* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download DMSSCT Shelf-Mount Solid-State Code Transmitter
Survey
Document related concepts
Transistor–transistor logic wikipedia , lookup
Immunity-aware programming wikipedia , lookup
Operational amplifier wikipedia , lookup
Integrating ADC wikipedia , lookup
Power MOSFET wikipedia , lookup
Spark-gap transmitter wikipedia , lookup
Valve RF amplifier wikipedia , lookup
Schmitt trigger wikipedia , lookup
Current mirror wikipedia , lookup
Resistive opto-isolator wikipedia , lookup
Power electronics wikipedia , lookup
Voltage regulator wikipedia , lookup
Surge protector wikipedia , lookup
Crossbar switch wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Radio transmitter design wikipedia , lookup
Transcript
Vital Relays and Timers Ansaldo STS USA (Formerly known as Union Switch & Signal) RSE-4C3 Rev. 7-05 DMSSCT Shelf-Mount Solid-State Code Transmitter For decades, electromechanical code transmitters have been used to generate the pulses of coded track circuits. While these transmitters are reliable performers, their precise, somewhat complex mechanisms require periodic inspection and maintenance. ASTS USA has developed a more cost-effective, yet equally reliable alternative. The DMSSCT is a solid-state option for the ASTS USA shelf type DM mechanical code transmitter. This relay also provides a costeffective alternative to previous shelf-mount solidstate code transmitters. General Description The new shelf-mounted DMSSCT solid state code transmitter is designed to be a functional electronic replacement for the ASTS USA DM electromechanical and previous DM solid-state code transmitters (“cookie jar” style). This relay generates standard code rates of 75, 120 and 180 codes per minute (CPM) and is housed in an ASTS USA W-400 transformer style enclosure with top-mounted AREMA (AAR) wiring terminals. Internal electronics are divided between two printed circuit boards (PCBs) - a Timing PCB and an Output PCB. The Timing PCB generates timing signals used to actuate the switching circuits at the designated rate, while the Output PCB contains the switching circuitry. The DMSSCT contains four pairs of output switches. Each switch pair has three connections - front (F), back (B), and heel (H). The number associated with each connection denotes the switch pair. For example, “1F” is the front connection and “1B” is the back connection of the switch pair “1.” Functionally, the relay is designed to switch the heel (H) connection between the front (F) and back (B) connections at a specific rate. Four back switches are actuated simultaneously by the front output controller. Four back switches are actuated simultaneously by the back output controller. Since the DMSSCT is a solid state replacement for an electromechanical unit, its circuits are designed to emulate the toggling, or pendulum action, of relays. With a code transmitter relay, an electromagnet attracts and then releases an armature - the resulting motion alternately closes and opens an opposing pair of contacts. As with a pendulum, there is a neutral To order, call 1-800-652-7276 e-mail: [email protected] position where neither set of contacts is closed, consequently, the “on” time for each (front and back) circuit is less than 50% of one full on-off cycle. Dielectric strength of the unit is 2000 Vac rms between all external isolated connections and case, except across open switches which are limited by Transzorb or metal oxide varistors (MOV) protection. Maximum voltage is determined by a Transzorb to protect the DC switches from excessive voltage spikes when operating code-following relays. For the AC version, a 150 Vac rms MOV is similarly used anticipating 120 Vac rms as the source voltage. Advantages • • • • • • Direct option for previous ASTS USA DM series shelf relays. Provides all required code rates. No periodic inspection required. Easy reconnection from “cookie jar” unit top wiring to W-400 style wiring No rewiring of external circuits required. Protected against reversed voltage. www.ansaldo-sts.com RSE-4C3, p. 1 Ansaldo STS USA DMSSCT Shelf-Mount Solid-State Code Transmitter (Formerly known as Union Switch & Signal) RSE-4C3 Rev. 7-05 Outputs: 4 pairs of front-heel-back (Form C) Temperature: -40°C to +70°C (-40°F to +158°F) Low Voltage: AC/DC 2.5A, 32 Vdc maximum or 22 Vac rms maximum, “on” resistance = 0.5 Ohms (short circuit protected). Humidity: Non-condensing at 0 to 95% humidity High Voltage: AC only, 4.0 A, 150 Vac rms maximum, AC only. External 6A fuse required for short circuit protection. Voltage drop across switch = 1.25 Vac rms, independent of current. Ordering and Additional Technical Information Specifications Power Input Voltage: 8 to 16 Vdc (reverse voltage protected operating range) Current Consumption: 100mA maximum Output Switch Rating: • • Refer to ordering tabulation for DMSSCT part numbers. Request ASTS USA Service Manual SM-8524-A for additional information. DMSSCT Code Transmitters Order No. N40701601 Code Rate (CPM) 72 Contact Config. 4F/4B Contact Voltages L.V. N40701602 72 4F/4B H.V. N40701603 72 N40701604 123 2F/2B 2F/2B 4F/4B L.V.: #1, #2 H.V.: #3, #4 L.V. N40701605 123 4F/4B H.V. N40701606 123 N40701607 184 2F/2B 2F/2B 4F/4B L.V.: #1, #2 H.V.: #3, #4 L.V. N40701608 184 4F/4B H.V. N40701609 184 2F/2B 2F/2B L.V.: #1, #2 H.V.: #3, #4 RSE-4C3, p. 2 DM ElectroMech. Relay Replaced N242040 N242041 N242046 N276412 N242042 N242043 N242045 DM SolidState Relay Replaced N32001507 N32001504 -- N221553 N221558 N221554 N221556 N221560 N32001506 N221552 N221559 N221555 N221557 N221561 N32001505 N32001503 -- N32001502 N32001501