Weidmuller G108 Ultra SlimPak - Manual (Page 3)

Unless otherwise specified the factory presets the 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.
For other I/O ranges, refer to table 1 and Figure 4. Reconfigure switches SW1 for the desired input
type, range and function.
Do not attempt to change any settings with power applied. Severe damage will result!
1. With DC power off, position 9 and 10 of SW1 for current or voltage (see Table 1).
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 (see Figure 4).
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 (see Figure 4).
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).
1. After configuring the DIP switches, connect the input to a calibrated DC source and apply power. Refer
to the terminal wiring diagram.
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 at its minimum (fully Counter Clockwise) before adjusting the setpoint. With the
desired trip voltage or current input applied, adjust setpoint until the relay trips. For HI trip calibration, start
with the setpoint above the desired trip. For LO trip calibration, start below the desired trip.
3. Deadband: Set deadband to its minimum (fully counter clockwise). Set the setpoint to desired trip.
Adjust voltage/current input until relay trips. Readjust deadband to 5% (fully Clockwise). Set
voltage/current input signal to desired deadband position. Slowly adjust deadband until relay untrips.
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 0.1 HF pulse film capacitor (foil polypropylene recommended) of sufficient voltage
and a 47 M, 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).
Configuration
WARNING:
Calibration
Relay Protection and EMI
Suppression
Figure 4
G108 Input range/
function selection
(SW1), factory
default settings