VPx Sensor User Manual
14
Mesa Labs, Inc.
12100 W. 6th Avenue
Lakewood, CO 80228 USA
Tel: 303-565-2724
monitoring.mesalabs.c
om
6.0
Ports
The VPx Sensor has 4 I/O ports that can accept 2 channels of RTD temperature probes, 2 channels of
general-purpose analog probes: 4-20 ma, 5v, 10v, 20v and 30v, a discrete switch/contact input, and one
I2C input for a Humidity/Temperature probe.
6-0 VPx Sensor Bottom Side View Showing Ports
VPx Sensor Ports Defined:
Port
Channel
Description
1
1
4-Wire RTD
4-Wire Cryo RTD
DC Voltage - 0 to 5 V, 0 to 10 V, 0 to 20 V, 0 to 30 V
DC 4-20 ma - Various sensors
2
Discrete
Door Status - Open / Closed Door
Dry Contact - Normally Closed or Open
3
2
4-Wire RTD
4-Wire Cryo RTD
DC Voltage - 0 to 5 V, 0 to 10 V, 0 to 20 V, 0 to 30 V
DC 4-20 ma - Various sensors
4
1 and/or 2
Humidity/Temperature
5
N/A
External Power - 5V 1A AC/DC Wall Mount Adapter
(TWA22
–
Power Supply)
Table 6-1 VPx Sensor Bottom Side View Showing Ports
Connections for RTD Probes:
Channel
Pin
Description
1 & 2
1
RTD
–
black wire
2
RTD
–
black wire
3
RTD
–
white wire
4
RTD
–
white wire
Table 6-2 VPx Sensor RTD Probe Pin Assignments
1
2
3
4
5
