EQUIPMENT:  T1200-C 
PUBLICATION:  MARINEC-P-A 
  ISSUE No. & DATE:   3  02/14 
© 2014 Thorn Security Ltd      PAGE 59 of 67 
Registered Company: Thorn Security Ltd.  Registered Office: Dunhams Lane  Letchworth Garden City  Hertfordshire  SG6 1BE 
21. T1200-C Input and Output Specification 
Detection Zone Inputs  T1204 A1/A2/DC  T1216-C  T1232-C 
Specification 
Conventional open and short circuit fault monitored. 
Threshold current – Normal configuration: 
Short circuit threshold: ≥ 65.0mA. 
Evacuate Manual Call Point alarm threshold:  ≥ 37.92; <65.0mA. 
Detector/Alert Manual Call Point alarm threshold:  ≥ 10.78; <37.92mA. 
Quiescent: ≥ 1.63; <10.78mA. 
Open circuit: < 1.63mA. 
 
Threshold current – I.S. configuration [Using MTL5061/MTL5561 galvanic 
isolator]: 
Short circuit threshold: ≥ 27.78mA. 
Evacuate Manual Call Point threshold:  ≥ 20.92; <27.78mA. 
Detector/Alert Manual Call Point alarm threshold:  ≥ 8.5; <20.92mA. 
Quiescent: ≥ 1.63; <8.5mA. 
Cable requirements 
Max resistance of circuit loop: 40 Ohms. 
 
Ancillary Inputs  T1204 A1/A2/DC  T1216-C  T1232-C 
Zonal Fire Outputs for 
[Zones 1-4] 
Open collector, 
50mA 30V max input 
50mA 30V max input 
[available for zones 1-4 only] 
Non- fault monitored. 0 Volt I/P to activate. I/P sensitivity: 0-1k Ohm 
[Evac = Manual Fire Alarm 
Non- fault monitored. 0 Volt I/P to activate. I/P sensitivity: 0-1k Ohm 
Non- fault monitored. 0 Volt I/P to activate. I/P sensitivity: 0-1k Ohm 
Non- fault monitored. 0 Volt I/P to activate. I/P sensitivity: 0-1k Ohm 
Cable requirements 
Cable loop resistance <= 1k Ohm 
Earth Fault I/P 
Alarm threshold between 10k Ohm to 70k Ohm [dependant on circuit] between 
chassis and +ve or -ve line