Vaisala K-PATENTS PR-23 AX Series, Instruction Manual

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14 PR-23 instruction manual
Description of the terminals on the H1 interface card PR-10701 and on the Transmit-
ter motherboard PR-10600 (Figure 3.7):
On H1
A 1 2 3 Connection for Sensor A, signal wires (1, 2), cable shield (3).
B 1 2 3 Connection for Sensor B, signal wires (1, 2), cable shield (3).
On Motherboard
11 12 4–20 mA output 1, positive (11), negative (12), max. load 1000 Ohm, galvanically isolated.
13 14 4–20 mA output 2, positive (13), negative (14), max. load 1000 Ohm, galvanically isolated.
21 22 Relay 1, one contact output, max. 250 V AC, max. 3 A.
23 24 Relay 2, one contact output, max. 250 V AC, max. 3 A.
31 32 33 Power, L (31), N (32), protective earth (33), 100-240 V AC, 50–60 Hz. An external power switch
(Figure 3.6) is recommended.
41 42 24V terminal for DTR internal use only.
Note: Connecting terminal to external 24V supply will void warranty. Connecting external devices
to 24V terminal will void warranty.
51 52 53 54 55 Switch inputs: switch 1 (51), switch 2 (52), switch 3 (53), switch 4 (54) and common 3 volts for all
inputs (55). The switch terminals are galvanically isolated.
3.3.4 Power terminals for AC power
The primary AC power is connected to a separate terminal strip 31/32/33 marked
POWER
in the lower right-hand corner of the Motherboard (Figure 3.7). The three ter-
minals are marked 31/L, 32/N and 33/ (protective earth). The power terminal
33/ is directly connected to the exposed metal parts of the Indicating transmitter
DTR. Wiring to the terminals shall be 1.5mm
2
minimum. The protective fuse in the
building system shall comply with the local requirements.
3.3.5 Power terminals for 24V DC power
The DC power is connected to a terminal stripe marked
POWER
in the lower right-hand
corner of the Motherboard (figure 3.8). The three terminals are , - and
(protective earth). The power terminal
is directly connected to the exposed metal
parts of the Indicating transmitter DTR.
The 24V DC power to this terminal stripe shall be supplied from a secondary circuit
which is double or reinforced insulated from the mains supply within the limits for a
limited-energy circuit (maximum 200 VA/U) according to the IEC 61010-1.
3.3.6 Reset button
It is possible to reset and restart both the Indicating transmitter DTR and the sensor(s)
by pushing the reset button. The button is accessed through the cable hole in the
front panel shield (see Figure 3.9 below). You need a thin stick or similar utensil,
preferably of non-conducting material, to reach the reset button. After pressing the