Preparation Of The Sensor Cable; Figure 2 Connector Terminal Block Removal; Figure 3 Wiring Connections - Michell Instruments SF72 User Manual

SF72 Transmitter User's Manual
2.2

Preparation of the Sensor Cable

The sensor cable is NOT supplied as standard. A cable can be obtained by contacting
your local distributor or Michell Instruments (see www.michell.com for details).
Cable connection to the SF72 transmitter is made via the removable connector. Removing
the central screw enables the connector terminal block to be removed from the outer
housing by using a small screwdriver to prise it clear.
For the transmitter to work properly, and to achieve maximum performance, the sensor
cable must be connected to the sensor connector as shown in the drawing below.
NOTE: The drawing below shows the identity of the connector terminals and
wiring connections of the cable manufactured by Michell Instruments.
SCALE 2:1
Michell Instruments
O-ring
and washer
Connector Terminal Block Removal
Figure 2
Caution: When removing the central screw ensure that the
small sealing O-ring and the washer are retained on the screw
and are present during re-installation.
BRAID
GREEN
SIGNAL (SOURCE)
1
BLUE
3
RED GND
2 4
+POWER
VIEW ON REAR
OF CONNECTOR
Figure 3
Always connect the 4-20 mA return signal to a suitable load
(see Figure 3) before the power is applied. Without this
connection, the transmitter may be damaged if allowed to
operate for prolonged periods.
BRAID
SCREEN
GREEN
YELLOW
BLUE
RED
Wiring Connections
INSTALLATION
GN
GREEN - 4-20 mA
RD
RED + POWER
BL
BLUE - SCREEN
GREEN - 4-20 mA
(SOURCE)
BLUE - SCREEN
RED + POWER
3