Panametrics Sentinel, User Manual, Page: 26 / 166

Chapter 1. Installation
16 Sentinel™ User’s Manual
1.8.2 Wiring the Line Power
The Sentinel may be ordered for operation with a power input of either 85-264 VAC or 15–36 VDC (see “Electronics
Ordering Information” on page cxxviii ). The label on the side of the electronics enclosure lists the required line voltage
and power rating for the meter. Be sure to connect the Sentinel to the specified line voltage only.
Note: For compliance with the EU Low Voltage Directive, this unit requires an external power disconnect device
such as a switch or circuit breaker. The disconnect device must be marked as such, clearly visible, directly
accessible, and located within 1.8 m (6 ft) of the unit .
Note: Use only Class 2 rated power supplies for the line power to DC instruments.
IMPORTANT: Use cable and cable glands approved for Class I, Division 1 locations.
See Figure 13 on page xxvii to locate terminal block TB5 and connect the line power to the Sentinel as follows:
1. Prepare the line power leads by trimming the line and neutral AC power leads (or the positive and negative DC
power leads) to a length 0.5 in. (1 cm) shorter than the ground lead. This ensures that the ground lead is the last
to detach if the power cable is forcibly disconnected from the meter.
2. Install a suitable cable gland in the
Power Cable Inlet
conduit hole indicated in Figure 13 on page xxvii . If possible,
avoid using the other conduit holes for this purpose, to minimize any interference in the circuitry from the AC
power line.
3. Strip 1/4-in. of insulation from the end of each of the three line power leads.
4. Route the cable through the chosen conduit hole of enclosure #2 and connect the line power leads to terminal
block TB5, using the pin number assignments shown in Figure 21 on page xxxix and Figure 13 on page xxvii .
5. Leaving a bit of slack, secure the power line with the cable clamp.
WARNING!
Improper connection of the line power leads or connecting a Sentinel to the incorrect
line voltage may damage the unit. It may also result in hazardous voltages at the meter
body and associated piping as well as within the electronics enclosure.
WARNING!
To meet CE Mark requirements, all cables must be installed as described in Appendix A,
CE Mark Compliance .