Installation | 3-29
Current Output Connections
Standard current outputs
Standard current output connections are labeled as follows on the wiring
card of the Series 2000 control unit (see Figure 3-21):
IOUT1 + and -
IOUT2 + and -
These current outputs are referenced as current outputs 1 and 2 in soft-
ware. Be sure to observe polarity when connecting current output devices
to these terminals.
Current outputs 1 and 2 are capable of driving up to 1200 ohm loads.
The standard control unit with no options provides two current outputs.
These two current outputs (1 and 2) are isolated from the control unit,
but are not isolated from each other. If you have the combustibles option,
current outputs 3 and 4 are also isolated from the control unit and from
current outputs 1 and 2.
If you intend to power the current outputs from an external power
supply, see the “External Powering and Modulation of External
Power Using Current Outputs” appendix.
Combustibles option current outputs
If you have the combustibles option, the connections for current outputs 3
and 4 on the wiring card allow you to monitor combustibles information.
They are labeled as follows:
IOUT3+ IOUT4+
IOUT3- IOUT4-
These current outputs are referenced as current outputs 3 and 4 in soft-
ware (see Chapter 4 for help on defining current output settings in soft-
ware). Be sure to observe polarity when connecting current output de-
vices to these terminals. These combustibles current outputs are capable
of driving up to 1200 ohm loads.
Current outputs 3 and 4 are isolated from the control unit and are
isolated from current outputs 1 and 2, but not from each other.
These current outputs are only active if you have the combustibles option
card installed in your control unit.
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