Installation Guide User guide

25
Appendix 2: 2-Wire Sensor Module (2WSNS)
The 2-Wire Sensor Module (2WSNS) is designed to accept 12
sensor inputs per module, and the system as a whole can accept
a total of 36 sensors (3 modules with 12 inputs each). The 2WSNS
only supports standard sensors, and does not accept inputs from
BriteSensors. Refer to the diagram below to identify some of the
standard sensors that can be used with this module.
Note: Standard sensors do not use digital data. They operate like ON–OFF switches, which are closed when no liquid is
present and open when a liquid is detected.
Note: All components located in the hazardous area must be Third Party Certied and have appropriate Entity
Parameters (see Control Drawing 000-1722 in the back of this manual for further information).
2-Wire Sensor Module
Number of Channels: 12
Safety Rating: Class I, Division 1, Group D, [Ex ia] IIA
Entity Parameters
Uo = 6.51 V
Io = 2.04 mA
Co = 500 uF
Lo = 100 mH
Po = 3.3 mW
Figure 2-1 – 2-Wire Sensors Connections
2-Wire Sensor
Module
RUN
ERR
9
8
7
–Blk
+Wht
–Blk
+Wht
–Blk
+Wht
12
11
10
–Blk
+Wht
–Blk
+Wht
–Blk
+Wht
3
2
1
–Blk
+Wht
–Blk
+Wht
–Blk
+Wht
6
5
4
–Blk
+Wht
–Blk
+Wht
–Blk
+Wht
- (BLK)
(WHT)
- (BLK)
TSP-ULS
(universal liquid sensor)
TSP-HLS
(high level sensor)
Non-Hazardous
Location
Hazardous Location
Class I, Division 1, Group
D, Group IIA, Zone 0
Class I, Division 1, Group D