Single Channel Controller 4001/4011

Sierra Monitor’s 4001/4011 controllers are single channel gas detection controllers that can be used with most industry standard two- or three-wire 4-20 mA or other standard voltage/current sensor transmitters. Both controllers provide the user with concentration displays, two independent adjustable alarm levels, and a fault relay.

The 4001 controller is housed in a NEMA 4X wall mount enclosure, with the option of a NEMA 7 explosion proof enclosure. The 4001 comes with an integral battery charger that can provide a trickle charge to an optional battery to provide reliable, continuous service. The LCD display on the controller shows the gas concentration or alarm setpoints.

The 4011 controller is in a 1/8 DIN panel mount enclosure. The front panel includes a 3 ½ digit LCD display, LEDS indicating three alarms, reset push button, and LEDs indicating the display selection.

Single Channel Controller 4001/4011

  • Two Adjustable Alarm Setpoints – Flexibly fit any user’s application needs
  • 4-20 mA or Standard Voltage/Current Input – Interface with industry standard sensor transmitters
  • Battery Backup Option – Insure continuous operation in the event of a power outage
  • Chart Recorder Output Signal – Continuously log concentration data

Specifications for Single Channel Controller 4001/4011

Input Signal

  • Standard: 4-20 mA
  • Factory Options: 0-5 V, 0-10 V, 0-20 mA

Input Resistance

  • The input loop resistance for the 4-20 mA loop is 100 ohm

Input Power

  • 4001: 18-30 VDC, Nominal 350 mA, max. 500 mA. Battery charger feature accepts 120 V AC
  • 4011: 14-30 VDC, Nominal 100 mA @ 24 VDC without sensor module, 180 mA @ 20 VDC with sensor module at 20 mA loop current

Alarm Levels

  • Two alarms, user adjustable, alarm levels
  • HiHi, HiLo, or LoLo

Alarm Configuration

  • Jumper selectable for Latching/Non-Latching. Jumper selectable for Alarming on GREATER or LESS than Alarm Level

Trouble Relay

  • Relay de-energizes when loop current is less than 3 mA or when power is removed

Relay Rating

  • SPDT Form C, 28 VDC @ 5 amp (fused), 120 VAC @ 4 amp

Alarm Acknowledge

  • 4001: External alarm reset available – resets latched relays. Alarm relays set but alarm status LEDs will track actual condition
  • 4011: Front panel push-button or external alarm rest will reset alarm relays programmed for Latching. Alarm relays reset but alarm status LEDs will track actual condition

Display

  • 3 ½ digit liquid crystal

Recorder Output

  • 0-2 VDC with RL = 1000 ohm minimum
  • Output proportional to display. Power available is 12 VDC @ 50 mA

Charger Output (4001)

  • 12 VDC Trickle Charge for battery back-up

Enclosure

  • 4001: NEMA 4X (NEMA 7 optional)
    • 11.5 x 8.0 x 6.9 in. (29.2 x 20.3 x 17.5 cm)
    • 11.2 lb. (5.1 Kg)
  • 4011: 1/8 DIN
    • 1.9 x 3.8 x 7.3 in. (4.8 x 9.6 x 18.5 cm)
    • 1.2 lb. (0.5 Kg)

How to Purchase the Single Channel Controller

Contact Us

You can directly contact us to receive a quote: