A range of three din rail mounted fully enclosed 0-10VDC BMS modules providing a volt free digital output from a 0-10VDC BMS signal. These modules are an alternative to standard BMS low coil consumption “SRMV” relays which have a coil consumption of <20mA. On occasions with some BMS systems there is insufficient power in the 0-10VDC signals even to drive a low coil consumption “SRMV” relay. The Foxtam Controls modules have a consumption of <0.5mA with regards to the 0-10VDC signal, the power to drive the output relay is taken from a separate auxiliary supply of 24V AC/DC, the 0-10VDC input signal and the 24V auxiliary supply shares a common 0V point (see wiring diagram below), it should also be noted that the module is polarity sensitive. A red LED indicates the output relay is energised.
YR-1RM This module has a fixed non adjustable setpoint of 5VDC at which point the SPCO output relay will energise indicated by a red LED. The de-energisation point is a fixed hysteresis of 5% (0.25V), therefore 4.75VDC. At all times the 24V AC/DC auxiliary supply must be present for the module to operate.
YR-1RM-A This module has an adjustable switching point of between 2-10VDC, adjustment is via a potentiometer on the front of the module. On reaching the selected setpoint the SPCO output relay will energise indicated by a red LED. The de-energisation point is a fixed hysteresis of 5% of the setpoint selected. At all times the 24V AC/DC auxiliary supply must be present for the module to operate.
YR-1RM-AS Exactly as the YR-1RM-A but with the addition of an OFF/AUTO/ON denoted selector switch on the module. Set to AUTO the module behaves as a YR-1RM-A. In the ON position the relay output will be forced on even if the 0-10VDC input signal has not reached the selected setpoint. Set to OFF the output relay can be forced to de-energise even if the 0-10VDC input signal is above the selected setpoint. At all times the 24V AC/DC auxiliary supply must be present for the module to operate.
Auxiliary Supply: 24V AC/DC
Supply Tolerance: +/-15%
Max Power Consumption: 26mA
BMS Input Signal
Signal input: 0-10VDC
Input impedance: 22K Ohms
Max Hysteresis: 5% fixed of the setpoint
Output contact: SPCO 8 Amps / 250V AC1
Operate time: 15mSec max
Release time: 8mSec max
Max switching voltage: 250VAC, 30VDC
Mechanical life: 30 Million op
Operating Temperature: -20°C to +65°C
Storage Temperature: -20°C to +65°C
Humidity: 95% Rel H max
Isolation Voltage I/P-O/P: 1500VDCfor 1 min
CE marked: Yes
Housing material: Polycarbonate, Auto extinguishable to UL 94 V-0
RoHS Compliant: Yes
YR-1RM 24V AC/DC
(FIXED Trip Level) (NO Manual Override)
YR-1RM-A 24V AC/DC
(ADJUSTABLE Trip Level) (NO Manual Override)
YR-1RM-AS 24V AC/DC
(ADJUSTABLE Trip Level) (YES Manual Override)
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