Analog output and universal input setup
CNT-SVN01C-EN 77
Universal inputs
Each of the six universal inputs may be configured as:
• Binary
• Thermistor
• 0–20 mA
• 0–10 Vdc
• Resistance temperature detectors (RTDs)
(only inputs 1 and 2)
Table 11 shows the load the Tracer MP581 places on sensors.
Binary outputs
The four binary outputs are form A (SPST) relay outputs. These relays
are not dry contacts; they switch 24 Vac. A pilot relay is required for any
application using dry contacts. Relays connected to the binary outputs on
the EX2 cannot exceed 12 VA or 0.5 A current draw at 24 Vac.
Analog outputs
Each of the four analog outputs may be configured as either of the follow-
ing:
• 0–10 Vdc
• 0–20 mA
Analog output and universal input
setup
Configure each analog output and universal input using a LonTalk
ser-
vice tool, such as Trane’s Rover service tool. The service tool requires the
Tracer MP581 software plug-in to configure an EX2. EX2 modules receive
their configuration information from the Tracer MP581 controller they
communicate with. You can do online configuration with the Rover
Comm5 service tool, or you can do offline configuration with Rover Con-
figuration Builder. In either case, the EX2 modules will not receive their
configuration until they are communicating with a configured Tracer
MP581 controller.
The inputs are factory configured to be thermistor. Analog outputs are
configured for voltage. Figure 50 on page 78 shows how to wire some com-
mon sensor types and output devices.
Table 11. Load placed on sensors
Input type Load on sensor
Vdc (linear) 21 kΩ
mA (linear) 221 Ω
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