0-10VDC BMS RELAYS WITH AN AUXILIARY SUPPLY

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-S Exactly as the YR-1RM 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. In the ON position the relay output will be forced on even if the DC input signal has not reached 5VDC. Set to OFF the output relay can be forced to de-energise even if the DC input signal is above 5VDC. 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.

Input Supply

Auxiliary Supply: 24V AC/DC

Supply Tolerance: +/-15%

Max Power Consumption: 26mA

BMS Input Signal

Signal input: 0-10VDC

Input impedance: 22K Ohms

Consumption: 0.5mA

Max Hysteresis: 5% fixed of the setpoint

Relay Output

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

General

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

Standards Applied:
EN60950-1
EN6100-6-3
EN61010-1

Housing material: Polycarbonate, Auto extinguishable to UL 94 V-0

RoHS Compliant: Yes

Type

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-S 24V AC/DC
(FIXED Trip Level) (YES Manual Override)

YR-1RM-AS 24V AC/DC
(ADJUSTABLE Trip Level) (YES Manual Override)