Analogue Dual Relay Controller CHQ-DRC2(SCI)

Model CHQ-DRC2(SCI) is a Dual Relay Controller designed to provide two generalpurpose relay outputs, each output can be driven separately for control of such devices as dampers or for control of plant and equipment shutdown. The monitored input can be used for local power supply fault monitoring or as a general-purpose input.

The unit is also available as a DIN Rail mountable version; both models feature an integral short-circuit isolator. The CHQ-DRC2(SCI) utilises simple DIL switches for reliable addressing. A back box is also available (CHQ-BACKBOX) which, when used in conjunction with the CHQ-DRC2(SCI), increases the IP rating to IP65.

  • Loop powered
  • Single loop address
  • 2 Independently controlled changeover relays
  • Relays contact rated at 30 V dc at 1 A
  • Auxiliary monitored input • DIN-Rail version available
  • Both models feature an integral short-circuit isolator
  • Both models approved by LPCB
Specification
Order codes*1 CHQ-DRC2(SCI) (module with SCI)
CHQ-DRC2/DIN(SCI) (DIN module with SCI)
Operating voltage 17 - 41 V dc
Low Power Mode (0.75s) 170 A
Quiescent current 300 A
Current consumption 22 mA ± 20 % (polling)
Current in short-circuit 8 mA
Maximum short-circuit current (Loop) 1 A
Relay Contact Rating 30 V dc max, 1 A (resistive load)
Input E.O.L. resistor 10 k, ±5%, 0.25 W
Input threshold level ON=470 Ω, Short cct <50 Ω, Open cct >100 KΩ
Operating Temperature Range -10 °C to +50 °C
Storage Temperature Range -30 °C to +60 °C
Maximum Humidity 95%RH Non Condensing (at 40°C)
Weights (g) & Dimensions (mm) CHQ-DRC2(SCI) - 343 - L=157 x W=127 x D=35
CHQ-DRC2/DIN(SCI) - 124 - L=119 x W=108 x D=24
Colour and enclosure material CHQ Module & CHQ-BACKBOX White ABS, DIN Module Green ABS, Module Lid Semi-Opaque Black ABS as standard (white version – CHQ-LID(WHT) also available)
Specification

Order codes*1

CHQ-DRC2(SCI) (module with SCI)

CHQ-DRC2/DIN(SCI) (DIN module with SCI)

Operating voltage

17 - 41 V dc

Low Power Mode (0.75s)

170 A

Quiescent current

300 A

Current consumption

22 mA ± 20 % (polling)

Current in short-circuit

8 mA

Maximum short-circuit current (Loop)

1 A

Relay Contact Rating

30 V dc max, 1 A (resistive load)

Input E.O.L. resistor

10 k, ±5%, 0.25 W

Input threshold level

ON=470 Ω, Short cct <50 Ω, Open cct >100 KΩ

Operating Temperature Range

-10 °C to +50 °C

Storage Temperature Range

-30 °C to +60 °C

Maximum Humidity

95%RH Non Condensing (at 40°C)

Weights (g) & Dimensions (mm)

CHQ-DRC2(SCI) - 343 - L=157 x W=127 x D=35

CHQ-DRC2/DIN(SCI) - 124 - L=119 x W=108 x D=24

Colour and enclosure material

CHQ Module & CHQ-BACKBOX White ABS, DIN Module Green ABS, Module Lid Semi-Opaque Black ABS as standard (white version – CHQ-LID(WHT) also available)

LYFE