Vaisala HUMICAP HMW90 SERIES, Quick Manual, Page: 12 / 118

10
Wiring TMW92
TMW92 is loop powered. Minimum supply voltage
depends on loop resistance: 10 ... 28 VDC at 0 Ω load,
20 ... 28 VDC at 500 Ω load.
-T +T
Power supply
10 ... 28 VDC
R
L
= 0 ... 600 Ω
mA
Wiring TMW93
Recommended wiring for long cables:
-T -Vs +T +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
V
Relay
max. 50 VDC
500 mA R
L
= 10 k Ω min.
3-wire connection with -Vs as common ground.
Maximum cable resistance is 2.5 Ω (24V supply,
0 ... 10 V output, relay not used).
-T -Vs +T +Vs
Power supply
18 ... 35 VDC
or 24 VAC ±20%
V
Relay
R
L
= 10 k Ω min.