Connecting indicating transmitter - PR-21-S

PR-21 Series User Guide
Document code
IM-EN-PR21S
Revision
C
Language
English
Product
PR-21-S
Document type
User guide

All the electrical terminals of the indicating transmitter are behind the front panel. To access them, first open the enclosure cover. Then loosen the front panel screw in the figure below, and swing open the front panel. All terminals are now accessible.

Figure 1. Opening indicating transmitter front panel
1
Power indicator light
2
Front panel screw

Make sure that you mount an external power switch for the divert control unit that is close to the unit and easily reachable. Make sure that you mark it as a disconnecting device. The following figure shows the recommended external power switch, spare part nr PR‑10900. The ratings of the switch are 10 A and 250 V.

Figure 2. External power switch
Figure 3. Motherboard (AC power).

The following figure shows the motherboard of the indicating transmitter for AC power.

Figure 4. Motherboard (24 V DC).

The following figure shows the motherboard of the indicating transmitter for 24 V DC power.

The following table describes the terminals on the H1 interface card PR‑10701 and on the transmitter motherboard PR‑10600.

Terminal Usage
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 Ω, galvanically isolated.
13 14 4 … 20 mA output 2, positive (13), negative (14), max. load 1000 Ω, galvanically isolated.
21 221 Relay 1, one contact output, max. 240 V AC, max. 3 A, fuse with voltage 250 V AC, max fuse size 3 A, speed slow.
23 241 Relay 2, one contact output, max. 240 V AC, max. 3 A, fuse with voltage 250 V AC, max fuse size 3 A, speed slow.
31 32 331

Power, L (31), N (32), protective earth (33), 100 … 240 V AC, 50 … 60 Hz, fuse with voltage 250 V AC, max. size 10 A and speed slow. An external power switch is mandatory.

Power, + (31), - (32), protective earth (33), 24 V DC ± 10%, fuse with voltage min 48 V DC, max. size 4 A and speed fast.
41 42 24 V terminal for DTR internal use only.
Connecting terminal to external 24 V supply voids the warranty. Connecting external devices to 24 V terminal voids the warranty.
51 52 53 54 55 Switch inputs: switch 1 (51), switch 2 (52), switch 3 (53), switch 4 (54) and common 3 V for all inputs (55). The switch terminals are galvanically isolated.
1 Wiring to terminals should be min. 1.5 mm2 (AWG 18). The fuse voltage should be 250 V, max. size 10 A and fuse speed slow. Torque used is 0.5 Nm … 0.6 Nm. Stripping length is 8 mm for wires.