Table 3: Terminal blocks, functions, ratings, requirements, and cables
Terminal block label
Terminal label
Function, ratings, requirements
Determine wire size and maximum cable
length
Analog Output - Voltage Mode (0–10 VDC)
10 VDC maximum output voltage
10 mA maximum output current
Required an external load of 1,000 ohms or
more.
Note:
The Analog Output (AO)
operates in the Voltage Mode
when connected to devices with
impedances greater than 1,000 ohms.
Devices that drop below 1,000 ohms
may not operate as intended for
Voltage Mode applications.
OUT
n
Analog Output - Current Mode (4–20 mA)
Requires and external load between 0–300
ohms.
Note:
The AO operates in Current
Mode when connected to devices
with impedances less than 300 ohms.
Devices that exceed 300 ohms may
not operate as intended for Current
Mode applications.
ANALOG
(Outputs)
OCOM
n
Analog Output Signal Common
for all
Analog OUT terminals.
Note:
All Analog Output Common
terminals (OCOM
n
) are isolated from
all other commons.
See Guideline
C
in Table 4.
OUT
n
Binary Output - 24 VAC Triac
(External
Power Source)
Connects OUT
n
to OCOM
n
when activated.
External Power Source Requirements:
30 VAC maximum output voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
BINARY
(Output)
Power Selection Jumper
positioned to External
(
EXT
) power.
OCOM
n
Binary Output Common
(for OUT
n
terminal)
Note:
Each Binary Output Common
terminal (OCOM
n
) is isolated from
all
other commons, including other
Binary Output Common terminals.
See Guideline
C
in Table 4.
OUT
n
Binary Output - 24 VAC Triac
(Internal
Power Source)
Sources internal 24 VAC power (24~ HOT).
BINARY
(Output)
Power Selection Jumper
positioned to Internal
(
INT
) power.
OCOM
n
Binary Output - 24 VAC Triac
(Internal
Power Source)
Connects OCOM
n
to 24~ when activated.
Internal Power Source:
30 VAC maximum output voltage
0.5 A maximum output current
1.3 A at 25% duty cycle
40 mA minimum load current
See Guideline
C
in Table 4.
FEC26 Field Equipment Controllers Installation Guide
9