Sensor Connections
Two terminal blocks are provided for making connections to analog and digital sensors.
These blocks are located inside MONITOR, behind the front panel. The terminals are
numbered 1 to 22. The following table gives a short description of each of the terminals.
Detailed notes describing how to connect sensors to the terminal blocks are provided in
the
setup section
of this manual.
Terminal
Block
Description
Notes
1
AGND
Analog ground
2
Analog 0-5V ‘A’
Voltage input for sensors with
0-5V output
3
Analog 0-5V ‘B’
Voltage input for sensors with
0-5V output
4 AGND
Analog
ground
5 VREF
2.5V output (turned on during
warmup
and
analog sensor
measurement)
6
DIFF ‘C’ (+)
Differential voltage
input for bridge type sensors
7
DIFF ‘C’ (- )
8
DIFF ‘D’ (+)
Differential voltage
input for bridge type sensors
9
DIFF ‘D’ (- )
10
24V (4-20ma)
24 Volt output for 2 wire
4-20ma sensor
11
I-Input (4-20ma)
Current input for 2 wire
4-20ma sensor
12 Counter
Input
Frequency/period
measurements
13 Gnd
Digital
ground
14 SW’D
Batt
Switched battery (turned on during
warmup
and
analog sensor
measurement)
15
4-20ma Output (+)
Connect 2 wire ‘VOLTAGE’ wire here (eq. 24 Volts) – not
used by MONITOR
16
4-20ma Output (-)
Connect 2 wire ‘-‘ terminal here – not used by MONITOR
17 GND
Digital
ground
7
