RISCO Group Gardtec 490X - Manual (Page 100)

Page 99
GT490X Engineer’s Reference Guide
Output Terminals and Connectors
RS485
Shares AUX 12V supply, (protection 1.1A resettable thermal fuse).
Speaker
Combined impedance of speakers connected MUST NOT BE LESS THAN 16 ohms.
Speaker + terminal is AUX12V, speaker –ve is drive output.
PGM 1 and PGM2
Internal 1K pull-up to AUX12V, internal 22ohm series resistor to output. Maximum
current sink 50mA.
(Note that due to the 22ohm series resistor, with 50mA sink the output will be at
appronimately 1.1V).
AUX12V
1.1A resettable thermal fuse, AUX12V also feeds RS485, Speaker, Bell and Strobe.
This pair of terminals supply the + and - supply for the detectors.
Bell / Strobe
This pair of terminals are the output for the Bell / Strobe. The negative terminal is
switched during an alarm period. Strobe –ve switch to 0V, max current for switch is 1A.
Shares AUX 12V supply (protection 1.1A resettable thermal fuse).
Keypad
0V + 12V Connections. Independently fused 12V supply, protection - 500mA resettable
thermal fuse.
PR5851 Rev12 490X Eng Ref Guide.qxd 10/05/2012 11:33 Page 99