G108-0001.V1 - EUROTHERM CONTROLS

Description

The Ultra SlimPak G108 is a DIN rail mount, DC voltage or current

input limit alarm with dual setpoints and two contact closure

outputs. The field configurable input and alarm functions offer

flexible setpoint capability. Input voltage spans from 10mV to

200V and input current spans from 1mA to 100mA can be field

configured. Bipolar inputs are also accepted.

The G108 is configurable as a single or dual setpoint alarm, with

HI or LO trips and failsafe or non-failsafe operation. Also included

are adjustable deadbands (0.25 to 5% of full scale input) for each

setpoint, a 24VDC voltage source (isolated from line power) for

transducer excitation, and a flexible DC power supply which

accepts any voltage between 9 and 30VDC.

Diagnostic LEDS

The G108 is equipped with three front panel LEDs. The dual

function green LED is labeled INPUT and indicates line power and

input signal status. Active DC power is indicated by an illuminated

LED. If this LED is off, check DC power and the wiring connection.

If the input signal is more than 110% of the full scale range, the LED

will flash at 8 Hz. Below 0%, it flashes at 4 Hz. Two red LEDs indicate

the relay state for each setpoint. An illuminated red LED indicates

the tripped condition.

Output

The G108 is equipped with two SPDT (form C) relays, rated at

120VAC or 28VDC at 5 Amperes. Each of these relays is indepen-

dently controlled by the field configurable setpoint and deadband.

Operation

The field configurable G108 limit alarm setpoints can be config-

ured for HI or LO, failsafe or non-failsafe operation. Each of the

setpoints has a respective HI or LO deadband. In a tripped

condition, the setpoint is exceeded and the appropriate red LED

will illuminate. The trip will reset only when the process falls below

the HI deadband or rises above the low deadband (see Figure 1).

For proper deadband operation, the HI setpoint must always be

set above the LO setpoint. In failsafe operation, the relay is

energized when the process is below the HI setpoint or above the

LO setpoint (opposite for non-failsafe). In the failsafe mode, a

power failure results in an alarm state output.

ULTRA SLIMPAK®

G108-0001

DC Powered DC Input Limit Alarm

Provides Relay Contact Closures

at a Preset DC Input Level

Programmable HI or LO, Failsafe or Non-failsafe

Field Configurable Input Ranges

24VDC Transducer Excitation

LED Trip and Input Indicators

G108-0001

Flexible Power Supply Accepts 9 to 30 VDC

ASIC Technology for Enhanced Reliability

RoHS Compliant

Dynamic Deadband

Circuitry in the G108 prevents false trips by repeatedly sampling

the input. The input must remain beyond the setpoint for 100

milliseconds, uninterrupted, to qualify as a valid trip condition.

Likewise, the input must fall outside the deadband and remain

there for 100 milliseconds to return the alarm to an untripped

condition. This results in a “dynamic deadband” (based on time)

in addition to the normal deadband.

Configuration

Unless otherwise specified, the factory presets the Model G108 as

follows:

Input: Current

Range: 0-20mA

Output: Dual, SPDT

Trip: A:HI, B:LO

Failsafe: No

Deadband: A, B: 0.25%

The DC power input accepts any DC source between 9 and 30V.

Typically a 12V or 24VDC source is used (see Accessories).

For other I/O ranges, refer to Table 1. Reconfigure switch SW1 for

the desired input type, range and function.

1. With DC power off, set position 9 and 10 of SW1 for current or

voltage (see Figure 4).

2. Set position 1 through position 4 of input range switch “SW1”

for the desired input range (see Table 1).

3. Set position 5 of input range switch “SW1” to ON for unipolar

(e.g. zero based, 0-20mA) range or OFF for bipolar (e.g. -100%

offset, -20 to 20mA) range.

4. Set position 6 and 7 of input range switch “SW1” to ON for a HI

trip setpoint or OFF for a LO trip setpoint.

5. Set position 8 of input range switch “SW1” to ON for non-failsafe

operation or OFF for failsafe operation (e.g. alarm trips upon

power failure).

Calibration

1. After configuring the DIP switches, connect the input to a

calibrated DC source and apply power. Refer to the terminal wiring

(Figure 7).

Note: To maximize thermal stability, final calibration should be

performed in the operating installation, allowing approximately 1

to 2 hours for warm up and thermal equilibrium of the system.

2. Setpoint: Set deadband to its minimum (fully counterclockwise)

before adjusting the setpoint. With the desired trip voltage or

current input applied, adjust the setpoint until the relay trips. For

HI trip calibration, start with the setpoint above the desired trip

(full clockwise). For LO trip calibration, start below the desired trip

(full counterclockwise).

3. Deadband: Set deadband to its minimum (fully counterclock-

wise). Set the setpoint to desired trip. Adjust the input until the

relay trips. Readjust deadband to 5% (fully clockwise). Set the

input signal to desired deadband position. Slowly adjust deadband

until relay untrips.

Figure 4: G108 Input Range/Function Selection (SW1) Factory Default Settings

Off

Bipolar

Unipolar Off

"B" LO Trip

"B" HI Trip Off

"A" LO Trip

"A" HI Trip Off

Failsafe

Non-failsafe Off

Voltage

Input Enabled Off

Current

Input Enabled

Input Range

See Figure 5

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Table 1: G108 Input Range Settings

Figure 1: Limit alarm operation and effect of deadband.

