Marathon Computer AACC 2000 - Manual (Page 18)

Marathon Monitors Inc.
AACC 2000 Carbon Nov. 1, 1997
18
Four terminal modules
Note:
Module 1 is connected to terminals 1A, 1B, 1C and 1D
Module 2 is connected to terminals 2A, 2B, 2C and 2D
Module 3 is connected to terminals 3A, 3B, 3C and 3D
Module type Terminal identity Possible functions
A B C D
lay: changeover
(2A, 264 Vac max.)
Heating, cooling,or
alarm,
DC control: Isolated
(10V, 20mA max.)
++ −−
Heating, or cooling
24Vdc transmitter supply
+ − To power process
inputs
Potentiometer input
100
Ω
to 15K
Ω
+
0.5Vdc 0V
Motorised Valve
Position feedback
DC retransmission + −
Retrans. of setpoint,
or process value
DC remote input or
Process Value 2
(Module 3 only)
0-10Vdc RT source
±
100mV
0-20mA
COM
Remote Setpoint
Second PV
Dual output modules
Dual relay
(2A, 264 Vac max.)
Heating + cooling
Dual alarms
Valve raise & lower
Dual Triac
(1A, 30 to 264Vac)
Heating + cooling
Valve raise & lower
Dual logic + relay
(Logic is non-isolated)
+ −
Heating + cooling
Dual Logic + triac
(Logic is non-isolated)
+ −
Heating + cooling
Triple logic input and output modules - see ratings on the next page
Triple contact input Input 1 Input 2 Input 3 Common
Triple logic input Input 1 Input 2 Input 3 Common
Table 1-2 Four terminal module connections.
(Refer to Fig. 1-8)
Line Load Line Load
Line Load