These relay modules provide 4, 8, or 16 individual relays controlled over an RS485 serial bus using the Modbus RTU protocol.
The relays can be either mechanical Finder 46.61-024-DC relays or Autonics SRS1 solid state relays. The relay module can be populated with a mixture of mechanical relays or solid state relays to suit the loads being switched.
The module is powered from an external 24V DC supply.
Modbus RTU comms
RS485 9600 or 19200 Baud, no parity 8 bit 1 stop bit
8 & 16 relay modules
24V dc supply
DIN rail mounting
Plug in relays
Finder 46.61 250VAC 10A CO mechanical relays
Note. 10A fuse/fuse holder limited
RM-4WAY-MB-24VDC:
4 individual relays with fuse holders
RM-8WAY-MB-24VDC:
8 individual relays with fuse holders
RM-16WAY-MB-24VDC:
16 individual relays with fuse holders
All Modules:
* NOTE fuses not supplied with the unit
Either Finder 46.61-024-DC mechanical relays or Autonics SRS1 solid state relays
46.61-024-DC relays : 250VAC 10A SPCO (fuse/fuse holder limited)
SRS1-A1205 relays : 24-240VAC 5A NO
SRS1-A1D102 relays : 5-100VDC 2A NO
Supply Input
RM-4WAY-MB-24VDC:
nominal 24V dc, operating range 18V to 30V dc
approx. 20mA + 20mA/relay, 100mA with all 4 relays on
RM-8WAY-MB-24VDC:
nominal 24V dc, operating range 18V to 30V dc
approx. 20mA + 25mA/relay, 225mA with all 8 relays on
RM-16WAY-MB-24VDC:
nominal 24V dc, operating range 18V to 30V dc
approx. 20mA + 25mA/relay, 450mA with all 16 relays on
Isolation
2kV isolation between the supply and RS485 bus
Temperature
Operating : -10°C to +20°C to +50°C
Storage : -20°C to +70°C
EMC Compliance
AS/NZS 61000.6.3:2012
Housing
DIN rail mounted polyamide, flame retardant UL 94 V0.
Terminals
Spring steel clamp, tin plated copper alloy terminal
: up to 2.5mm2 stranded conductor
: wire stripping 9mm
Carrel Electrade RM Series Modbus Interface Relay Modules
RM Series Modbus Interface Relay Modules
Description
These relay modules provide 4, 8, or 16 individual relays controlled over an RS485 serial bus using the Modbus RTU protocol.
The relays can be either mechanical Finder 46.61-024-DC relays or Autonics SRS1 solid state relays. The relay module can be populated with a mixture of mechanical relays or solid state relays to suit the loads being switched.
The module is powered from an external 24V DC supply.
Note. 10A fuse/fuse holder limited
Selectable 9600 (default) or 19200 Baud 8 bit no parity 1 stop bit
03 read holding registers
05 write discrete output
06 write single register
15 write multiple outputs
16 write multiple registers
4 individual relays with fuse holders
RM-8WAY-MB-24VDC:
8 individual relays with fuse holders
RM-16WAY-MB-24VDC:
16 individual relays with fuse holders
All Modules:
* NOTE fuses not supplied with the unit
Either Finder 46.61-024-DC mechanical relays or Autonics SRS1 solid state relays
46.61-024-DC relays : 250VAC 10A SPCO (fuse/fuse holder limited)
SRS1-A1205 relays : 24-240VAC 5A NO
SRS1-A1D102 relays : 5-100VDC 2A NO
nominal 24V dc, operating range 18V to 30V dc
approx. 20mA + 20mA/relay, 100mA with all 4 relays on
RM-8WAY-MB-24VDC:
nominal 24V dc, operating range 18V to 30V dc
approx. 20mA + 25mA/relay, 225mA with all 8 relays on
RM-16WAY-MB-24VDC:
nominal 24V dc, operating range 18V to 30V dc
approx. 20mA + 25mA/relay, 450mA with all 16 relays on
Storage : -20°C to +70°C
: up to 2.5mm2 stranded conductor
: wire stripping 9mm
RM-4WAY-MB-24VDC Datasheet
DownloadDatasheet for RM-4WAY-MB-24VDC module
RM-8WAY-MB-24VDC Datasheet
DownloadDatasheet for RM-8WAY-MB-24VDC module
RM-16WAY-MB-24VDC Datasheet
DownloadDatasheet for RM-16WAY-MB-24VDC module