Figure 2: DC Inductive Loads Figure 3: AC Inductive Loads

Relay Protection & EMI Suppression

When switching inductive loads, maximum relay life and transient

EMI suppression is achieved using external protection (see Figures

2 and 3). Place all protection devices directly across the load and

minimize all lead lengths. For AC inductive loads, place a properly

rated MOV across the load in parallel with a series RC snubber. Use

a 0.01 to 0.1uF pulse film capacitor (foil polypropylene recom-

mended) of sufficient voltage, and a 47 ohm, 1/2W carbon

resistor. For DC inductive loads, place a diode across the load (PRV

> DC supply, 1N4006 recommended) with (+) to cathode and (-

) to anode (the RC snubber is an optional enhancement).

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Table 2: G108 Trip Settings

Figure 5: G108 Factory Cal; 0-20mA, A-HI/B-LO, Non-Failsafe

Note: All Ultra SlimPak modules are designed to operate in ambient

temperatures from 0 to 55

C when mounted on a horizontal DIN rail. If

five or more modules are mounted on a vertical rail, circulating air or

model HS01 Heat Sink is recommended. Refer to HS01 Technical

Bulletin (#721-0549-00) or contact the factory for assistance.

Figure 6: Typical Connections of Voltage or Current Inputs

Figure 8: Mounting Multiple Modules

Figure 7: Terminal Wiring Diagram for G108

Dimensions

Ordering Information

Models & Accessories

Specify:

1. Model: G108-0001

2. Accessories: (see Accessories)

3. Optional Custom Factory Calibration; specify C620 with desired

input and output range.

Accessories

SlimPak “G” series modules will mount on standard TS32 (model MD02) or TS35

(model MD03) DIN rail. In addition, the following accessories are available:

HS01 Heatsink (vertical rail applications)

MD03 TS35 x 7.5 DIN rail

WV905 24VDC Power Supply (0.5A)

H910 24VDC Power Supply (1A)

H915 24VDC Power Supply (2.3A)

MB03 End Bracket for MD03

C664 I/O Descriptive Tags

C006 Shunt Resistor (0.1 ohm, 5A max.)

Setpoints

Effectivity:

Setpoints are adjustable over 100% of

the selected input span.

Repeatability (constant temp.):

>50mV/5mA: 0.1% of full scale

<50mV/5mA: 0.2% of full scale

Stability

Temperature: +0.05% of full scale/°C, max.

Excitation Voltage

24VDC, 20mA, maximum

Common Mode Rejection

DC to 60Hz: 120dB

Isolation

1800VDC between contacts, input & power

EMC Compliance (CE Mark)

Emmissions: EN50081-1

Immunity: EN50082-2

Safety: EN50178

Humidity (Non-Condensing)

Operating: 15 to 95% @45°C

Soak: 90% for 24hours @65°C

Temperature Range

Operating: 0 to 55°C (32 to 131°F)

Storage: -25 to 70°C (-13 to 158°F)

Power

Consumption: 1.5W typical, 2.5W max.

Supply Range: 9 to 30VDC, inverter isolated

Specifications

Inputs

Voltage

Range: 10mV to +200V

Impedance: >100K ohms

Overvoltage: 200V rms, max.

Current

Range: 1mA to +100mA

Impedance: 20 ohms, typical

Overcurrent: 170mA rms, max.

Overvoltage: 60VDC (protected by self

resetting fuse)

Common Mode (Input to Ground):

1800VDC, max.

LED Indicators

Input Range (Green)

>110% input: 8Hz flash

<0% input: 4Hz flash

Setpoint (Red)

Tripped: Solid red

Safe: Off

Limit Differentials (Deadbands)

>50mV/5mA: 0.25% to 5% of span

<50mV/5mA: 1% to 5% of span

Response Time

Dynamic Deadband:

Relay status will change when proper

setpoint/process condition exists for

100msec.

Normal Mode (analog filtering):

<250mSec, (10-90%)

Eurotherm, Inc

741-F Miller Drive

Leesburg, VA 20175-8993

703-443-0000

info@eurotherm.com or www.eurotherm.com/actionio

Factory Assistance

For additional information on calibration, operation and installation

contact our Technical Services Group:

703-669-1318

Action Instruments Barber-Colman Chessell Continental Eurotherm

actionsupport@eurotherm.com

Relay Contacts

2 SPDT (2 form C) Relays

1 Relay per setpoint

Current Rating (resistive):

120VAC: 5A; 240VAC: 2A; 28VDC: 5A

Material: Gold flash over silver alloy

Electrical Life:105 operations at rated load

Note: External relay contact protection is

required for use with inductive loads

(see Figures 2 & 3).

Mechanical Life: 107 operations

Wire Terminations

Screw terminations for 12-22 AWG

Weight

0.56lbs.

Agency Approvals

UL recognized per standard UL508

(File No.E99775)

CE Conformance per EMC directive 89/

336/EEC and Low Voltage 73/23/EEC

(Input < 75VDC, only).

RoHS Compliant

Printed on recycled pape