Transcript
Ansaldo STS USA
Vital Relays and Timers
RSE-4C10 Rev. 7-05
CD SS Shelf Mount Code Follower Relay - Track Shelf-mounted electro-mechanical code-following track relays have been used for years to receive pulses of coded energy. While these code followers have proven to be reliable performers, their mechanisms require periodic inspection and maintenance. ASTS USA has developed a more cost-effective yet equally dependable alternative: the CD SS plug-in solid-state code follower track relay. By using solid-state electronics to replace the mechanisms of the equivalent ASTS USA CD style electro-mechanical track code follower, this new relay eliminates the need for field adjustment and calibration - while delivering the proven performance and historical reliability of the traditional shelf-mount units.
General Description The CD SS track relay is a code following relay comprised of two circuit boards, including one control board and one output or “contact” board containing the solid state switches. The two boards are housed in a steel housing similar to the ASTS USA W-400 transformer. Connections to a unit are made via standard AREMA (AAR) terminals available on top of the unit. The CD SS track relay operates as a 4-front, 4-back relay only.
energy source must be connected. Request ASTS USA Service Manual SM-9278 for additional application details. Advantages
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No periodic inspection needed. Eliminates the need for field adjustment and calibration. Solid-state option for electro-mechanical counterparts.
On the output board, one solid state switch is used as the front contact, and one is used as a back contact for each of the four sets of contacts. All switches are normally open devices, therefore to emulate a back contact, apply steady energy is applied to one set of terminals on the upper terminal block to enable the back contact switches. Applying energy to another set of terminals activates the front contact switches and opens the back contact switches. In the event that back contacts are not required, it is still necessary to apply steady energy to this type of track relay.
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The internal circuit boards are designed for low voltage applications. The unit can support load currents to 2.5 amperes to 30 Vdc, 22 volts Vrms AC. Breakdown voltage across a normal-reverse contact set is limited by the surge protection ratings of 34 Vdc for low-voltage contacts.
Contact Load Ratings: Hold Current: 0.06 to 2.5 A
The main difference between the CD SS track relay and its electromechanical counterpart is that a steady
To order, call 1-800-652-7276
No rewiring of existing circuits required. No requirement for extra rack spacing (no magnetic effects)
Specifications Operating Voltage:
8 to 16 Vdc (8 Vdc minimum) Ripple: Limited to instananeous voltage drop to not less than 8V Voltage: 12 to 230 Vrms
Contact Protection:
Up to 230V Short circuit protection: Not provided internally (external fusing required)
www.ansaldo-sts.com RSE-4C10, p. 1
Ansaldo STS USA
CD SS Shelf Mount Code Follower Relay - Track
RSE-4C10 Rev. 7-05
Specifications (cont’d)
Ordering Information
Isolation:
Steady power source and coded inputs: 1000V rms.
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Contacts and inputs: 1500 Vrms
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Breakdown Voltage:
Across front/back set: Limited by 34V surge protection
Operating Temp.:
-40°C to +70°C (-40°F to +158°F)
Unit Dimensions:
9.25”H x 4.56”W x 6.0”L (23.5 cm H x 11.6 cm W x 15.2 cm L)
Order No. N40700408 N40700409
RSE-4C10, p. 2
Refer to ordering tabulation below for CD SS biased track relay part numbers. Request ASTS USA Service Manual SM-9278 for additional information.
CD SS Shelf Mount Code Follower Relay - Track Recommended Op. Current Ohms Contacts Contact Application 0.82A 0.3 4FB L.V. 4FB L.V. AC/DC #1, 2, 3, 4 0.82A
0.3
1FB H.V. #1 1 FB H.V. AC Only 3FB L.V. #2, #3 3FB L.V. AC/DC, #2, #3 and #4 and #4 Note (1): Replaces N216371, N232752, N232753, N275968 Note (2): Replaces N232763
Old CD Relay Replaced (1) (2)
