Watlow EHG SL 10 User Manual

The Series EHG SL 10 is a powerful instrument that in-
tegrates a temperature process controller, high-low tem-
perature alert, and power switching with a safety high
limit that meets UL
®
1998 and CE 60730 requirements.
The optional display and communications modules can
be easily upgraded in the field to provide a digital dis-
play, adjustable control parameters, RS485 MODBUS
communications and other interface features. The com-
pact design, inherent reliability and integrated safety
limit functions make this control a tremendous value.
The control is designed for easy integration with Wat-
low heaters providing additional value to simplify the
engineering and component count on new equipment.
CE compliance and UL recognition will reduce time and
costs necessary for global agency testing and validation
for OEMs.
Features and Specifications
Standard Base Module
· 2, Type K Thermocouple Inputs: Process Temperature Controller
and Safety Limit.
· Isolated Universal Power Supply: 100 to 240VÅ (ac) 50/60Hz
· Ambient operating temperature range 0 to 70°C
· Process Temperature Output: 10 amp “No Arc” relay
· Safety Limit: 10 amp relay
· High-Low Temperature Alert: 2 amp, 30Vı (ac/dc), Form A relay
· On-Off and PID temperature control algorithm. Upgraded via com-
munications to PID algorithm (minimum cycle time 5 seconds).
0600-0050-0000 Rev. C
May 2006
Integrated Temperature Control
· Standard Molex Connectors
· Dimensions
configuration width depth height
basic unit 88.8 mm
(3.496 in)
40.2 mm
(1.582 in)
55.8 mm
(2.196 in)
with mounting bracket 88.8 mm
(3.496 in)
48.4 mm
(1.907 in)
55.8 mm
(2.196 in)
with communicatons-dis-
play module & mounting
bracket
88.8 mm
(3.496 in)
63.6 mm
(2.503)
55.8 mm
(2.196 in)
· Agencies: UL
®
/C-UL Listed, CE, Semi S2
Optional Communications Module
· Field adjustable set point
· Access to PID parameters
· Modbus RTU Communications
· RS 485
· 3-character, 7-segment LED display
· User Interface Software
The Series EHG SL 10 User’s Manual is copyrighted
by Watlow Winona, Inc., © May 2006, with all rights re-
served.
Patent Pending
Watlow Winona
1241 Bundy Boulevard
Winona, MN 55987
Phone: (507) 454-5300; Fax: (507) 452-4507
www.watlow.com
Series EHG SL 10
Integrated Temperature Controller
User’s Manual

Watlow EHG SL 10 Specifications

General

Control Modes	On/Off, PID
Input Types	Thermocouple, RTD
Output Types	Relay, SSR
Supply Voltage	100-240 VAC
Display	4-digit LED
Communication	RS-485 Modbus RTU
Enclosure Rating	NEMA 4X

Summary

Features and Specifications

Standard Base Module

Details the standard controller's features, inputs, outputs, and operating parameters.

Integrated Temperature Control Dimensions

Provides physical dimensions and connector information for the integrated unit.

Agency Approvals

Lists the certifications and agency compliance standards for the product.

Optional Communications Module

Outlines the features and capabilities of the optional communications module.

Navigating the Front Panel Controls

Parameter Navigation and Settings

Explains how to navigate parameters and adjust settings on the front panel.

Keys and Indicator Lights

Proportional Control

Explains proportional control and its effect on output based on proximity to set point.

Proportional Plus Integral (PI) Control

Describes how integral control corrects for droop in proportional control.

Proportional Plus Integral Plus Derivative (PID) Control

Explains derivative control for minimizing overshoot in PI control systems.

Mounting and Wiring

Mounting Dimensions

Provides panel mount dimensions and mounting bracket details.

Wiring Connections

Illustrates power, relay, and thermocouple wiring connections.

Ordering Information

Lists product part numbers and optional accessories for the Series EHG SL 10.

Declaration of Conformity

Lists CE and other agency compliance standards met by the product.