OI-7530 XP Relayer


The Gen II WireFree Relayer OI-7530 is an explosion proof wireless secondary relay/alarm system specifically designed for use in conjunction with the Otis Instruments, Inc. Gen II WireFree Product Line. The OI-7530 can monitor up to 32 sensor assemblies via transmissions from an on-board 900MHz or 2.4GHz radio. Additionally, outputs are Modbus RS-485 and 3 dry-contact relays. 

Part Number Formula: OI-7530-[Radio Frequency]-[Power Supply]

Product Specifications

Operating Voltage: 12V to 35V DC or 120V/240V AC

Current Draw: 275 mA at 24 VDC (Monitor only with no additional items); 6.6 Watts Max

Compatibility: Otis WireFree Sensors

Channels: 32 (WireFree Sensor Assemblies)

Relays: 3 Dry-Contact with 4 Amp Fuses

Wired Output: RS-485 Modbus

Operating Temperature: -34°C to +70C


Hardware: One Year (Limited)


8″L x 8″W x 6″H

20.32 cm x 20.32 cm x 15.24 cm

Weight: 12.0 lbs (5.44 kg)

Enclosure Rating: Class I, Groups B, C and D; Class II, Groups E, F and G; Class III

Power: AC or DC

Radio Configuration: Gen II 900 MHz Radio, Gen II 2.4 GHz Radio

Enclosure: Aluminum Explosion Proof