User Manual

Model 500-512000-000
Alarm Acknowledge/Silence Circuit
Engineered Gas Detection System Accessory
Operator's Instruction Manual Rev. 1
1.0 D
ESCRIPTION
Detcon PN 500-512000-000 is designed for use in engineered gas detection systems where an alarm
acknowledge/ silence function is required. The all solid state circuit is powered by 24 VDC and is capable
of receiving inputs from up to 8 alarm relays and triggering a common relay output. Additional circuits
may be series linked to accommodate additional inputs in 8 channel increments.
2.0 P
RINCIPLE OF
O
PERATION
In operation, a dry contact closure input to any one of the 8 channels triggers the common alarm output
relay. The alarm output relay is held in the latched position until an external normally open momentary
contact switch is used to release the alarm output relay. Once acknowledged or reset, the input that created
the original alarm must clear before it can re-trigger the output relay. Any of the other inputs will re-trigger
the output relay. The circuit is most commonly used as an audible silence device.
3.0 S
PECIFICATIONS
Power Requirements: 24 VDC
Dimensions:
Inputs: 8 dry contacts
Output: 5 amp 30 VDC, Form "C" relay
Shipping address: 3200 A-1 Research Forest Dr., The Woodlands, Texas 77381
Mailing address: P.O. Box 8067, The Woodlands, Texas 77387-8067 ❏ Phone: [phone] ❏ Fax: [phone]
detcon inc.
1 2 3 4 5 6 7 8
ACKNOWLEDGE
RESET
TRIGER IN
NO
NC
COM
RELAY
CONTACTS
24 VDC INPUT
TRIGER OUT
24 VDC OUT
CONTACT CLOSURE INPUTS