Precautions
WARNING! All wiring must be performed by a qualified electri-
cian or instrumentation engineer. See diagram for terminal
designations and wiring examples. Consult factory for assis-
tance.
WARNING! Avoid shock hazards! Turn signal input, output, and
power off before connecting or disconnecting wiring, or remov-
ing or installing module.
Précautions
ATTENTION! Tout le câblage doit être effectué par un élec-
tricien ou ingénieur en instrumentation qualifié. Voir le dia-
gramme pour désignations des bornes et des exemples de
câblage. Consulter l'usine pour assistance.
ATTENTION! Éviter les risques de choc! Fermez le signal
d'entrée, le signal de sortie et l'alimentation électrique avant
de connecter ou de déconnecter le câblage, ou de retirer ou
d'installer le module.
Ranges
See the model/serial number label for information, options, and
I/O range information. The voltage and/or milliamp I/O ranges
are factory set for each channel to your exact specifications.
Electrical Connections
See wiring diagrams at right. Observe polarity. If the output
does not function, check wiring and polarity.
*
Do not make any connections to unused terminals or use
them as wiring junctions for external devices. This may cause
permanent damage to the module!
Signal Input Terminals
Polarity must be observed when connecting the signal input.
Terminal 3 provides 20 VDC to power a passive mA transmitter
if required.
The APD 4930 splits and converts a single input signal into two
outputs. See the wiring diagrams at right.
Signal Output Terminals
Polarity must be observed when connecting the signal outputs.
See the module label for the voltage or milliamp output range
for each channel. The standard milliamp output is sourcing. It
provides 20 VDC power to your device.
Optional sinking mA output(s) will be indicated on the module
label as EXT1 for channel 1, EXT2 for channel 2, or EXT3 for
both channel 1 and channel 2.
If the output does not function, check wiring and polarity for
both input and outputs. See note about terminating an unused
mA output channel.
Module Power Terminals
Check model/serial number label for module operating voltage
to make sure it matches available power. The power supply
is fuse protected and the unit may be returned to API for fuse
replacement.
When using DC power, either polarity is acceptable, but for
consistency with similar API products, positive (+) can be wired
to terminal 13 and negative (–) can be wired to terminal 16.
Mounting to a DIN Rail
Install module vertically on a 35 mm DIN rail in a protective
enclosure away from heat sources. Do not block air flow. Allow
1" (25 mm) above and below housing vents for air circulation.
1. Tilt front of module downward and position against DIN rail.
2. Clip lower mount to bottom edge of DIN rail.
3. Push front of module upward until upper
mount snaps into place.
Removal
1. Push up on the bottom back of the module.
2. Tilt front of mod-
ule downward
to release upper
mount from top
edge of DIN rail.
3. The module can
now be removed
from the DIN rail.
Calibration
Input and output ranges are pre-configured at the factory (at
24°C ±1°C) as specified on your order. Front-mounted, Zero
and Span potentiometers for each channel can be used to
calibrate the output to compensate for load and lead variations.
1. Apply power to the module and allow a minimum 20 minute
warm up time.
2. Using an accurate calibration source, provide an input to
the module equal to the minimum input required for the
application.
3. Using an accurate measurement device for the output,
adjust the Zero potentiometer for the exact minimum output
desired. The Zero control should only be adjusted when the
input signal is at its minimum. This will produce the cor-
responding minimum output signal. For example: 4 mA for
a 4-20 mA output or –10 V for a ±10V output.
4. Next, set the input at maximum, then adjust the Span pot for
the exact maximum output desired. The Span control should
only be adjusted when the input signal is at its maximum.
This will produce the corresponding maximum output
signal. Example: for 4-20 mA output, the Span control will
provide adjustment for the 20 mA or high end of the signal.
5. Repeat adjustments for maximum accuracy.
Operation
The APD 4930 is factory configured to your exact input and
output requirements. The voltage or milliamp input is filtered,
either amplified or attenuated as required, then passed through
an optical coupler to the output stage.
A red LoopTracker output LED provides a visual indication that
the output signal is functioning for each channel. It becomes
brighter as the input and the corresponding output change from
minimum to maximum.
For current outputs, the red LED will only light if the output loop
current path is complete. For either current or voltage outputs,
failure to illuminate or a failure to change in intensity as the
process changes may indicate a problem with the module
power or signal output wiring.
Terminal Identification
Installation and Setup
APD 4930
10
9
11 12
–
+
–
+
Voltage
Device 2
Voltage
Device 1
Output 1
Voltage output
Output 2
Voltage output
Output 1
Sinking mA output
with EXT1 or EXT3 option
Output 2
Sinking mA output
with EXT2 or EXT3 option
10
9
11 12
–
+
–
+
Powered
mA
Device 2
Powered
mA
Device 1
Output 1
Sourcing mA output
+20 V
at terminal 10
Output 2
Sourcing mA output
+20 V
at terminal 12
10
9
11 12
–
Passive
mA
Device 2
Passive
mA
Device 1
+20 V
–
+20 V
To maintain full isolation avoid combining power supplies in
common with input, outputs, or unit power.
* Do not make connections to unused terminals!
13 Power AC or DC
+
14
Earth Ground
16 Power AC or DC –
14
13
15
16
Cu 60/75°C
conductors
14 AWG max.
6
5
7
8
Customer-supplied
external contacts for
Output Test Function
Switch closure sets output
to approx. 50% of span
Channel 1 Channel 2
Output 1 Span
Output 1 Zero
Output 2 Span
Output 2 Zero
Voltage Input
2
1
3
4
+
–
Voltage
Xmtr
2
1
3
4
–
+20V
Current Sourcing Input
+20 V
at terminal 3
Passive
mA
Xmtr
R
i
Current Sinking Input
with powered mA Xmtr
Loop
Power
Source
–
+
2
1
3
4
+
–
mA
Xmtr
R
i
+
–
2
1
3
4
+
–
Current Sinking Input with
External Loop Supply
mA
Xmtr
R
i
Loop
Power
Source
–
+
+
–
Spring Clip
Upper Mount
Lower Mount
api-usa.com
1220 American Way Libertyville, IL 60048
Phone:
800-942-0315
Fax: 800-949-7502
A
A
BSOLUTE
BSOLUTE
P
P
ROCESS
ROCESS
I
I
NSTRUMENTS
NSTRUMENTS
API maintains a constant effort to upgrade and improve its products.
Specifications are subject to change without notice. See api-usa.com for
latest product information. Consult factory for your specific requirements.
WARNING:
This product can expose you to chemicals includ-
ing nickel, which are known to the State of California to cause
cancer or birth defects or other reproductive harm. For more
information go to www.P65Warnings.ca.gov
*
Module
powers mA
output loop
*
Module mA
output is
unpowered
EXT1= Ch1
EXT2= Ch2
EXT3= both
Module powers
mA input loop
Module mA input is
unpowered
1
2 3 4
5 6 7 8
9 10 11 12
13 14
15
16
Input
Remote Test
Outputs
Power
Wire terminal
torque
0.5 to 0.6 Nm or
4.4 to 5.3 in-lbs
* To avoid damage to the module, do not leave any unused
mA outputs disconnected. Use a 1000 Ohm 1/2 Watt resis-
tor across terminals 9 & 10 or 11 & 12 if any are not being
used.
* Do not make
connections to
unused terminals!
* Do not make
connections to
unused terminals!
Output
Loop
Tracker
APD 4930
1 DC in to 2 DC out
Isolated Transmitter
Loop
Tracker
Span 2
Zero 2
Output
Span 1
Zero 1
