Watlow series l rev g - 02-12-08.pdf - Manual (Page 4)

C h a p t e r 1 : O v e r v i e w
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Wa t l o w S e r i e s N 7
Overview
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Series N7 Controller
Watlow’s Series N7 temperature controller pro-
vides ample flexibility for use in a broad range of
applications. The Series N7 delivers up to four zones
of on-off or PID control, that can be sensed with ther-
mocouples (types J, K and E), 2-wire RTDs and 3-
wire RTDs. Voltage or process inputs are also avail-
able.
The Series N7 offers a wide variety of outputs.
The base model has six switched dc outputs, with a
nominal output voltage of 5V and a maximum cur-
rent of 30 mA. Two additional switched dc outputs
can be added, for a total of eight possible outputs. An
optional high-voltage board provides up to six high-
voltage outputs, in place of the switched dc outputs.
The base output module has two solid-state
relays; an option of four additional solid-state relays
is available. The solid-state relays have a maximum
operating current of 0.4 amps. Other available
options offer either two or four electromechanical
relays, or four no-arc relays. The electromechanical
relays and no-arc relays each have a maximum oper-
ating current of 8 amps. The maximum operating
voltage for all high-voltage options is 250VÅ (ac).
Because the Series N7 can operate different types
of equipment, it can replace other controllers, which
simplifies inventory and manufacturing, and reduces
your supplier base. The Series N7 can operate under
many rigorous environmental conditions with an
80°C (176°F) ambient rating and a superior immuni-
ty to electrical interference.
The controller is tested to UL and CE standards.
Features and Benefits
Custom Firmware
• Allows you to customize multiple applications in
one controller.
Custom Overlay
• Customize your interface with up to 32 keys and
32 indicator lights.
Multiple Inputs and Outputs
• Enough inputs and outputs to run most applica-
tions.
• Up to four loops of control, control temperatures
and times.
• Machine functions.
Communications
• Capable of flash downloading firmware, and of
Modbus and PC communications.
Ethernet Communications Add-on Board
• NAFEM Protocol and development of additional
memory
Mounting Options
• The Series N7 mounts either vertically or horizon-
tally to fit your equipment.