53A-356 Relay Switching Card
• Provides 8 independently controlled DPDT relays
• Sustains up to 100 switchings per second
• Individual relays may be randomly opened or closed, or all relays on the card may be opened or closed as a group
• Single-line thermal offset of less than 10 microvolts
The 53A-356 Relay Switching Card provides 8 independently controlled double-pole, double-throw relays which can sustain one hundred switchings per second while providing a minimum dwell time of four milli-seconds. Any relay may be randomly opened or closed by transmitting ASCII characters from the system controller. The maximum switching rate may be set at 100 operations per second, or at 20 operations per second for improved relay life in high current switching applications. All six wires of each relay are available at the front edge connector. Diagnostics are provided by LED indicators.
Eight LEDs provide Built-ln-Test Equipment (“BITE”). An individual LED will be lit when its corresponding relay is closed.
8 each DPDT relays brought out to front-edge connector as DPDT.
Maximum Switching Power, 1000VA ac, 192W dc.
Maximum Switching Voltage, 250V ac, 48V dc.
Maximum Switching Current, 4A (<20 o.p.m.)
Dwell time at max switching rate is 4 msec minimum.
Signal Path Specifications:
Single-line Thermal Offset less than 10 microvolts.
Initial Signal Path Resistance. less than 300 milliohms.
Signal Path Resistance at End of Full Load Life. less than 350 milliohms.
Insulation Resistance greater than ten gigohms between all insulated parts.