OJ Electronics - Autotuning Temperature Controller

Autotuning Temperature Controller - Type ERZ

ERZ comprises a series of compact and easily set regulators for
the regulation of small and medium-sized heating and ventilation
systems, e.g. heating and cooling surfaces, and floor heating.

Auto-tuning
Simple adjustment
Flush mounting or wall mounting.
Manual control of output in connection with service or starting
LED step indication
LED indication of sensor error
Frost thermostat input
Optional connection of limit sensor
Two-step regulator 0-10V DC
Setback of temperature on external timer
Parallel displacement of room temperature
DIN rail mounting
24V AC/DC regulator series

Product Range

Type	Product	EAN-Nr
ERZ-3951	Temperature regulator, range +5/+40°C. Two heating steps (0-10V DC). Potentiometer for min. temperature limitation.	5703502540863
ERZ-3952	Temperature regulator, range +35/+105°C. Two heating steps (0-10V DC). Potentiometer for min. temperature limitation.	5703502540870
ERZ-3953	Temperature regulator, range +5/+40°C. Two heating steps (0-10V DC). Potentiometer for max. temperature limitation.	5703502540887
ERZ-3954	Temperature regulator, range -10/+35°C. Two cooling steps (0-10V DC). Potentiometer for min. temperature limitation.	5703502540894
ERZ-3955	Temperature regulator, range -10/+35°C. One heating step and one cooling step (0-10V DC) with adjustable neutral zone between the steps. Potentiometer for min. temperature limitation.	5703502540900

Accessories

ERZF-95	Room sensor for wall mounting with built-in potentiometer for parallel displacement of setpoint ±5°C	5703502540962
ETF-944/99-H	Remote room sensor for surface wall mounting
ETF-995	Room sensor for wall mounting	5703866102110
ETF-1195	Duct sensor	5703866100413
ETF-195	Floor sensor	5703866100817
ERZP-10	Potentiometer for parallel displacement of setpoint ±5°C (for panel door mounting)	5703502540931
ERZS-10	Scale for ERZP-10

Function
ERZ is a proportional regulator with built-in auto-tuning which automatically eliminates deviations in the P-band and adjusts the regulator to the load. The auto-tuning function saves the traditional time-consuming adjustment of the system when using conventional control relays. ERZ ensures a very constant regulation of small and medium-sized systems. The ERZ series is equipped with a number of important functions: 0-10V DC output signals for sequential control: Two heating steps, two cooling steps, or one heating step and one cooling step.

Temperature limitation:
Sensor connection for max. or min. limitation. The temperature can be set on the regulator.

Setback of temperature:
The series has a built-in temperature setback function which is activated by an external timer. The setback temperature can be set on the regulator. Frost protection: Connection for mechanical frost thermostat. Temperature limitation When a sensor (limit sensor) is connected to terminals 10 and 11, a max. and min. temperature can be set on the front panel of the regulator.

Min. adjustable limitation (excl. ERZ-3953):
The setting is made on the front panel. This function is only active if a limit sensor is connected. The set value is the minimum temperature which must be maintained where the limit sensor is located. However, this possibility is not valid for ERZ 3954, but this type has a built-in fixed min. setting of 10°C. Max. adjustable limitation: Only valid for ERZ-3953. The setting is made on the front panel. The other ERZ types have a fixed max. value, (see temperature settings).

Technical data

Power supply	24V AC/DC
Power consumption	3 VA
Temperature settings	See table below
DC-output	2 5 0-10V DC (max. 5 mA)
Regulation mode	Auto-tuning
Ambient temperature	-10/+40°C
Housing	IP 20
Dimensions (mm)	L/86 W/52.5 D/58 mm

Temperature settings:

ERZ Type	Temperature Setting	Max. Limit	Min. Limit	Setback Range	Dead Band	Regulation type
3951	+5/+40°C	+55°C	0/+30°C	0/+20°C	None	Heat/Heat
3952	+35/+105°C	+105°C	+25/+55°C	+30/+70°C	None	Heat/Heat
3953	+5/+40°C	+25/+65°C	+10°C	0/+20°C	None	Heat/Heat
3954	-10/+35°C	None	-5/+20°C	-5/+20°C	None	Cool/Cool
3955	-10/+35°C	+55°C	0/+30°C	-6°C	+0.1/+5°C	Cool/Heat