Bell & Gossett 193 TECHNOVAR VARIABLE SPEED PUMP CONTROLLER AND INTEGRATED AJUSTABLE FREQUENCY DRIVE - Manual (Page 26)

Operating Instruction
26
6.4 Control Terminals
All externally used cables have to be shielded. Do not connect the ground of the electronic
components to other potentials (all electronic ground and GND of the RS 485-interface are
connected together internally).
For external off/on switches, contacts suitable for switching <10 VDC are necessary.
If unshielded control cables are used, signal interference may occur and interfere with
the function of the inverter.
Terminal: X1/ 1 GND
2 Actual value input 4...20mA, 50 Ohm load resistance
3 Power supply for external control 15VDC, max. 100mA
4 GND
5 External on/off (release) Ri=10kOhm, 5 Volt DC
(gold plated contact necessary!)
6 GND
7 Low water; Ri=10kOhm, 5 Volt DC
(e.g. incoming pressure switch or water level switch)
8 Thermo switch or PTC (in motor terminal box) Ri=10k, 5 VDC
9 Thermo switch or PTC
10 GND
11 Analog output 0...10 V, max. 2mA
12 Current signal input 4...20mA
13 Voltage signal input 0....10V or 2......10V
14 Digital input
Terminal: X2/ 1 Fault signal relay NC max. 250VAC 1A free of inductivity
(for dry 2 Fault signal relay CC max. 250VAC 1A free of inductivity
Contacts) 3 Fault signal relay NO max. 250VAC 1A free of inductivity
4 Pump operation
signal relay
NC max. 250VAC 1A free of inductivity
5 Pump operation
signal relay
CC max. 250VAC 1A free of inductivity
6 Pump operation
signal relay
NO max. 250VAC 1A free of inductivity
!! Fault relay (X2/2 - X2/3) is closed, when there is no error!!
Terminal: X5-6/ 1 RS 485 SIO - LOW
2 RS 485 SIO + HIGH
3 RS 485 GND
4 RS 485 + 5 VDC max. 20mA out
For supply of external interface
converter