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ANTENNA CHANGEOVER RELAY DRIVER
The Model ARD24 consists of twenty-four separate relay driving transistor switches. They are housed in a compact 1.75" high, 19" wide standard rack mount enclosure. All wiring is accessed through four rear connectors: J1 (CB Main), J2 (CB Standby), J3 (Remote Keying), and J4 (Relays).
The CB Main and the CB Standby lines are the two input controls for each channel. Keying (or "grounding") the CB Main line turns off the output transistor while keying the CB Standby line turns on the output transistor. In a typical application, the output transistor drives a relay which in turn is wired to control the antenna changeover relay. Channels 1, 2, 3, and 4 have additional input control lines for the purpose of Main and Standby Remote Keying (from Flight Service Station, for an example). The Remote Keying lines are connected to J3, a 25 pin D-sub connector. Both J1 and J2 are telco style 50 pin socket connectors. The output transistor lines for driving external relays are routed to J4, a telco style 50 pin plug connector.
Model ARD24 Antenna Changeover
Relay Driver summary specifications:
No. of Channels: |
24 with common ground return |
Controlling input: |
TTL compatible, Voltage Low to turn on logically latched output transistors |
Output sink current: |
0.5 A @ 1 VDC |
Output switching voltage: |
70 VDC maximum |
Connectors: |
J1, J2, J4 , 50 pin telco and J3, 25 pin D-sub connectors |
Power requirement: |
36-72 VDC, typically 48 VDC, 3 Watts |
Physical: |
3.5" x 19" x 13" (H, W, D), 6.7 pounds approximately |
Contact:Ways Unlimited Inc., Tel.
(978)635-9343 Fax (978)635-0275
EMail: Sales@waysunlimited.com