0.5 V (max 100 mA per channel) if JMP4 connected
across bottom 2 pins.