Filter
Top Products
XDT User’s Manual
12
3.3.2 Electrical Connections
All connections are made via a 21 contact, pluggable screw terminal block referred to as P1.
Cable access to the XDT-NEMA enclosure is through three ports (refer to appendix E), which
maintain the NEMA integrity:
• One 1/2” NPT conduit fitting, may be used for high or low voltage connections. This port is
intended for the power and high voltage relay wiring.
• Two watertight cable grips located at the bottom of the instrument: for low voltage wiring
only such as sensor, analog output, RS-232, or relays when used with low voltages. They
accommodate cables with diameters 0.196” to 0.315”. To install a cable, loosen the nut, feed
the cable through the grip and tighten the nut again. Unused cable grips should be plugged to
maintain the integrity of the enclosure.
3.3.2.1 Connecting Power
The XDT is typically provided to be field wired to operate from AC Mains Power of 100 to
250VAC, 50/60Hz, 10VA, the instrument has an internal 0.5A, 250V fast acting fuse. However
the XDT can also be optionally ordered to operate from 15 to 30 VDC 0.5A, with an internal 0.5A
21 C
20 NO
18 Not Connected
14 Not Connected
3 Not Connected
19 NC
17 C
16 NO
15 NC
ALARMS
*
LO
HI
Ordinary relay contacts: 10A, 250VAC or 30VDC
Hermetically Sealed relay contacts: 3A, 120VAC
11 RET
10 RxD
9 TxD
8 A-RET
7 A-OUT
2 AC NEUTRAL
1 AC LIVE
4 AC GROUND
13 AC GROUND
AC Power Input:
100 to 250VAC, 50/60Hz, 10VA
Analog Output 4/20mA or 0/24mA or Voltage
*
SENSOR CABLE
+DC power 15V OUTPUT and/or 15-30V INPUT
*
0.5A
5 SIG-IN
6 SIG-RET
12 PS+
white
black
0.5A 250V
0.1uf
0.1uf
0.0047uf0.0047uf
4.3mH
RFI filter board
275VAC
Power Supply Module
Sensor
Measuring
Circuitry
1M Ohm 33V 400W
Logic ground and AC Power
ground are connected for safety
and electromagnetic
interference considerations
Instrument Circuit board
Pluggable Block Terminals
RS 232 I/O *
Note: * Options will function only if they are installed
CAUTION: Connecting the RS-232C interface
on instruments which do not have the option
installed, will damage the instrument.