SECTION 2: SYSTEM INSTALLATION
YZ Systems Milton Roy • 201 Ivyland Road • Ivyland, PA • USA • 18974 • P: 281.362.6500 • www.yzsystems.com
NJEX ZEO Version 04/13/2021
Page 17
Standard System Connections
Required field connections to place the NJEX ZEO system into operation are as follows:
1. AC Power Connections - There are two possible AC power connections configurations
depending on the cabinet installation location.
a For cabinets in North America with a Class 1, Division 1 hazardous location
certification, there are four AC power connections that share a common ground that
route through the explosion proof box located in the lower cabinet of the system
enclosure for a total of nine wires.
A ¾” conduit fitting is provided at the back of the
cabinet for connection.
b For cabinets outside of North America with a Zone 1 hazardous location certification,
there is a 12 conductor 14AWG power cable that is supplied through a grommet and
out the back of the cabinet. There are four pairs with individual grounds that are
connected in the flameproof enclosure located in the lower cabinet of the system
enclosure.
Power Requirements in Section 1
for the required specifications on the incoming power
connections. The incoming power connections shall be terminated in a junction box (not
provided) in accordance with local codes and regulations for the area in which the system is
installed.
IMPORTANT: Suitably rated overcurrent protection must be applied to the AC wiring for
both the Injection Pump motor and Transfer Pump motor in accordance with local codes
and regulations.
3. Connect the analog flow signal device to the termination block (TB8) located in the N-400
Controller OR the pulsed flow input to the termination block (TB2). Note the jumper placement
(JP4) for each analog flow signal type and adjust if necessary. If using a pulsed flow input,
the jumper position (JP4) is inconsequential. Refer to the
and the Wiring Diagram reference label located inside the N-400 Controller Door
or below in Figure 4.
4. For cabinet only systems, connect the tank level device to the termination block (TB11)
located in the N-400 Controller. For skid mount systems, the tank level device will be factory
wired to the N-400 Controller. In the instance of a dual cabinet skid mounted unit, the tank
level will only be wired to one controller. Note the jumper placement (JP7) for tank level signal
type and adjust if necessary. Refer to the
Wiring Control Document in Appendix B
Wiring Diagram reference label located inside the N-400 Controller Door or below in Figure 4.
5. If used, connect the optional Remote Inhibit Input signal to the termination block (
TB2
) located
in the N-400 Controller. Refer to the
Wiring Control Document in Appendix B
Diagram reference label located inside the N-400 Controller Door or below in Figure 4.
IMPORTANT: In a system with two cabinets wired for redundancy, the Remote Inhibit input
is used to connect the primary and backup systems. Remote Inhibit will not be available
for use. See Step 7 below for wiring for redundancy.
6. If used, connect the RS-485 communication wiring as required to the termination block (
TB16
)
located in the N-400 Controller
.
Wiring Control Document in Appendix B
Wiring Diagram reference label located inside the N-400 Controller Door or below in Figure 4.
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