Doc#
M9005 • REV N
(May 2017) Page
4 of 12
WIRING
Terminal Wiring
If you have selected the optional display, the display circuit board must be removed (two
screws) to expose the terminal strips. The display board cable should not be disconnected.
Simply place the display board out of the way to allow wiring to the terminal strips. The
display may be reinstalled in any of the four possible orientations. Connection to the unit is
through one or two conduit entries (See Metrix Drawing 9030). The cable gland or conduit
entries shall be in accordance with 13.1 of EN60079-1 and IEC60079-1. The user must provide
appropriate seal and sealing materials for the rates installation. Unused conduit entries must
be plugged with a plug that conforms to Clause 13.2 of EN60079-1 and IEC60079-1. The inter
-
nal ground connector allows for the connection of a 14 AWG wire. This has a cross section of 2
mm
2
. The external ground terminal can accommodate a 10 AWG wire that has an cross section
area of 5 mm
2
. It is comprised of an M5 bolt with two flat washers and one lock washer.
Refer to Figure 2 for wiring information. For incoming power and switch output(s) use ap
-
proved wire of 14 AWG (1.5 mm
2
) or smaller.
For the current and dynamic signal outputs, a shielded twisted pair is recommended. By
convention, the shield should be tied to common only at the receiver end. A cable consist
-
ing of separate shielded twisted pairs can also be used. For the dynamic signal output, the
capacitance of the cable run must not exceed 0.03
m
F (typically 1000 ft).
NOTE:
On ATEX/IECEx approved units, a locking set
screw must be loosened prior to lid removal.
CAUTION:
Conduit seals are highly recommended to prevent the entry
of moisture into the switch. Moisture will damage the switch and void
the warranty. Internal and external protective earth connections must
be connected to the installation protective earth circuits.
Power Wiring
It is highly recommended that all power and triac/FET wiring be routed separately from the
external sensor, the dynamic signal and 4-20mA wiring in order to reduce AC/transient noise
pickup. The power required is indicated on the nameplate. The voltage supply must be
within the following limits:
24 VDC:
20 VDC to 28 VDC
115 VAC:
95 VDC to 125 VAC, 50/60 Hz
230VAC:
190 VDC to 250 VAC, 50/60 Hz
Polarity does not need to be observed when wiring for DC power. The preferred method of
operation is to continuously apply power to the SW6000. If power is to be applied as a part
of the machine startup sequence it is advisable to apply power to the SW6000 30 seconds
prior to starting the machine in order to allow the electronics circuits to stabilize. This is
particularly important if the adjustable startup delay option is utilized and the delay is set to
less than 20 seconds.
