Analog Communication - Trane TruSense RMWH Installation, Operation And Maintenance Manual

Description
For a list of the registers that are available for exchange
with the MODBUS® controller, refer to
MODBUS Holding Registers," p.
For a list of the BACnet® Objects that are available for
exchange with the BACnet® controller, refer to
E: BACnet Objects," p. 62.

Analog Communication

The device is capable of the following types of analog
outputs:
• 4–20 mA, isolated, current sourcing
• 0–10 Vdc for gas sample point identification
Full scale is 1000 ppm.
Normal gas readings are at 4–20 mA. The reading is
proportional to the detected gas concentration.
For the factory default of 100 percent full scale setting
(0.016 mA = 1 ppm), refer to the following table.
Table 1. Scale analog output: 4–20 mA
Output (mA) Gas Concentration (ppm)
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Table 2. Analog output settings
Warm-up
Calibration (non-configurable)
Fault
Device over range (non-configurable)
The voltage output can be used to identify any active gas
sample line.
10
"Appendix D:
58.
"Appendix
0
63
125
188
250
313
375
438
500
563
625
688
750
813
875
937
1000
• Default = 3.5 mA
• User adjustable between 
0 and 3.75 mA
• 3.0 mA
• Default = 2.0 mA
• User adjustable between 
0.5 and 3.75 mA
• 21 mA
Table 3. 0–10 Vdc
Sample Line 4 or 8 pt system
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
While the device is in calibration mode, the output is
10 Vdc.
Vdc
16 pt system
1 1.0
2 1.5
3 2.0
4 2.5
5 3.0
6 3.5
7 4.0
8 4.5
— 5.0
— 5.5
— 6.0
— 6.5
— 7.0
— 7.5
— 8.0
— 8.5
RMWH-SVX001C-EN