Advertisement
RSE-3A2
Rev. 4-18
Advantages
Reduced cost when compared to equivalent vital
relay control.
Compatible with existing relay rack mounting.
Eliminates various switch machine electro-mech.
relays
Can simultaneously operate two high voltage
switch machines
Interfaces to MicroLok II or non-Hitachi Rail STS
USA interlocking controllers
Built-in overload and short circuit protection in SML
unit.
PN-150 style relay for fast installation
Relay's LEDs indicate energy state
Application
The SML-110 Switch Machine Lock and the PN-
150SSR Solid State Relay replace the vital relays
normally used to control switch machines. They can
be installed at microprocessor-based or conventional
vital relay interlockings. The SML -110 unit can
sustain a short circuit on its output terminals without
suffering any damage. Overload protection is
provided with a built-in timer. The timer will shut off
the SML-110 output after 18 seconds if switch
correspondence is not achieved. Correspondence
normally occurs well before 18 seconds, and, that
time, the switch machine contacts interrupt the motor
current.
RSE-3A2, p. 2
SML-110/PN-150SSR Circuit Application
If preferred, traditional overload protection methods
can also be used. A processor based interlocking
controller can be programmed to shut off the SML-110
after a predetermined time. For a relay-based
interlocking applications, an overload relay can be
used.
A single switch requires one SML-110 unit and one
PN-150SSR Solid State Relay. In the case of a
double crossover, the same SML-110 unit can be
used for all machines at the location. One PN-
150SSR relay is required for each switch.
Designed and manufactured for mounting in a
standard relay rack, the SML-110 Switch Lock
occupies three PN-150B relay spaces and nests with
other relays.
The PN-150SSR is only used with the SML-110 unit.
This relay requires two basic inputs, including the
voltage from the SML-110 and a second input, which
is either the normal or the reverse switch request. The
input can originate from relay contacts or a vital
interlocking processor such as MicroLok II.
Specifications
SML-110
Input Voltage:
Output Voltage:
Input-to-Output Isol.:
SML-110 Switch Lock and
PN-150SSR Solid-State Relay
90 to 130 Vac; 90 to 140
Vdc.
125 Vdc (current limit to
23A).
2000 Vrms
Advertisement
