Michell Instruments XZR200, User Manual

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XZR200 User’s Manual
Michell Instruments 7
INSTALLATION
3.1.1 Ambient Monitoring
When used for ambient monitoring or con fi ned spaces, there are two holes on the rear
of the electronics case that can be utilized for mounting (see Dimensions in Appendix
A). If placed tight against a wall or surface, a heat shield may be required to protect the
surface from being damaged.
3.2 Electrical Connections
g
h
45°
1
2
3
4
5
6
7
8
Pin Number Description
1 24 V DC ± 10%
2 NC
3
0 to 10 V DC / RS232 Rx
4 4-20mA / RS232 Tx
5 Cycle
6 Calibrate
7
GND (0 V DC)
8 NC
Connector Body Housing/Probe Earth
1
2
6
5
4
3
7
8
NOTE: The above view of the electrical
connections is shown from the mating side.
Here are the connections as viewed
from the back of the connector and this
should be used for wiring purposes.
Figure 4 Electrical Connections
Housing connector: 99 3481 578 08
Mating connector: 713 99 1486 812 08
(mating connector supplied loose with each product)
Output pins 3 and 4 are both referenced to the supply GND (pin 7). Due to high
current flow in the supply GND - when monitoring the 0 to 10 V DC output (pin 3) it
is recommended that a separate GND wire for the measurement system is taken from
pin 7. This removes errors due to voltage drops in the power supply connections.