Chapter 3 _______________________________________________________________ Installation
VAISALA _______________________________________________________________________ 51
0508-029
Figure 31
Third analog output selection
8. Connect
the
power.
9.
Select the quantity and scale the channel via the serial line or
display/keypad, see section Analog Output Quantities on page 108.
For testing the analog output, see Section Analog Output Tests on
page 110. For fault indication setting, see section Analog Output
Fault Indication Setting on page 111.
Alarm Relays
DMT346 can be equipped with one or two configurable relay modules.
Each module contains two configurable relays. See the contact ratings in
section Technical Specifications of Optional Modules on page 146.
Installation and Wiring
1.
Disconnect the power. In case the relay-module is installed in the
factory, continue with the step 5.
2.
To attach the module, open the transmitter cover and fasten the
relay module to the bottom of the housing with four screws. See the
position in Figure 2 on page 23.
3.
When the mains power is in use attach the grounding wire to the
grounding terminal.
4.
Connect the flat cable between the relay module and the
motherboard's pins
MODULE 2
or
MODULE 1.
5.
Take out the protective plug from the cable gland and thread the
relay wires.
6.
Connect the wires to the screw terminals:
NO
,
C
,
NC
.
CAUTION
For installations in the USA: If your transmitter has both the relay
module and a LAN or WLAN module, the maximum voltage you are
allowed to connect to the relay module is 50 V.