Vaisala HUMICAP HMW90 SERIES - Wiring HMW95; Connecting Multiple Transmitters on RS-485

Chapter 3 ________________________________________________________________ Installation
VAISALA ________________________________________________________________________ 31
Wiring TMW92
1202-117
Figure 16 Wiring TMW92
Wiring TMW93
Recommended wiring for long cables:
1202-118
Figure 17 Wiring TMW93
3-wire connection with -Vs as common ground. Maximum cable
resistance is 2.5 Ω (24V supply, 0 ... 10 V output, relay not used).
1202-119
Figure 18 Three-Wire Wiring for TMW93
-T +T
Power supply
10 ... 28 VDC
R
L
= 0 ... 600 Ω
mA
-T -Vs+T +Vs
Power supply
18 ... 35 VDC
o
r 24
VAC
±20%
V
Relay
max. 50 VDC
500 mA
R
L
= 10 kΩ min.
-
T -Vs
+T +
Vs
Power
sup
ply
1
8 ..
. 35
VDC
or 24 V
AC ±
20%
V
R
elay
R
L
= 10 kΩ m
in.