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D1020
- SIL 2 Powered Isolating Driver Smart-Hart compatible
G.M. International ISM0012-14
Operation
D1020 isolates and transfers a 0/4-20 mA signal from a controller located in Safe Area/Non Hazardous Locations to an I/P converter, displays or similar equipment located in Hazardous
Area/Hazardous Locations. The circuit allows bi-directional communication signals for smart/hart converters. In the 4-20 mA input range, a field open circuit presents a high impedance to
the control device. A “POWER ON” green led lits when input power is present.
Installation
D1020 series are powered isolating driver smart/hart compatible housed in a plastic enclosure suitable for installation on T35 DIN Rail according to EN50022.
D1020 unit can be mounted with any orientation over the entire ambient temperature range, see section “Installation in Cabinet” and "Installation of Electronic Equipments in Cabinet"
Instruction Manual D1000 series for detailed instructions. Electrical connection of conductors up to 2.5 mm² are accommodated by polarized plug-in removable screw terminal blocks
shich can be plugged in/out into a powered unit without suffering or causing any damage
(for Zone 2 or Division 2 installations check the area to be nonhazardous before
servicing)
. The wiring cables have to be proportionate in base to the current and the length of the cable. On the section “Function Diagram” and enclosure side a block diagram identifies
all connections. Identify the number of channels of the specific card (e.g. D1020S is a single channel model and D1020D is a dual channel model), the function and location of each
connection terminal using the wiring diagram on the corresponding section, as an example:
Connect 24 Vdc power supply positive at terminal “3” and negative at terminal “4”.
For Model D1020D connect 24 Vdc power supply positive at terminal “7” and negative at terminal “8” for channel 2.
For Model D1020S connect positive input of channel 1 at terminal “1” and negative input at “2”.
For Model D1020D in addition to channel 1 connections above, connect positive input of channel 2 at terminal “5” and negative input at “6”.
For Model D1020S connect output at terminal “14” for positive and “15” for negative.
For Model D1020D in addition to channel 1 connections above, connect terminal “10” for positive and “11” for negative on channel 2.
Intrinsically Safe conductors must be identified and segregated from non I.S. and wired in accordance to the relevant national/international installation standards
(e.g. EN/IEC60079-14 Electrical apparatus for explosive gas atmospheres - Part 14: Electrical installations in hazardous areas (other than mines), BS 5345 Pt4, VDE 165,
ANSI/ISA RP12.06.01 Installation of Intrinsically Safe System for Hazardous (Classified) Locations, National Electrical Code NEC ANSI/NFPA 70 Section 504 and 505,
Canadian Electrical Code CEC), make sure that conductors are well isolated from each other and do not produce any unintentional connection.
The enclosure provides, according to EN60529, an IP20 minimum degree of mechanical protection (or similar to NEMA Standard 250 type 1) for indoor installation, outdoor installation
requires an additional enclosure with higher degree of protection (i.e. IP54 to IP65 or NEMA type 12-13) consistent with the effective operating environment of the specific installation.
Units must be protected against dirt, dust, extreme mechanical (e.g. vibration, impact and shock) and thermal stress, and casual contacts. If enclosure needs to be cleaned use only a
cloth lightly moistened by a mixture of detergent in water.
Electrostatic Hazard: to avoid electrostatic hazard, the enclosure of D1020 must be cleaned only with a damp or
antistatic cloth.
Any penetration of cleaning liquid must be avoided to prevent damage to the unit. Any unauthorized card modification must be avoided. According to EN61010, D1020
series must be connected to SELV or SELV-E supplies.
Start-up
Before powering the unit check that all wires are properly connected, particularly supply conductors and their polarity, input and output wires, also check that Intrinsically Safe conductors
and cable trays are segregated (no direct contacts with other non I.S. conductors) and identified either by color coding, preferably blue, or by marking. Check conductors for exposed
wires that could touch each other causing dangerous unwanted shorts. Turn on power, the “power on” green led must be lit, output signal should be corresponding to the input from the
controller. If possible change the input value and check the corresponding Hazardous Area output.
