Features
Connects 24 industry-standard solid-state relay modules Three boards can be chained to provide 72 I/O connections Screw terminals for easy field wiring Standoffs
Description
The Sensoray Model 720RB Solid State Relay board provides an opto-coupled interface between low level computer signals and high power loads. Isolation is achieved by adding opto-coupled solid state relay modules. Up to twenty-four may be added.
Field Connections
Two screw terminals are available for each of the twenty-four loads. The terminals will accept 16 to 24 AWG stripped wire.
Computer Connections
Low-level signals from parallel adapters such as Sensoray’s 7421 are connected to the 720RB with either an 80-conductor round cable or 50-conductor flat cable. The 50-conductor cable follows industry-standard pinouts for solid state relay boards. The 80-conductor cable brings 72 I/O signals from high capacity I/O adapters (Model 620 ) to one 720RB. Forty-eight of these signals may be diverted to two additional 720RB’s so that 72 solid state relays may be controlled from a single adapter (Model 620).
Mounting Hardware
The standard 720RB is supplied with eight half-inch high threaded standoffs.
Software & Manuals
720RB Instruction Manual >> Released 1/18/02
Model 720RB Dimensions
Specifications
| Number of relay sockets | 24
|
| Maximum relay voltage | 220 Vrms |
| Maximum relay current | 5 amps |
| External voltage required to power input relays | 5 VDC |
| Wire sizes | 0.5 to 2.5 mm2 | 16 to 24 AWG |
