DSE2157 relay output expansion module
057-083 Issue 1 DSE2157 relay output expansion operator manual
5
3 SPECIFICATIONS
3.1 PART NUMBERING
2157 - 001 - 00
At the time of this document production, there are no variants of this product and there have been no
revisions of the module hardware.
3.1 POWER SUPPLY
Minimum supply voltage 8V continuous, 4V for up to 5 minutes.
Cranking dropouts Able to survive 0V for 50mS providing the supply was at least 10V before
the dropout and recovers to 5 volts afterwards.
Maximum supply voltage 35V continuous (protection to 60V)
Maximum operating
current
325mA at 12V, 152mA at 24V
Conditions: All relays energised.
Maximum standby current 70mA at 12V, 32mA at 24V
Conditions: All relays de-energised.
3.2 DSENET®
DSEnet is the interconnection cable between the host controller and the expansion module(s) and
must not be connect to any device other than DSE equipment designed for connection to the DSEnet.
Cable type Two core screened twisted pair
Cable characteristic impedance
120Ω
Recommended cable Belden 9841
Belden 9271
Maximum cable length 1000m (1km) when using Belden 9841 or direct equivalent.
500m (0.5km) when using Belden 9271 or direct equivalent.
DSEnet topology Bus with no stubs (spurs)
DSEnet termination
120Ω. Fitted internally to host controller. Must be fitted externally
to the ‘last’ expansion module by the customer .
Maximum expansion modules Refer to host controller documentation
NOTE : As a termination resistor is internally fitted to the host controller, the host controller
must be the ‘first’ unit on the DSEnet. A termination resistor MUST be fitted to the ‘last’ unit on
the DSEnet. For further details, please see the section entitled ‘typical wiring diagram’
elsewhere in this document.
Product type
DSE 2157
input
expansion
module
2157
Variant
Standard
product
00
Hardware revision
Revision 1
001
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