GO1
PASSIVE
GALVANIC
SEPARATION
USE
The galvanic separation is designed primarily as an input interface for data acquisition monitoring systems, control
systems, control automats etc. It can be used wherever it is necessary to galvanically separate a 4 – 20mA current
loop so that no undesirable influencing of input circuits of evaluation systems occurs and, at the same time, perturbing
influences of industrial environment are suppressed. The separation can have a single or double channel. The
galvanic separation input and output are passive, i.e. without internal power supply. The power source is the 4 – 20mA
current loop.
CHARACTERISTICS
The GO1 passive galvanic separation has the following basic properties:
• 3700Vef insulation between the input and output circuits,
• passive circuit input and output,
• analogue signal transfer via a linear optical element,
• transfer error better than +/-0.2%,
• single-channel or double-channel separation in one device,
• easy installation and connection,
• standard plastic box for DIN rail mounting.
FUNCTION
The GO1 passive galvanic separation functions as a linear passive 4 – 20mA current loop separator, which means
that it needs external power supply for its operation by means of an input and output current loop. The voltage drop at
the input terminals is proportional to the passing current IVST (voltage drop = 3.6V DC + IVST x 25Ω). The maximum
voltage drop is approximately 4.1V DC at 20mA. The output circuit requires an active power supply of min. 9V DC.
Zero and range correction can be performed within a +/-10% range by means of built-in trimmers for each channel
separately. For the double channel variant, two independent galvanic separations are installed in one device.
DESIGN
The device is built in a standard plastic box with a width of 22.5mm, designed for DIN rail mounting. A type label with
parameters and a label with a description of galvanic separation terminals are located on the side of the box. On the
bottom and top sides of the box (on the side with relevant terminals) there are two trimmers for zero and output signal
range correction – regulation within a +/-10% range (see figure 2). All signals are connected to a screw terminal block
on the bottom or top side of the box. For connection and description of terminals see Fig. 1. To each terminal, a wire
with a maximum cross-section of 2.5mm2 can be connected.
MOUNTING AND ACTIVATION INSTRUCTIONS
• Mounting
The galvanic separation is mounted on a standard DIN rail (the box is equipped with a universal fixture for several DIN
rail types).
• Connection
All signals are connected to a numbered terminal block on the top or bottom side of the box (fig. 1). The connection of
terminals is indicated on the side label. Output circuits of several galvanic separators can be connected in parallel to
one power supply unit at the same time. The number of connected devices is limited only by the output power of the
power supply unit.
• Putting into operation
The device is ready for operation with guaranteed parameters after the supply voltage has been connected and after
the necessary settling time (approx. 5 min) has passed.
• Operation and maintenance
The device does not require maintenance. Recommended functional parameters control 1x per year.
• Warranty and repairs
In case of breakdown or deviation from stated parameters, the device must be returned to the sales organization in
terms of warranty or after-warranty repair (see the warranty certificate).
1st CHANNEL
CONNECTION DIAGRAM
Terminals A, B …… input analogue signal
Terminals D, E …… output analogue signal
2nd CHANNEL
Terminals K, L …… input analogue signal
Terminals G, H …… output analogue signal
Fig. 1: Connection of the GO1 galvanic separation
terminal block.
P1 …… displacement ZERO
P2 …… displacement RANGE
Correction elements for the 1st channel
- from the A to F terminals side
Correction elements for the 2nd channel
- from the G to M terminals side
Fig. 2: Description of elements for the GO1 galvanic
separation output correction.
Fig. 3: Recommended connection of the GO1 galvanic
separation.
OPERATING CONDITIONS
• Working environment temperature:
• Power supply – input:
– output:
• Settling time:
• Service type:
0°C to +50°C
active signal 4 – 20mA (volt. drop = 3.6V DC+IVST+25Ω)
9…36V DC
approx. 5 min
permanent
TECHNICAL PARAMETERS (Ta = 23°C)
• Input signal range (IVST):
• Output signal range (IVÝST):
• Signal transfer characteristic:
• Signal transfer error:
• Temperature coefficient:
• Test voltage input - output, between channels:
• Operation voltage input - output, between channels:
• Protection:
• Dimensions:
• Weight:
4…20mA
4…20mA
linear
+/-0.2% of range
+/-0.2% of range at 1°C env. temperature change
3700Vef/1 min
3700Vef or DC
IP20
22.5 x 75 x 100mm (w x h x d)
approx. 150g
ORDER CODE
Prefix
a
b
c
GO1 a / b – c
No.
Input
4
Output
4
Version – number of channels
1
2
Name
Meaning
4 – 20mA
4 – 20mA
single-channel (1 x GS)
double-channel (2 x GS)
CUSTOMER INFORMATION
• This catalogue sheet serves as an accompanying document for the product
• Send your orders (device type specification see order code) or questions to the below-mentioned address.
Dodávky automatizace, spol. s r. o., 1. máje 34/120, 706 02 Ostrava-Vítkovice, Czech Republic,
tel.: +420 596 600 680, (111), fax: +420 596 600 116, (115), e-mail: mikroelektronika@daas.cz