Instruction manual

1110
P o w e rWi r i n g
Figure 7. Process and Linear Input Wiring
Voltage Inputs: Connect the posi-
tive voltage input to contact #20;
the negative input to contact #19.
Current Inputs: Connect the posi-
tive current input to contact #20;
the negative input to contact #19.
The controller's standard power supply accepts 100 to 250
Vac and 130 to 330 Vdc line power without any switch set-
tings or polarity considerations. All connections should be
made in accordance with the National Electrical Code and
local regulations, using only NEC Class 1 wiring for all power
terminals.
It is advisable, but not necessary, to fuse one leg of the
incoming power line, contact #9 or #10, with a 2AG, 0.5 amp
rated fuse. Be sure that only instrument power input is fused
— not power to the load.
Figure 8. Power Wiring Connection
100 - 250 Vac 50/60 HZ
130 - 330 Vdc (Auto Polarity)
S e n s o rI n p u t
C o n n e c t i o n s
Figure 5. Thermocouple Input Wiring
Make sure that you are using the
appropriate thermocouple and
extension wire. Connect the neg-
ative lead (generally colored red
in ISA-type thermocouples) to
contact #19; connect the positive
lead to contact #20. Extension
wires must be the same polarity as the thermocouple.
Figure 6. RTD Wiring
The controller accepts input
from 2- or 3-wire, 100 ohm
platinum resistance temperature
detectors (RTDs). Connect
2-wire RTDs to contacts #19
and #20, with a jumper across
contacts #18 and #19. Keep
leads short and use heavy gauge copper extension wire, if
necessary, to minimize lead resistance. For long runs, 3-wire
RTDs should be used.
Thermocouple circuit
resistance should not
exceed 100 ohms for
rated accuracy; errors
will occur at higher
resistance values. If
shielded thermocouple
wire is used, terminate
the shield only at panel
ground.
Use wire with a resis-
tance no greater than
10 ohms. An error of
0.2° F will result for
each additional 10
ohms of resistance
encountered. If shield-
ed RTD wire is used,
terminate the shield
only at panel ground.