MTL MTL5995 Fieldbus Power Supply

MTL MTL5995 Fieldbus Power Supply

MTL MTL5995 Fieldbus Power Supply

MTL MTL5995 Fieldbus Power Supply

Feature

• Straightforward ‘clip-on’ DIN-rail
mounting
• Low cost per fieldbus segment
• High packing densities
• Simplified installation and
maintenance using plug-in connectors

MTL MTL5995 Fieldbus Power Supply

Description

The MTL5995 is a general purpose power supply unit designed for use in 31.25kbit/s (H1) fieldbus systems. It complies with the requirements of Fieldbus Foundation™ power supply Type 131† (non-IS supply intended for feeding an IS barrier).
To comply with fieldbus standards, each bus must be terminated at both ends. MTL’s FBT1-IS, F100 or FCS-MBT fieldbus terminators can be supplied for this purpose; or its switch-enabled, internal terminator can be used for installations in which an MTL5995 is located at one end of the fieldbus trunk.
When designing a fieldbus segment the total current consumption of the fieldbus devices should be calculated for normal operation. This should be within the range of the published design current for the power supply. 

For the MTL5995 power supply, the current limit is at least 20mA higher than the maximum design current. This provides a margin for inrush current when a new device is added to
the network. Therefore, with a fieldbus loaded with its maximum design current, a fieldbus
device can be disconnected and reconnected without the risk that other devices on the bus
will reset.
The MTL5995 clips quickly onto DIN rail, so it is compatible with the industry-standard mounting system. Wiring is simplified by a single, secured, plug-in fieldbus connector (MTL5995-PS), or a pair of plug-in fieldbus connectors (MTL5995) and a power plug which accepts a power bus; all leading to quicker insertion, fewer wiring errors and trouble-free, tidier installations.
MTL MTL5995 Fieldbus Power Supply

Specification

OUTPUT
Voltage
19V±2%
<2Ω dc impedance
Design current
0 to 350mA,

Current limit
>370mA
Output ripple
Complies with clause 22.6.2 of the fieldbus standards† for output
current >10mA.
Internal termination
Selected by a switch in the base of the unit.
INPUT
Supply voltage
20 to 30V dc –20°C to +60°C
Power requirement, with 350mA output load
420mA typical at 24V
370mA typical at 30V
520mA typical at 20V
Power dissipation within unit, with 350mA output load
3.4W typical at 24V
4.5W maximum at 30V
Note: To allow adequate heat dissipation under all likely thermal conditions,
it is recommended that the MTL5995-PS is installed on DIN-rail with
10mm clearance from any adjacent unit. 10mm DIN-rail module spacers
(part no. MS010) are available from MTL for this purpose.
LED indicator
Green: one provided for power indication
Isolation
250V rms between fieldbus and power supply terminals
Location of units
Safe area
Terminals
Accommodate conductors with cross-section of 0.14 to 2.5mm2,
stranded or single-core
Mounting
On 35mm (top hat) rail to EN 50022–35 x 7.5; BS 5584;
35 x 27 x 7.3 DIN 46277
Ambient temperature limits
–20 to +60°C (–6°F to +140°F) operating
–40 to +80°C (–40°F to +176°F) storage
Humidity
5 to 95% relative humidity
Weight
110g approx
MTL MTL5995 Fieldbus Power Supply