Electrical Installation; Power Supply And Input/Output Signal; Power Supply (Pl9 - Green); Analog Output - Michell Instruments XTC601 User Manual

XTC601 User's Manual
4.5

Electrical Installation

4.5.1

Power Supply and Input/Output Signal

The XTC601 requires 24 V DC power input at a maximum start-up current of 1.5 A.
All versions will use a braid screened multi-core cable. Ideally, one cable for signals
(PL4, PL5) and another cable for power (PL9) / relay contacts (PL1). Braid of cables
must be well terminated at the cable glands. Wire sizes should be between 28 to 16
AWG.
The terminal blocks for the power supply, input signal and output signal are located
underneath the lower PCB. NOTE: The terminal blocks are color co-ordinated to
match the connectors - make sure this color coding is adhered to.
Pin1
4.5.2

Power Supply (PL9 - Green)

4.5.3

Analog Output

Two 4-20mA analog outputs are available. Both are for Thermal Conductivity
concentration. One is fixed on the calibrated range of the unit and the second can
be configured in the menu. NOTE: When the instrument is warming up (cell
temperature not stabilized) these outputs are set to 3.5 mA to indicate that
the instrument is not ready.
• The maximum mA output is approximately 25 mA
• The minimum mA output is approximately 0 mA
Michell Instruments
Pin1
PL9
PL5
JMP3
Figure 35
PIN 3
0 V
PL4
JMP4
Terminal Block Locations
PIN 2
N/C 24 V ±4 V
INSTALLATION
Pin1
PL1
Pin1
Relays
PIN 1
35