Model 720RB | Solid State Relay Board
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
  • Available with DIN rail mounting
  • (720RBDIN) or standoffs

The 720RB is a Legacy product and is not recommended for new designs. The lead time for the 720 may be as long as 12 weeks and may require a minimum quantity order. Please call for availability.


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. Model 720RBDIN is supplied with mounting hardware for DIN rails.

Software and Manuals

720RB Instruction Manual Released 11/8/02

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

Images and Mechanical Drawings

Model 720RB Dimensions

Prices


Model 720RB Solid State Relay Board Please call for availability
Model 720RBTDIN 720RB with DIN hardware Please call for availability
Model 7501C 18” flat cable for use with 720RB Qty. 1 $17 Qty. 2-9 $15
Model 7501C1 1 meter flat cable for use with 720RB Qty. 1 $30 Qty. 2-9 $27
RELAY-G4IDC5 10 -32 VDC Input relay Qty:1 $17 Qty:2-9 $15
RELAY-G4ODC5 5 amp DC output relay Qty:1 $17 Qty:2-9 $15
RELAY-G4OAC5 280 VAC, 3 A output Qty:1 $17 Qty:2-9 $15
RELAY-G4IAC5A 280 VAC input Qty:1 $17 Qty:2-9 $15