- 4 -
ELECTRICAL CONNECTIONS
BASIC INFORMATION
-
It is recommended that the power supply negative pole be grounded (WDESK-D, WINOX,
WTAB: connect the earthing system to the dedicated external terminal ).
-
Connect terminal “– SUPPLY” to the RS485 common of the connected instruments in the event
that these receive alternating current input or that they have an optically isolated RS485.
-
In case of an RS485 network with several devices it is recommended to activate the 120 ohm
termination resistance on the two devices located at the ends of the network, as described in the
paragraph
RS485 SERIAL CONNECTION.
-
E/EC
option (if available): selects 12 groups of 5 setpoint.
WDESK-LIGHT
2 outputs
: settable setpoint.
TERMINALS LEGEND
1
12
2
13
3
14
4
15
5
16
6
17
OUTPUT No. 1
7
RS232: TXD
18
OUTPUT No. 2
8
RS232: RXD
19
OUTPUT COMMON
9
RS485: -
20
+ SUPPLY (12/24 VDC)
10 RS485:
+
21
- SUPPLY (12/24 VDC)
RS232, RS485: SHIELD, GND
11
To access the terminal strip you need to remove the front panel of the instrument
unscrewing the eight screws.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
12-24
VDC
supply
RS485
-
+
SUPP
LY
+
SU
PP
LY
-
TXD
RXD
OUT 1
OUT 2
OU
T COMMON
OUTPUTS
max 115 VAC
150 mA
RS232