TSI Instruments AEROTRAK+ 7201 - Electrical Connections; Device Connections; 12-24 VDC; Relay Connector

2–2 AeroTrak
®
+ Remote Particle Counter Operation Manual
Elect r ical Conn ections
The state-of-the art AeroTrak+ Remote Particle Counter supports
multiple communications and connectivity options. A brief description of
each of the connections is listed below.
Device Connections
• 12-24 VDC/Relay Output Connector
• Ethernet Connector
• USB-C Connector
• AeroTrak+ Wi-Fi Node Operation
• 4-20 mA Analog Output/Wireless Connector
12-24 VDC / Relay Connector
This connector can be used as either a 12–24 VDC power connection
when Power-Over-Ethernet (PoE+) is not available and as a relay
connection.
If used as a power connector, only a TSI-supplied 12 VDC power supply
(such as TSI model PSU-ARWP) should be used.
Terminal
Direction
1
GND
2
12–24 VDC
3
RELAY1 – Contact 1 for internal relay
4
RELAY2 – Contact 2 for internal relay
If used as a relay, the alarm contact is used to indicate an alarm
condition. The alarm contact closure is normally open. The contact
closes upon an alarm, which could be a high particle alarm, a laser error,
a detector error, or a flow error, depending on the configuration of the
particle counter. The relay contact is rated for a 2A @ 30 VDC load. This
relay can be controlled by external software (i.e., FMS) and is configured
on the Configuration Utility.