3.4
The use of screened signal cables is recommended in all installations
After wiring the loose sockets, the covers must be re-fitted for safe operation. To avoid straining
the screw terminal connections attach the cable sheath to the cover by trimming and folding
out the appropriate section of the cover and securing the cable to it using the cable tie provided.
Clip the remaining cover sections into place around the cable.
The loose sockets are provided with end blocks and jack screws which must be fitted and used
to secure them to the corresponding plug. Do not over tighten screws.
The signal terminals each have a legend indicating their function.
3.2.1 mA output and relay output connections
Plugs PL1 to PL4 provide the analogue output and relay output electrical connections. Refer to
Table 3.1. The option card population may be determined by visual inspection.
Plug PL8 provides additional relay output electrical connections for autocalibration connections
only. Refer to Table 3.2.
WARNING
If the external circuits connected to PL1, PL2, PL3, PL4 and PL8 are at a voltage
exceeding 30Vrms (42.4V peak) or 60V dc the following precautions must be
observed to prevent an electric shock hazard:
a) The external circuits connected to PL1, PL2, PL3, PL4 and PL8 must not be
powered with the connector unplugged.
b) The analyser must be mounted in a rack, enclosure, cabinet or similar fixture and
have the external cabling for PL1, PL2, PL3, PL4 and PL8 secured as close as
practical to the connector. This is to prevent strain on the cable pulling the cover
from the socket.
c) Fit covers to loose sockets.
Do not exceed the specified relay rating of 264V rms maximum and 1A maximum.
NOTE
For reliable operation, relays should switch not less than 10mA.
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